MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR

D. Rodríguez, K. Blaum, W. Nörtershäuser, M. Ahammed, A. Algora, G. Audi, J. Äystö, D. Beck, M. Bender, J. Billowes, M. Block, C. Böhm, G. Bollen, M. Brodeur, T. Brunner, B. A. Bushaw, R. B. Cakirli, P. Campbell, D. Cano-Ott, G. CortésJ. R Crespo López-Urrutia, P. Das, A. Dax, A. De, P. Delheij, T. Dickel, J. Dilling, K. Eberhardt, S. Eliseev, S. Ettenauer, K. T. Flanagan, R. Ferrer, J. E. García-Ramos, E. Gartzke, H. Geissel, S. George, C. Geppert, M. B. Gómez-Hornillos, Y. Gusev, D. Habs, P. H. Heenen, S. Heinz, F. Herfurth, A. Herlert, M. Hobein, G. Huber, M. Huyse, C. Jesch, A. Jokinen, O. Kester, J. Ketelaer, V. Kolhinen, I. Koudriavtsev, M. Kowalska, J. Krämer, S. Kreim, A. Krieger, T. Kühl, A. M. Lallena, A. Lapierre, F. Le Blanc, Y. A. Litvinov, D. Lunney, T. Martínez, G. Marx, M. Matos, E. Minaya-Ramirez, I. Moore, S. Nagy, S. Naimi, D. Neidherr, D. Nesterenko, G. Neyens, Y. N. Novikov, M. Petrick, W. R. Plaß, A. Popov, W. Quint, A. Ray, P. G. Reinhard, J. Repp, C. Roux, B. Rubio, R. Sánchez, B. Schabinger, C. Scheidenberger, D. Schneider, R. Schuch, S. Schwarz, L. Schweikhard, M. Seliverstov, A. Solders, M. Suhonen, J. Szerypo, J. L. Taín, P. G. Thirolf, J. Ullrich, P. van Duppen, A. Vasiliev, G. Vorobjev, C. Weber, K. Wendt, M. Winkler, D. Yordanov, F. Ziegler

