Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator

C. Michelagnoli, R. Depalo, C. A. Ur, R. Menegazzo, C. Broggini, D. Bazzacco, A. Caciolli, E. Farnea, S. Lunardi, D. Bemmerer, N. Keeley, M. Erhard, Zs. S. Fülöp, A. Gottardo, M. Marta, D. Mengoni, T. Mijatović, F. Recchia, C. Rossi-Alvarez, T. Szücs & 1 others J. J. Valiente-Dobon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The preliminary results of a new direct measurement of the lifetime of the first excited 3/2+ state in 15O are discussed. An accurate evaluation of this lifetime is of paramount importance for the determination of the cross section of the 14N(p,γ)15O reaction, the slowest one in the CNO cycle, at the energies of the solar Gamow peak. The 2H(14N,15O)n reaction in inverse kinematics at 32MeV beam energy (XTU Tandem, LNL) was used to populate the level of interest, which decays via a 6.79 MeV E1 gamma-ray transition to the ground state. Gamma rays were detected with 4 triple clusters of HPGe detectors of the AGATA Demonstrator array. The energy resolution and position sensitivity of this state-of-the-art gamma-ray spectrometer have been exploited to investigate the Doppler Shift Attenuation effect on the lineshape of the gamma-ray peak in the energy spectrum. The deconvolution of the lifetime effects from those due to the kinematics of the emitting nuclei has been performed using detailed Monte Carlo simulations of the gamma emission and detection. CDCC-CRC calculations for the nucleon transfer process have been used for this purpose and preliminary results are shown.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages281-286
Number of pages6
Volume1484
DOIs
Publication statusPublished - 2012
EventInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japan
Duration: Nov 14 2011Nov 17 2011

Other

OtherInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
CountryJapan
CityWako
Period11/14/1111/17/11

Fingerprint

gamma rays
life (durability)
inverse kinematics
gamma ray spectrometers
energy
energy spectra
kinematics
attenuation
cycles
nuclei
ground state
evaluation
sensitivity
shift
detectors
cross sections
decay
simulation

Keywords

  • AGATA
  • CNO cycle
  • Doppler shift attenuation
  • gamma-ray tracking

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Michelagnoli, C., Depalo, R., Ur, C. A., Menegazzo, R., Broggini, C., Bazzacco, D., ... Valiente-Dobon, J. J. (2012). Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator. In AIP Conference Proceedings (Vol. 1484, pp. 281-286) https://doi.org/10.1063/1.4763408

Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator. / Michelagnoli, C.; Depalo, R.; Ur, C. A.; Menegazzo, R.; Broggini, C.; Bazzacco, D.; Caciolli, A.; Farnea, E.; Lunardi, S.; Bemmerer, D.; Keeley, N.; Erhard, M.; Fülöp, Zs. S.; Gottardo, A.; Marta, M.; Mengoni, D.; Mijatović, T.; Recchia, F.; Rossi-Alvarez, C.; Szücs, T.; Valiente-Dobon, J. J.

