α Clustering in Si 28 probed through the identification of high-lying 0+ states

P. Adsley, D. G. Jenkins, J. Cseh, S. S. Dimitriova, J. W. Brümmer, K. C W Li, D. J. Marín-Lámbarri, K. Lukyanov, N. Y. Kheswa, R. Neveling, P. Papka, L. Pellegri, V. Pesudo, L. C. Pool, G. Riczu, F. D. Smit, J. J. Van Zyl, E. Zemlyanaya

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as C12 and O16. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in Ca40 and neighboring nuclei and find good description within shell model, mean-field, and α-cluster models. The utility of the α-cluster description may be probed further by extending such studies to more challenging cases comprising lighter α-conjugate nuclei such as Mg24, Si28, and S32. Purpose: The purpose of this study is to look for the number and energy of isoscalar 0+ states in Si28. These states are the potential bandheads for superdeformed bands in Si28 corresponding to the exotic structures of Si28. Of particular interest is locating the 0+ bandhead of the previously identified superdeformed band in Si28. Methods: α-particle inelastic scattering from a Sinat target at very forward angles including 0 has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators. Results: Several 0+ states have been identified above 9 MeV in Si28. A newly identified 9.71 MeV 0+ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited 0+ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band. Conclusion: Excited isoscalar 0+ states in Si28 have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry.

Original languageEnglish
Article number024319
JournalPhysical Review C
Volume95
Issue number2
DOIs
Publication statusPublished - Feb 16 2017

Fingerprint

nuclei
Republic of South Africa
symmetry
nuclear structure
predictions
scintillation counters
excitation
inelastic scattering
accelerators
plastics
chambers
spectrometers
momentum
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Adsley, P., Jenkins, D. G., Cseh, J., Dimitriova, S. S., Brümmer, J. W., Li, K. C. W., ... Zemlyanaya, E. (2017). α Clustering in Si 28 probed through the identification of high-lying 0+ states. Physical Review C, 95(2), [024319]. https://doi.org/10.1103/PhysRevC.95.024319

α Clustering in Si 28 probed through the identification of high-lying 0+ states. / Adsley, P.; Jenkins, D. G.; Cseh, J.; Dimitriova, S. S.; Brümmer, J. W.; Li, K. C W; Marín-Lámbarri, D. J.; Lukyanov, K.; Kheswa, N. Y.; Neveling, R.; Papka, P.; Pellegri, L.; Pesudo, V.; Pool, L. C.; Riczu, G.; Smit, F. D.; Van Zyl, J. J.; Zemlyanaya, E.

In: Physical Review C, Vol. 95, No. 2, 024319, 16.02.2017.

Research output: Contribution to journalArticle

Adsley, P, Jenkins, DG, Cseh, J, Dimitriova, SS, Brümmer, JW, Li, KCW, Marín-Lámbarri, DJ, Lukyanov, K, Kheswa, NY, Neveling, R, Papka, P, Pellegri, L, Pesudo, V, Pool, LC, Riczu, G, Smit, FD, Van Zyl, JJ & Zemlyanaya, E 2017, 'α Clustering in Si 28 probed through the identification of high-lying 0+ states', Physical Review C, vol. 95, no. 2, 024319. https://doi.org/10.1103/PhysRevC.95.024319
Adsley, P. ; Jenkins, D. G. ; Cseh, J. ; Dimitriova, S. S. ; Brümmer, J. W. ; Li, K. C W ; Marín-Lámbarri, D. J. ; Lukyanov, K. ; Kheswa, N. Y. ; Neveling, R. ; Papka, P. ; Pellegri, L. ; Pesudo, V. ; Pool, L. C. ; Riczu, G. ; Smit, F. D. ; Van Zyl, J. J. ; Zemlyanaya, E. / α Clustering in Si 28 probed through the identification of high-lying 0+ states. In: Physical Review C. 2017 ; Vol. 95, No. 2.
@article{a589725d7f01438e88f5c4cc1f04fb24,
title = "α Clustering in Si 28 probed through the identification of high-lying 0+ states",
abstract = "Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as C12 and O16. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in Ca40 and neighboring nuclei and find good description within shell model, mean-field, and α-cluster models. The utility of the α-cluster description may be probed further by extending such studies to more challenging cases comprising lighter α-conjugate nuclei such as Mg24, Si28, and S32. Purpose: The purpose of this study is to look for the number and energy of isoscalar 0+ states in Si28. These states are the potential bandheads for superdeformed bands in Si28 corresponding to the exotic structures of Si28. Of particular interest is locating the 0+ bandhead of the previously identified superdeformed band in Si28. Methods: α-particle inelastic scattering from a Sinat target at very forward angles including 0 has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators. Results: Several 0+ states have been identified above 9 MeV in Si28. A newly identified 9.71 MeV 0+ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited 0+ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band. Conclusion: Excited isoscalar 0+ states in Si28 have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry.",
author = "P. Adsley and Jenkins, {D. G.} and J. Cseh and Dimitriova, {S. S.} and Br{\"u}mmer, {J. W.} and Li, {K. C W} and Mar{\'i}n-L{\'a}mbarri, {D. J.} and K. Lukyanov and Kheswa, {N. Y.} and R. Neveling and P. Papka and L. Pellegri and V. Pesudo and Pool, {L. C.} and G. Riczu and Smit, {F. D.} and {Van Zyl}, {J. J.} and E. Zemlyanaya",
year = "2017",
month = "2",
day = "16",
doi = "10.1103/PhysRevC.95.024319",
language = "English",
volume = "95",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "2",