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamline at FAIR will allow us to extend the knowledge of these properties further into the region far from stability. The mass and its inherent connection with the nuclear binding energy is a fundamental property of a nuclide, a unique "fingerprint". Thus, precise mass values are important for a variety of applications, ranging from nuclear-structure studies like the investigation of shell closures and the onset of deformation, tests of nuclear mass models and mass formulas, to tests of the weak interaction and of the Standard Model. The required relative accuracy ranges from 10-5 to below 10-8 for radionuclides, which most often have half-lives well below 1 s. Substantial progress in Penning trap mass spectrometry has made this method a prime choice for precision measurements on rare isotopes. The technique has the potential to provide high accuracy and sensitivity even for very short-lived nuclides. Furthermore, ion traps can be used for precision decay studies and offer advantages over existing methods. With MATS (Precision Measurements of very short-lived nuclei using an A_dvanced Trapping System for highly-charged ions) at FAIR we aim to apply several techniques to very short-lived radionuclides: High-accuracy mass measurements, in-trap conversion electron and alpha spectroscopy, and trap-assisted spectroscopy. The experimental setup of MATS is a unique combination of an electron beam ion trap for charge breeding, ion traps for beam preparation, and a high-precision Penning trap system for mass measurements and decay studies. For the mass measurements, MATS offers both a high accuracy and a high sensitivity. A relative mass uncertainty of 10-9 can be reached by employing highly-charged ions and a non-destructive Fourier-Transform Ion-Cyclotron-Resonance (FT-ICR) detection technique on single stored ions. This accuracy limit is important for fundamental interaction tests, but also allows for the study of the fine structure of the nuclear mass surface with unprecedented accuracy, whenever required. The use of the FT-ICR technique provides true single ion sensitivity. This is essential to access isotopes that are produced with minimum rates which are very often the most interesting ones. Instead of pushing for highest accuracy, the high charge state of the ions can also be used to reduce the storage time of the ions, hence making measurements on even shorter-lived isotopes possible. Decay studies in ion traps will become possible with MATS. Novel spectroscopic tools for in-trap high-resolution conversion-electron and charged-particle spectroscopy from carrier-free sources will be developed, aiming e. g. at the measurements of quadrupole moments and E0 strengths. With the possibility of both high-accuracy mass measurements of the shortest-lived isotopes and decay studies, the high sensitivity and accuracy potential of MATS is ideally suited for the study of very exotic nuclides that will only be produced at the FAIR facility. Laser spectroscopy of radioactive isotopes and isomers is an efficient and model-independent approach for the determination of nuclear ground and isomeric state properties. Hyperfine structures and isotope shifts in electronic transitions exhibit readily accessible information on the nuclear spin, magnetic dipole and electric quadrupole moments as well as root-mean-square charge radii. The dependencies of the hyperfine splitting and isotope shift on the nuclear moments and mean square nuclear charge radii are well known and the theoretical framework for the extraction of nuclear parameters is well established. These extracted parameters provide fundamental information on the structure of nuclei at the limits of stability. Vital information on both bulk and valence nuclear properties are derived and an exceptional sensitivity to changes in nuclear deformation is achieved. Laser spectroscopy provides the only mechanism for such studies in exotic systems and uniquely facilitates these studies in a model-independent manner. The accuracy of laser-spectroscopic-determined nuclear properties is very high. Requirements concerning production rates are moderate; collinear spectroscopy has been performed with production rates as few as 100 ions per second and laser-desorption resonance ionization mass spectroscopy (combined with β-delayed neutron detection) has been achieved with rates of only a few atoms per second. This Technical Design Report describes a new Penning trap mass spectrometry setup as well as a number of complementary experimental devices for laser spectroscopy, which will provide a complete system with respect to the physics and isotopes that can be studied. Since MATS and LaSpec require high-quality low-energy beams, the two collaborations have a common beamline to stop the radioactive beam of in-flight produced isotopes and prepare them in a suitable way for transfer to the MATS and LaSpec setups, respectively.

Original languageEnglish
Pages (from-to)1-123
Number of pages123
JournalEuropean Physical Journal: Special Topics
Volume183
Issue number1
DOIs
Publication statusPublished - 2010

Fingerprint

Isotopes
Ions
Lasers
traps
lasers
isotopes
Experiments
Laser spectroscopy
laser spectroscopy
ions
mass spectroscopy
nuclides
Spectroscopy
sensitivity
radioactive isotopes
Nuclear properties
moments
Radioisotopes
spectroscopy
Mass spectrometry

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

MATS and LaSpec : High-precision experiments using ion traps and lasers at FAIR. / Rodríguez, D.; Blaum, K.; Nörtershäuser, W.; Ahammed, M.; Algora, A.; Audi, G.; Äystö, J.; Beck, D.; Bender, M.; Billowes, J.; Block, M.; Böhm, C.; Bollen, G.; Brodeur, M.; Brunner, T.; Bushaw, B. A.; Cakirli, R. B.; Campbell, P.; Cano-Ott, D.; Cortés, G.; López-Urrutia, J. R Crespo; Das, P.; Dax, A.; De, A.; Delheij, P.; Dickel, T.; Dilling, J.; Eberhardt, K.; Eliseev, S.; Ettenauer, S.; Flanagan, K. T.; Ferrer, R.; García-Ramos, J. E.; Gartzke, E.; Geissel, H.; George, S.; Geppert, C.; Gómez-Hornillos, M. B.; Gusev, Y.; Habs, D.; Heenen, P. H.; Heinz, S.; Herfurth, F.; Herlert, A.; Hobein, M.; Huber, G.; Huyse, M.; Jesch, C.; Jokinen, A.; Kester, O.; Ketelaer, J.; Kolhinen, V.; Koudriavtsev, I.; Kowalska, M.; Krämer, J.; Kreim, S.; Krieger, A.; Kühl, T.; Lallena, A. M.; Lapierre, A.; Le Blanc, F.; Litvinov, Y. A.; Lunney, D.; Martínez, T.; Marx, G.; Matos, M.; Minaya-Ramirez, E.; Moore, I.; Nagy, S.; Naimi, S.; Neidherr, D.; Nesterenko, D.; Neyens, G.; Novikov, Y. N.; Petrick, M.; Plaß, W. R.; Popov, A.; Quint, W.; Ray, A.; Reinhard, P. G.; Repp, J.; Roux, C.; Rubio, B.; Sánchez, R.; Schabinger, B.; Scheidenberger, C.; Schneider, D.; Schuch, R.; Schwarz, S.; Schweikhard, L.; Seliverstov, M.; Solders, A.; Suhonen, M.; Szerypo, J.; Taín, J. L.; Thirolf, P. G.; Ullrich, J.; van Duppen, P.; Vasiliev, A.; Vorobjev, G.; Weber, C.; Wendt, K.; Winkler, M.; Yordanov, D.; Ziegler, F.

