Cross-shell excitations in 30Al and 30Si at high spin

D. Steppenbeck; A. N. Deacon; S. J. Freeman; R. V F Janssens; M. P. Carpenter; C. R. Hoffman; B. P. Kay; T. Lauritsen; C. J. Lister; D. O'Donnell; J. Ollier; D. Seweryniak; J. F. Smith; K. M. Spohr; S. L. Tabor; V. Tripathi; P. T. Wady; S. Zhu

doi:10.1016/j.nuclphysa.2010.07.010

Cross-shell excitations in 30Al and 30Si at high spin

D. Steppenbeck, A. N. Deacon, S. J. Freeman, R. V F Janssens, M. P. Carpenter, C. R. Hoffman, B. P. Kay, T. Lauritsen, C. J. Lister, D. O'Donnell, J. Ollier, D. Seweryniak, J. F. Smith, K. M. Spohr, S. L. Tabor, V. Tripathi, P. T. Wady, S. Zhu

Research output: Contribution to journal › Article › peer-review

Abstract

Yrast and near-yrast states in 30Al and 30Si have been populated to high spin with the 18O+14C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J~9h{stroke} at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the 0f7/2 orbital play a significant role at high spin. © 2010 Elsevier B.V.

Original language	English
Pages (from-to)	149-167
Number of pages	18
Journal	Nuclear Physics A
Volume	847
Issue number	3-4
DOIs	https://doi.org/10.1016/j.nuclphysa.2010.07.010
Publication status	Published - 8 Dec 2010

Keywords

30Al
30Si
Comparison with shell-model calculations
Deduced
Measured
Nuclear reactions

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nuclphysa.2010.07.010

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Steppenbeck, D., Deacon, A. N., Freeman, S. J., Janssens, R. V. F., Carpenter, M. P., Hoffman, C. R., Kay, B. P., Lauritsen, T., Lister, C. J., O'Donnell, D., Ollier, J., Seweryniak, D., Smith, J. F., Spohr, K. M., Tabor, S. L., Tripathi, V., Wady, P. T., & Zhu, S. (2010). Cross-shell excitations in 30Al and 30Si at high spin. Nuclear Physics A, 847(3-4), 149-167. https://doi.org/10.1016/j.nuclphysa.2010.07.010

@article{8271c3a54aac4a7eb244652bce599bc7,

title = "Cross-shell excitations in 30Al and 30Si at high spin",

abstract = "Yrast and near-yrast states in 30Al and 30Si have been populated to high spin with the 18O+14C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J~9h{stroke} at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the 0f7/2 orbital play a significant role at high spin. {\textcopyright} 2010 Elsevier B.V.",

keywords = "30Al, 30Si, Comparison with shell-model calculations, Deduced, Measured, Nuclear reactions",

author = "D. Steppenbeck and Deacon, {A. N.} and Freeman, {S. J.} and Janssens, {R. V F} and Carpenter, {M. P.} and Hoffman, {C. R.} and Kay, {B. P.} and T. Lauritsen and Lister, {C. J.} and D. O'Donnell and J. Ollier and D. Seweryniak and Smith, {J. F.} and Spohr, {K. M.} and Tabor, {S. L.} and V. Tripathi and Wady, {P. T.} and S. Zhu",

year = "2010",

month = dec,

day = "8",

doi = "10.1016/j.nuclphysa.2010.07.010",

language = "English",

volume = "847",

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journal = "Nuclear Physics A",

publisher = "Elsevier BV",

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Steppenbeck, D, Deacon, AN, Freeman, SJ, Janssens, RVF, Carpenter, MP, Hoffman, CR, Kay, BP, Lauritsen, T, Lister, CJ, O'Donnell, D, Ollier, J, Seweryniak, D, Smith, JF, Spohr, KM, Tabor, SL, Tripathi, V, Wady, PT & Zhu, S 2010, 'Cross-shell excitations in 30Al and 30Si at high spin', Nuclear Physics A, vol. 847, no. 3-4, pp. 149-167. https://doi.org/10.1016/j.nuclphysa.2010.07.010

TY - JOUR

T1 - Cross-shell excitations in 30Al and 30Si at high spin

AU - Steppenbeck, D.

AU - Deacon, A. N.

AU - Freeman, S. J.

AU - Janssens, R. V F

AU - Carpenter, M. P.

AU - Hoffman, C. R.

AU - Kay, B. P.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - O'Donnell, D.

AU - Ollier, J.

AU - Seweryniak, D.

AU - Smith, J. F.

AU - Spohr, K. M.

AU - Tabor, S. L.

AU - Tripathi, V.

AU - Wady, P. T.

AU - Zhu, S.

PY - 2010/12/8

Y1 - 2010/12/8

N2 - Yrast and near-yrast states in 30Al and 30Si have been populated to high spin with the 18O+14C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J~9h{stroke} at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the 0f7/2 orbital play a significant role at high spin. © 2010 Elsevier B.V.

AB - Yrast and near-yrast states in 30Al and 30Si have been populated to high spin with the 18O+14C fusion-evaporation reaction in inverse kinematics. The level schemes for these two isobars have been extended up to J~9h{stroke} at 9.4 and 15.5 MeV, respectively. Their decay schemes indicate that cross-shell excitations dominate at high spin, where negative-parity structures exist. Positive-parity states are compared to the results of shell-model calculations using the USD, USDA, and USDB effective interactions. The negative-parity levels are compared to predictions of the WBP interaction and the recently-developed WBP-a Hamiltonian, by allowing 1p-1h excitations to fp-shell orbitals. The results suggest that single-neutron excitations to the 0f7/2 orbital play a significant role at high spin. © 2010 Elsevier B.V.

KW - 30Al

KW - 30Si

KW - Comparison with shell-model calculations

KW - Deduced

KW - Measured

KW - Nuclear reactions

U2 - 10.1016/j.nuclphysa.2010.07.010

DO - 10.1016/j.nuclphysa.2010.07.010

M3 - Article

VL - 847

SP - 149

EP - 167

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 3-4

ER -

Cross-shell excitations in 30Al and 30Si at high spin

Abstract

Keywords

UN SDGs

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