Intruder Configurations in the A=33 isobars:: 33Mg and 33Al

被引：51

作者：

Tripathi, Vandana ^{[1
]}

Tabor, S. L. ^{[1
]}

Mantica, P. F. ^{[2
,3
]}

Utsuno, Y. ^{[4
]}

Bender, P. ^{[1
]}

Cook, J. ^{[2
]}

Hoffman, C. R. ^{[1
]}

Lee, Sangjin ^{[1
]}

Otsuka, T. ^{[5
,6
,7
]}

Pereira, J. ^{[2
]}

Perry, M. ^{[1
]}

Pepper, K. ^{[1
]}

Pinter, J. S. ^{[3
]}

Stoker, J. ^{[3
]}

Volya, A. ^{[1
]}

Weisshaar, D. ^{[2
]}

机构：

[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[2] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[3] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

[4] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[5] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[6] Univ Tokyo, Ctr Nucl Study, Tokyo 1130033, Japan

[7] RIKEN, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.101.142504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The beta decay of Mg-33 (N 21) presented in this Letter reveals intruder configurations in both the parent and the daughter nucleus. The lowest excited states in the N 20 daughter nucleus, 33Al, are found to have nearly 2p - 2h intruder configuration, thus extending the "island of inversion"' beyond Mg. The allowed direct beta-decay branch to the 5/2(+) ground state of the daughter nucleus Al-33 implies positive parity for the ground state of the parent Mg-33, contrary to an earlier suggestion of negative parity from a g-factor measurement. An admixture of 1p-1h and 3p-3h configurations is proposed for the ground state of Mg-33 to explain all of the experimental observables.

引用

页数：4

共 25 条

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