In: European Physical Journal: Special Topics, Vol. 183, No. 1, 2010, p. 1-123.

Research output: Contribution to journalArticle

Rodríguez, D, Blaum, K, Nörtershäuser, W, Ahammed, M, Algora, A, Audi, G, Äystö, J, Beck, D, Bender, M, Billowes, J, Block, M, Böhm, C, Bollen, G, Brodeur, M, Brunner, T, Bushaw, BA, Cakirli, RB, Campbell, P, Cano-Ott, D, Cortés, G, López-Urrutia, JRC, Das, P, Dax, A, De, A, Delheij, P, Dickel, T, Dilling, J, Eberhardt, K, Eliseev, S, Ettenauer, S, Flanagan, KT, Ferrer, R, García-Ramos, JE, Gartzke, E, Geissel, H, George, S, Geppert, C, Gómez-Hornillos, MB, Gusev, Y, Habs, D, Heenen, PH, Heinz, S, Herfurth, F, Herlert, A, Hobein, M, Huber, G, Huyse, M, Jesch, C, Jokinen, A, Kester, O, Ketelaer, J, Kolhinen, V, Koudriavtsev, I, Kowalska, M, Krämer, J, Kreim, S, Krieger, A, Kühl, T, Lallena, AM, Lapierre, A, Le Blanc, F, Litvinov, YA, Lunney, D, Martínez, T, Marx, G, Matos, M, Minaya-Ramirez, E, Moore, I, Nagy, S, Naimi, S, Neidherr, D, Nesterenko, D, Neyens, G, Novikov, YN, Petrick, M, Plaß, WR, Popov, A, Quint, W, Ray, A, Reinhard, PG, Repp, J, Roux, C, Rubio, B, Sánchez, R, Schabinger, B, Scheidenberger, C, Schneider, D, Schuch, R, Schwarz, S, Schweikhard, L, Seliverstov, M, Solders, A, Suhonen, M, Szerypo, J, Taín, JL, Thirolf, PG, Ullrich, J, van Duppen, P, Vasiliev, A, Vorobjev, G, Weber, C, Wendt, K, Winkler, M, Yordanov, D & Ziegler, F 2010, 'MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR', European Physical Journal: Special Topics, vol. 183, no. 1, pp. 1-123. https://doi.org/10.1140/epjst/e2010-01231-2
Rodríguez, D. ; Blaum, K. ; Nörtershäuser, W. ; Ahammed, M. ; Algora, A. ; Audi, G. ; Äystö, J. ; Beck, D. ; Bender, M. ; Billowes, J. ; Block, M. ; Böhm, C. ; Bollen, G. ; Brodeur, M. ; Brunner, T. ; Bushaw, B. A. ; Cakirli, R. B. ; Campbell, P. ; Cano-Ott, D. ; Cortés, G. ; López-Urrutia, J. R Crespo ; Das, P. ; Dax, A. ; De, A. ; Delheij, P. ; Dickel, T. ; Dilling, J. ; Eberhardt, K. ; Eliseev, S. ; Ettenauer, S. ; Flanagan, K. T. ; Ferrer, R. ; García-Ramos, J. E. ; Gartzke, E. ; Geissel, H. ; George, S. ; Geppert, C. ; Gómez-Hornillos, M. B. ; Gusev, Y. ; Habs, D. ; Heenen, P. H. ; Heinz, S. ; Herfurth, F. ; Herlert, A. ; Hobein, M. ; Huber, G. ; Huyse, M. ; Jesch, C. ; Jokinen, A. ; Kester, O. ; Ketelaer, J. ; Kolhinen, V. ; Koudriavtsev, I. ; Kowalska, M. ; Krämer, J. ; Kreim, S. ; Krieger, A. ; Kühl, T. ; Lallena, A. M. ; Lapierre, A. ; Le Blanc, F. ; Litvinov, Y. A. ; Lunney, D. ; Martínez, T. ; Marx, G. ; Matos, M. ; Minaya-Ramirez, E. ; Moore, I. ; Nagy, S. ; Naimi, S. ; Neidherr, D. ; Nesterenko, D. ; Neyens, G. ; Novikov, Y. N. ; Petrick, M. ; Plaß, W. R. ; Popov, A. ; Quint, W. ; Ray, A. ; Reinhard, P. G. ; Repp, J. ; Roux, C. ; Rubio, B. ; Sánchez, R. ; Schabinger, B. ; Scheidenberger, C. ; Schneider, D. ; Schuch, R. ; Schwarz, S. ; Schweikhard, L. ; Seliverstov, M. ; Solders, A. ; Suhonen, M. ; Szerypo, J. ; Taín, J. L. ; Thirolf, P. G. ; Ullrich, J. ; van Duppen, P. ; Vasiliev, A. ; Vorobjev, G. ; Weber, C. ; Wendt, K. ; Winkler, M. ; Yordanov, D. ; Ziegler, F. / MATS and LaSpec : High-precision experiments using ion traps and lasers at FAIR. In: European Physical Journal: Special Topics. 2010 ; Vol. 183, No. 1. pp. 1-123.
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title = "MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR",
