First observation of the ν 9/2 [404] orbital in the A ∼ 100 mass region

被引：45

作者：

Urban, W

Pinston, JA

Rzaca-Urban, T

Zlomaniec, A

Simpson, G

Durell, JL

Phillips, WR

Smith, AG

Varley, BJ

Ahmad, I

Schulz, N

机构：

[1] Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland

[2] Univ Grenoble 1, Inst Sci Nucl, F-38026 Grenoble, France

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[4] Univ Manchester, Schuster Lab, Dept Phys & Astron, Manchester M13 9PL, Lancs, England

[5] Argonne Natl Lab, Argonne, IL 60439 USA

[6] Inst Rech Subatom, UMR7500, CNRS, IN2P3, F-67037 Strasbourg, France

[7] Univ Strasbourg 1, F-67037 Strasbourg, France

来源：

EUROPEAN PHYSICAL JOURNAL A | 2003年 / 16卷 / 01期

关键词：

D O I：

10.1140/epja/i2002-10104-y

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A new band, populated by the spontaneous fission of Cm-248 and studied by means of prompt gamma-ray spectroscopy using the EUROGAM2 array, was observed in Zr-99. The 1038.8 keV band head with a half-life T-1/2 = 54(10) ns is interpreted as a K-isomer, corresponding to the 9/2[404] neutron-hole excitation. It is the first observation of this orbital in the mass A similar to 100 region. The quadrupole moment, Q(0) = 3.9(3) eb deduced for the new band indicates a large deformation of beta(2) = 0.41, which is produced by a specific shape-coexistence mechanism, known in other regions and now found in the A similar to 100 nuclei.

引用

页码：11 / 15

页数：5

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