}

TY - JOUR

T1 - α Clustering in Si 28 probed through the identification of high-lying 0+ states

AU - Adsley, P.

AU - Jenkins, D. G.

AU - Cseh, J.

AU - Dimitriova, S. S.

AU - Brümmer, J. W.

AU - Li, K. C W

AU - Marín-Lámbarri, D. J.

AU - Lukyanov, K.

AU - Kheswa, N. Y.

AU - Neveling, R.

AU - Papka, P.

AU - Pellegri, L.

AU - Pesudo, V.

AU - Pool, L. C.

AU - Riczu, G.

AU - Smit, F. D.

AU - Van Zyl, J. J.

AU - Zemlyanaya, E.

PY - 2017/2/16

Y1 - 2017/2/16

N2 - Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as C12 and O16. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in Ca40 and neighboring nuclei and find good description within shell model, mean-field, and α-cluster models. The utility of the α-cluster description may be probed further by extending such studies to more challenging cases comprising lighter α-conjugate nuclei such as Mg24, Si28, and S32. Purpose: The purpose of this study is to look for the number and energy of isoscalar 0+ states in Si28. These states are the potential bandheads for superdeformed bands in Si28 corresponding to the exotic structures of Si28. Of particular interest is locating the 0+ bandhead of the previously identified superdeformed band in Si28. Methods: α-particle inelastic scattering from a Sinat target at very forward angles including 0 has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators. Results: Several 0+ states have been identified above 9 MeV in Si28. A newly identified 9.71 MeV 0+ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited 0+ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band. Conclusion: Excited isoscalar 0+ states in Si28 have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry.

AB - Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as C12 and O16. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in Ca40 and neighboring nuclei and find good description within shell model, mean-field, and α-cluster models. The utility of the α-cluster description may be probed further by extending such studies to more challenging cases comprising lighter α-conjugate nuclei such as Mg24, Si28, and S32. Purpose: The purpose of this study is to look for the number and energy of isoscalar 0+ states in Si28. These states are the potential bandheads for superdeformed bands in Si28 corresponding to the exotic structures of Si28. Of particular interest is locating the 0+ bandhead of the previously identified superdeformed band in Si28. Methods: α-particle inelastic scattering from a Sinat target at very forward angles including 0 has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators. Results: Several 0+ states have been identified above 9 MeV in Si28. A newly identified 9.71 MeV 0+ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited 0+ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band. Conclusion: Excited isoscalar 0+ states in Si28 have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry.

UR - http://www.scopus.com/inward/record.url?scp=85015644434&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015644434&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.95.024319

DO - 10.1103/PhysRevC.95.024319

M3 - Article

AN - SCOPUS:85015644434

VL - 95

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 2

M1 - 024319

ER -