abstract = "Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamline at FAIR will allow us to extend the knowledge of these properties further into the region far from stability. The mass and its inherent connection with the nuclear binding energy is a fundamental property of a nuclide, a unique {"}fingerprint{"}. Thus, precise mass values are important for a variety of applications, ranging from nuclear-structure studies like the investigation of shell closures and the onset of deformation, tests of nuclear mass models and mass formulas, to tests of the weak interaction and of the Standard Model. The required relative accuracy ranges from 10-5 to below 10-8 for radionuclides, which most often have half-lives well below 1 s. Substantial progress in Penning trap mass spectrometry has made this method a prime choice for precision measurements on rare isotopes. The technique has the potential to provide high accuracy and sensitivity even for very short-lived nuclides. Furthermore, ion traps can be used for precision decay studies and offer advantages over existing methods. With MATS (Precision Measurements of very short-lived nuclei using an A_dvanced Trapping System for highly-charged ions) at FAIR we aim to apply several techniques to very short-lived radionuclides: High-accuracy mass measurements, in-trap conversion electron and alpha spectroscopy, and trap-assisted spectroscopy. The experimental setup of MATS is a unique combination of an electron beam ion trap for charge breeding, ion traps for beam preparation, and a high-precision Penning trap system for mass measurements and decay studies. For the mass measurements, MATS offers both a high accuracy and a high sensitivity. A relative mass uncertainty of 10-9 can be reached by employing highly-charged ions and a non-destructive Fourier-Transform Ion-Cyclotron-Resonance (FT-ICR) detection technique on single stored ions. This accuracy limit is important for fundamental interaction tests, but also allows for the study of the fine structure of the nuclear mass surface with unprecedented accuracy, whenever required. The use of the FT-ICR technique provides true single ion sensitivity. This is essential to access isotopes that are produced with minimum rates which are very often the most interesting ones. Instead of pushing for highest accuracy, the high charge state of the ions can also be used to reduce the storage time of the ions, hence making measurements on even shorter-lived isotopes possible. Decay studies in ion traps will become possible with MATS. Novel spectroscopic tools for in-trap high-resolution conversion-electron and charged-particle spectroscopy from carrier-free sources will be developed, aiming e. g. at the measurements of quadrupole moments and E0 strengths. With the possibility of both high-accuracy mass measurements of the shortest-lived isotopes and decay studies, the high sensitivity and accuracy potential of MATS is ideally suited for the study of very exotic nuclides that will only be produced at the FAIR facility. Laser spectroscopy of radioactive isotopes and isomers is an efficient and model-independent approach for the determination of nuclear ground and isomeric state properties. Hyperfine structures and isotope shifts in electronic transitions exhibit readily accessible information on the nuclear spin, magnetic dipole and electric quadrupole moments as well as root-mean-square charge radii. The dependencies of the hyperfine splitting and isotope shift on the nuclear moments and mean square nuclear