AIP Conference Proceedings. Vol. 1484 2012. p. 281-286.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Michelagnoli, C, Depalo, R, Ur, CA, Menegazzo, R, Broggini, C, Bazzacco, D, Caciolli, A, Farnea, E, Lunardi, S, Bemmerer, D, Keeley, N, Erhard, M, Fülöp, ZS, Gottardo, A, Marta, M, Mengoni, D, Mijatović, T, Recchia, F, Rossi-Alvarez, C, Szücs, T & Valiente-Dobon, JJ 2012, Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator. in AIP Conference Proceedings. vol. 1484, pp. 281-286, International Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011, Wako, Japan, 11/14/11. https://doi.org/10.1063/1.4763408
Michelagnoli C, Depalo R, Ur CA, Menegazzo R, Broggini C, Bazzacco D et al. Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator. In AIP Conference Proceedings. Vol. 1484. 2012. p. 281-286 https://doi.org/10.1063/1.4763408
Michelagnoli, C. ; Depalo, R. ; Ur, C. A. ; Menegazzo, R. ; Broggini, C. ; Bazzacco, D. ; Caciolli, A. ; Farnea, E. ; Lunardi, S. ; Bemmerer, D. ; Keeley, N. ; Erhard, M. ; Fülöp, Zs. S. ; Gottardo, A. ; Marta, M. ; Mengoni, D. ; Mijatović, T. ; Recchia, F. ; Rossi-Alvarez, C. ; Szücs, T. ; Valiente-Dobon, J. J. / Lifetime measurement of the 6.79 MeV state in 15O with the AGATA demonstrator. AIP Conference Proceedings. Vol. 1484 2012. pp. 281-286
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abstract = "The preliminary results of a new direct measurement of the lifetime of the first excited 3/2+ state in 15O are discussed. An accurate evaluation of this lifetime is of paramount importance for the determination of the cross section of the 14N(p,γ)15O reaction, the slowest one in the CNO cycle, at the energies of the solar Gamow peak. The 2H(14N,15O)n reaction in inverse kinematics at 32MeV beam energy (XTU Tandem, LNL) was used to populate the level of interest, which decays via a 6.79 MeV E1 gamma-ray transition to the ground state. Gamma rays were detected with 4 triple clusters of HPGe detectors of the AGATA Demonstrator array. The energy resolution and position sensitivity of this state-of-the-art gamma-ray spectrometer have been exploited to investigate the Doppler Shift Attenuation effect on the lineshape of the gamma-ray peak in the energy spectrum. The deconvolution of the lifetime effects from those due to the kinematics of the emitting nuclei has been performed using detailed Monte Carlo simulations of the gamma emission and detection. CDCC-CRC calculations for the nucleon transfer process have been used for this purpose and preliminary results are shown.",
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AU - Bazzacco, D.

AU - Caciolli, A.

AU - Farnea, E.

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AU - Mengoni, D.

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AU - Valiente-Dobon, J. J.

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N2 - The preliminary results of a new direct measurement of the lifetime of the first excited 3/2+ state in 15O are discussed. An accurate evaluation of this lifetime is of paramount importance for the determination of the cross section of the 14N(p,γ)15O reaction, the slowest one in the CNO cycle, at the energies of the solar Gamow peak. The 2H(14N,15O)n reaction in inverse kinematics at 32MeV beam energy (XTU Tandem, LNL) was used to populate the level of interest, which decays via a 6.79 MeV E1 gamma-ray transition to the ground state. Gamma rays were detected with 4 triple clusters of HPGe detectors of the AGATA Demonstrator array. The energy resolution and position sensitivity of this state-of-the-art gamma-ray spectrometer have been exploited to investigate the Doppler Shift Attenuation effect on the lineshape of the gamma-ray peak in the energy spectrum. The deconvolution of the lifetime effects from those due to the kinematics of the emitting nuclei has been performed using detailed Monte Carlo simulations of the gamma emission and detection. CDCC-CRC calculations for the nucleon transfer process have been used for this purpose and preliminary results are shown.

AB - The preliminary results of a new direct measurement of the lifetime of the first excited 3/2+ state in 15O are discussed. An accurate evaluation of this lifetime is of paramount importance for the determination of the cross section of the 14N(p,γ)15O reaction, the slowest one in the CNO cycle, at the energies of the solar Gamow peak. The 2H(14N,15O)n reaction in inverse kinematics at 32MeV beam energy (XTU Tandem, LNL) was used to populate the level of interest, which decays via a 6.79 MeV E1 gamma-ray transition to the ground state. Gamma rays were detected with 4 triple clusters of HPGe detectors of the AGATA Demonstrator array. The energy resolution and position sensitivity of this state-of-the-art gamma-ray spectrometer have been exploited to investigate the Doppler Shift Attenuation effect on the lineshape of the gamma-ray peak in the energy spectrum. The deconvolution of the lifetime effects from those due to the kinematics of the emitting nuclei has been performed using detailed Monte Carlo simulations of the gamma emission and detection. CDCC-CRC calculations for the nucleon transfer process have been used for this purpose and preliminary results are shown.

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