charge radii are well known and the theoretical framework for the extraction of nuclear parameters is well established. These extracted parameters provide fundamental information on the structure of nuclei at the limits of stability. Vital information on both bulk and valence nuclear properties are derived and an exceptional sensitivity to changes in nuclear deformation is achieved. Laser spectroscopy provides the only mechanism for such studies in exotic systems and uniquely facilitates these studies in a model-independent manner. The accuracy of laser-spectroscopic-determined nuclear properties is very high. Requirements concerning production rates are moderate; collinear spectroscopy has been performed with production rates as few as 100 ions per second and laser-desorption resonance ionization mass spectroscopy (combined with β-delayed neutron detection) has been achieved with rates of only a few atoms per second. This Technical Design Report describes a new Penning trap mass spectrometry setup as well as a number of complementary experimental devices for laser spectroscopy, which will provide a complete system with respect to the physics and isotopes that can be studied. Since MATS and LaSpec require high-quality low-energy beams, the two collaborations have a common beamline to stop the radioactive beam of in-flight produced isotopes and prepare them in a suitable way for transfer to the MATS and LaSpec setups, respectively.",
author = "D. Rodr{\'i}guez and K. Blaum and W. N{\"o}rtersh{\"a}user and M. Ahammed and A. Algora and G. Audi and J. {\"A}yst{\"o} and D. Beck and M. Bender and J. Billowes and M. Block and C. B{\"o}hm and G. Bollen and M. Brodeur and T. Brunner and Bushaw, {B. A.} and Cakirli, {R. B.} and P. Campbell and D. Cano-Ott and G. Cort{\'e}s and L{\'o}pez-Urrutia, {J. R Crespo} and P. Das and A. Dax and A. De and P. Delheij and T. Dickel and J. Dilling and K. Eberhardt and S. Eliseev and S. Ettenauer and Flanagan, {K. T.} and R. Ferrer and Garc{\'i}a-Ramos, {J. E.} and E. Gartzke and H. Geissel and S. George and C. Geppert and G{\'o}mez-Hornillos, {M. B.} and Y. Gusev and D. Habs and Heenen, {P. H.} and S. Heinz and F. Herfurth and A. Herlert and M. Hobein and G. Huber and M. Huyse and C. Jesch and A. Jokinen and O. Kester and J. Ketelaer and V. Kolhinen and I. Koudriavtsev and M. Kowalska and J. Kr{\"a}mer and S. Kreim and A. Krieger and T. K{\"u}hl and Lallena, {A. M.} and A. Lapierre and {Le Blanc}, F. and Litvinov, {Y. A.} and D. Lunney and T. Mart{\'i}nez and G. Marx and M. Matos and E. Minaya-Ramirez and I. Moore and S. Nagy and S. Naimi and D. Neidherr and D. Nesterenko and G. Neyens and Novikov, {Y. N.} and M. Petrick and Pla{\ss}, {W. R.} and A. Popov and W. Quint and A. Ray and Reinhard, {P. G.} and J. Repp and C. Roux and B. Rubio and R. S{\'a}nchez and B. Schabinger and C. Scheidenberger and D. Schneider and R. Schuch and S. Schwarz and L. Schweikhard and M. Seliverstov and A. Solders and M. Suhonen and J. Szerypo and Ta{\'i}n, {J. L.} and Thirolf, {P. G.} and J. Ullrich and {van Duppen}, P. and A. Vasiliev and G. Vorobjev and C. Weber and K. Wendt and M. Winkler and D. Yordanov and F. Ziegler",
year = "2010",
doi = "10.1140/epjst/e2010-01231-2",
language = "English",
volume = "183",
pages = "1--123",
journal = "European Physical Journal: Special Topics",
issn = "1951-6355",
publisher = "Springer Verlag",
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}

TY - JOUR

T1 - MATS and LaSpec

T2 - High-precision experiments using ion traps and lasers at FAIR

AU - Rodríguez, D.

AU - Blaum, K.

AU - Nörtershäuser, W.

AU - Ahammed, M.

AU - Algora, A.

AU - Audi, G.

AU - Äystö, J.

AU - Beck, D.

AU - Bender, M.

AU - Billowes, J.

AU - Block, M.

AU - Böhm, C.

AU - Bollen, G.

AU - Brodeur, M.

AU - Brunner, T.

AU - Bushaw, B. A.

AU - Cakirli, R. B.

AU - Campbell, P.

AU - Cano-Ott, D.

AU - Cortés, G.

AU - López-Urrutia, J. R Crespo

AU - Das, P.

AU - Dax, A.

AU - De, A.

AU - Delheij, P.

AU - Dickel, T.

AU - Dilling, J.

AU - Eberhardt, K.

AU - Eliseev, S.

AU - Ettenauer, S.

AU - Flanagan, K. T.

AU - Ferrer, R.

AU - García-Ramos, J. E.

AU - Gartzke, E.

AU - Geissel, H.

AU - George, S.

AU - Geppert, C.

AU - Gómez-Hornillos, M. B.

AU - Gusev, Y.

AU - Habs, D.

AU - Heenen, P. H.

AU - Heinz, S.

AU - Herfurth, F.

AU - Herlert, A.

AU - Hobein, M.

AU - Huber, G.

AU - Huyse, M.

AU - Jesch, C.

AU - Jokinen, A.

AU - Kester, O.

AU - Ketelaer, J.

AU - Kolhinen, V.

AU - Koudriavtsev, I.

AU - Kowalska, M.

AU - Krämer, J.

AU - Kreim, S.

AU - Krieger, A.

AU - Kühl, T.

AU - Lallena, A. M.

AU - Lapierre, A.

AU - Le Blanc, F.

AU - Litvinov, Y. A.

AU - Lunney, D.

AU - Martínez, T.

AU - Marx, G.

AU - Matos, M.

AU - Minaya-Ramirez, E.

AU - Moore, I.

AU - Nagy, S.

AU - Naimi, S.

AU - Neidherr, D.

AU - Nesterenko, D.

AU - Neyens, G.

AU - Novikov, Y. N.

AU - Petrick, M.

AU - Plaß, W. R.

AU - Popov, A.

AU - Quint, W.

AU - Ray, A.

AU - Reinhard, P. G.

AU - Repp, J.

AU - Roux, C.

AU - Rubio, B.

AU - Sánchez, R.

AU - Schabinger, B.

AU - Scheidenberger, C.

AU - Schneider, D.

AU - Schuch, R.

AU - Schwarz, S.

AU - Schweikhard, L.

AU - Seliverstov, M.

AU - Solders, A.

AU - Suhonen, M.

AU - Szerypo, J.

AU - Taín, J. L.

AU - Thirolf, P. G.

AU - Ullrich, J.

AU - van Duppen, P.

AU - Vasiliev, A.

AU - Vorobjev, G.

AU - Weber, C.

AU - Wendt, K.

AU - Winkler, M.

AU - Yordanov, D.

AU - Ziegler, F.

PY - 2010

Y1 - 2010

N2 - Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamline at FAIR will allow us to extend the knowledge of these properties further into the region far from stability. The mass and its inherent connection with the nuclear binding energy is a fundamental property of a nuclide, a unique "fingerprint". Thus, precise mass values are important for a variety of applications, ranging from nuclear-structure studies like the investigation of shell closures and the onset of deformation, tests of nuclear mass models and mass formulas, to tests of the weak interaction and of the Standard Model. The required relative accuracy ranges from 10-5 to below 10-8 for radionuclides, which most often have half-lives well below 1 s. Substantial progress in Penning trap mass spectrometry has made this method a prime choice for precision measurements on rare isotopes. The technique has the potential to provide high accuracy and sensitivity even for very short-lived nuclides. Furthermore, ion traps can be used for precision decay studies and offer advantages over existing methods. With MATS (Precision Measurements of very short-lived nuclei using an A_dvanced Trapping System for highly-charged ions) at FAIR we aim to apply several techniques to very short-lived radionuclides: High-accuracy mass measurements, in-trap conversion electron and alpha spectroscopy, and trap-assisted spectroscopy. The experimental setup of MATS is a unique combination of an electron beam ion trap for charge breeding, ion traps for beam preparation, and a high-precision Penning trap system for mass measurements and decay studies. For the mass measurements, MATS offers both a high accuracy and a high sensitivity. A relative mass uncertainty of 10-9 can be reached by employing highly-charged ions and a non-destructive Fourier-Transform Ion-Cyclotron-Resonance (FT-ICR) detection technique on single stored ions. This accuracy limit is important for fundamental interaction tests, but also allows for the study of the fine structure of the nuclear mass surface with unprecedented accuracy, whenever required. The use of the FT-ICR technique provides true single ion sensitivity. This is essential to access isotopes that are produced with minimum rates which are very often the most interesting ones. Instead of pushing for highest accuracy, the high charge state of the ions can also be used to reduce the storage time of the ions, hence making measurements on even shorter-lived isotopes possible. Decay studies in ion traps will become possible with MATS. Novel spectroscopic tools for in-trap high-resolution conversion-electron and charged-particle spectroscopy from carrier-free sources will be developed, aiming e. g. at the measurements of quadrupole moments and E0 strengths. With the possibility of both high-accuracy mass measurements of the shortest-lived isotopes and decay studies, the high sensitivity and accuracy potential of MATS is ideally suited for the study of very exotic nuclides that will only be produced at the FAIR facility. Laser spectroscopy of radioactive isotopes and isomers is an efficient and model-independent approach for the determination of nuclear ground and isomeric state properties. Hyperfine structures and isotope shifts in electronic transitions exhibit readily accessible information on the nuclear spin, magnetic dipole and electric quadrupole moments as well as root-mean-square charge radii. The dependencies of the hyperfine splitting and isotope shift on the nuclear moments and mean square nuclear charge radii are well known and the theoretical framework for the extraction of nuclear parameters is well established. These extracted parameters provide fundamental information on the structure of nuclei at the limits of stability. Vital information on both bulk and valence nuclear properties are derived and an exceptional sensitivity to changes in nuclear deformation is achieved. Laser spectroscopy provides the only mechanism for such studies in exotic systems and uniquely facilitates these studies in a model-independent manner. The accuracy of laser-spectroscopic-determined nuclear properties is very high. Requirements concerning production rates are moderate; collinear spectroscopy has been performed with production rates as few as 100 ions per second and laser-desorption resonance ionization mass spectroscopy (combined with β-delayed neutron detection) has been achieved with rates of only a few atoms per second. This Technical Design Report describes a new Penning trap mass spectrometry setup as well as a number of complementary experimental devices for laser spectroscopy, which will provide a complete system with respect to the physics and isotopes that can be studied. Since MATS and LaSpec require high-quality low-energy beams, the two collaborations have a common beamline to stop the radioactive beam of in-flight produced isotopes and prepare them in a suitable way for transfer to the MATS and LaSpec setups, respectively.

AB - Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamline at FAIR will allow us to extend the knowledge of these properties further into the region far from stability. The mass and its inherent connection with the nuclear binding energy is a fundamental property of a nuclide, a unique "fingerprint". Thus, precise mass values are important for a variety of applications, ranging from nuclear-structure studies like the investigation of shell closures and the onset of deformation, tests of nuclear mass models and mass formulas, to tests of the weak interaction and of the Standard Model. The required relative accuracy ranges from 10-5 to below 10-8 for radionuclides, which most often have half-lives well below 1 s. Substantial progress in Penning trap mass spectrometry has made this method a prime choice for precision measurements on rare isotopes. The technique has the potential to provide high accuracy and sensitivity even for very short-lived nuclides. Furthermore, ion traps can be used for precision decay studies and offer advantages over existing methods. With MATS (Precision Measurements of very short-lived nuclei using an A_dvanced Trapping System for highly-charged ions) at FAIR we aim to apply several techniques to very short-lived radionuclides: High-accuracy mass measurements, in-trap conversion electron and alpha spectroscopy, and trap-assisted spectroscopy. The experimental setup of MATS is a unique combination of an electron beam ion trap for charge breeding, ion traps for beam preparation, and a high-precision Penning trap system for mass measurements and decay studies. For the mass measurements, MATS offers both a high accuracy and a high sensitivity. A relative mass uncertainty of 10-9 can be reached by employing highly-charged ions and a non-destructive Fourier-Transform Ion-Cyclotron-Resonance (FT-ICR) detection technique on single stored ions. This accuracy limit is important for fundamental interaction tests, but also allows for the study of the fine structure of the nuclear mass surface with unprecedented accuracy, whenever required. The use of the FT-ICR technique provides true single ion sensitivity. This is essential to access isotopes that are produced with minimum rates which are very often the most interesting ones. Instead of pushing for highest accuracy, the high charge state of the ions can also be used to reduce the storage time of the ions, hence making measurements on even shorter-lived isotopes possible. Decay studies in ion traps will become possible with MATS. Novel spectroscopic tools for in-trap high-resolution conversion-electron and charged-particle spectroscopy from carrier-free sources will be developed, aiming e. g. at the measurements of quadrupole moments and E0 strengths. With the possibility of both high-accuracy mass measurements of the shortest-lived isotopes and decay studies, the high sensitivity and accuracy potential of MATS is ideally suited for the study of very exotic nuclides that will only be produced at the FAIR facility. Laser spectroscopy of radioactive isotopes and isomers is an efficient and model-independent approach for the determination of nuclear ground and isomeric state properties. Hyperfine structures and isotope shifts in electronic transitions exhibit readily accessible information on the nuclear spin, magnetic dipole and electric quadrupole moments as well as root-mean-square charge radii. The dependencies of the hyperfine splitting and isotope shift on the nuclear moments and mean square nuclear charge radii are well known and the theoretical framework for the extraction of nuclear parameters is well established. These extracted parameters provide fundamental information on the structure of nuclei at the limits of stability. Vital information on both bulk and valence nuclear properties are derived and an exceptional sensitivity to changes in nuclear deformation is achieved. Laser spectroscopy provides the only mechanism for such studies in exotic systems and uniquely facilitates these studies in a model-independent manner. The accuracy of laser-spectroscopic-determined nuclear properties is very high. Requirements concerning production rates are moderate; collinear spectroscopy has been performed with production rates as few as 100 ions per second and laser-desorption resonance ionization mass spectroscopy (combined with β-delayed neutron detection) has been achieved with rates of only a few atoms per second. This Technical Design Report describes a new Penning trap mass spectrometry setup as well as a number of complementary experimental devices for laser spectroscopy, which will provide a complete system with respect to the physics and isotopes that can be studied. Since MATS and LaSpec require high-quality low-energy beams, the two collaborations have a common beamline to stop the radioactive beam of in-flight produced isotopes and prepare them in a suitable way for transfer to the MATS and LaSpec setups, respectively.

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U2 - 10.1140/epjst/e2010-01231-2

DO - 10.1140/epjst/e2010-01231-2

M3 - Article

AN - SCOPUS:77954514989

VL - 183

SP - 1

EP - 123

JO - European Physical Journal: Special Topics

JF - European Physical Journal: Special Topics

SN - 1951-6355

IS - 1

ER -