Toward the limit of nuclear binding on the N=Z line: Spectroscopy of Cd96

Toward the limit of nuclear binding on the N=Z line: Spectroscopy of Cd96
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DOI：
10.1103/physrevc.99.021302
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发表时间：
2019-02
期刊：
Physical Review C
影响因子：
3.1
通讯作者：
P. Davies;J. Park;H. Grawe;R. Wadsworth;R. Gernhäuser;R. Krücken;F. Nowacki;D. Ahn;F. Ameil;H. Baba;T. Bäck;B. Blank;A. Blazhev;P. Boutachkov;F. Browne;I. Čeliković;M. Dewald;P. Doornenbal;T. Faestermann;Y. Fang;N. Fukuda;A. Gengelbach;J. Gerl;J. Giovinazzo;S. Go;N. Goel;M. Górska;E. Gregor;H. Hotaka;S. Ilieva;N. Inabe;T. Isobe;D. Jenkins;J. Jolie;H. Jung;A. Jungclaus;D. Kameda;G. Kim;Y. K. Kim;I. Kojouharov;T. Kubo;N. Kurz;M. Lewitowicz;G. Lorusso;D. Lubos;L. Maier;E. Merchán;K. Moschner;D. Murai;F. Naqvi;H. Nishibata;D. Nishimura;S. Nishimura;I. Nishizuka;Z. Patel;N. Pietralla;M. Rajabali;S. Rice;H. Sakurai;H. Schaffner;Y. Shimizu;L. Sinclair;P. Söderström;K. Steiger;T. Sumikama;H. Suzuki;H. Takeda;J. Taprogge;P. Thöle;S. Valder;Z. Wang;N. Warr;H. Watanabe;V. Werner;Jinguang Wu;Z. Xu;A. Yagi;K. Yoshinaga;Y. Zhu
P. Davies;J. Park;H. Grawe;R. Wadsworth;R. Gernhäuser;R. Krücken;F. Nowacki;D. Ahn;F. Ameil;H. Baba;T. Bäck;B. Blank;A. Blazhev;P. Boutachkov;F. Browne;I. Čeliković;M. Dewald;P. Doornenbal;T. Faestermann;Y. Fang;N. Fukuda;A. Gengelbach;J. Gerl;J. Giovinazzo;S. Go;N. Goel;M. Górska;E. Gregor;H. Hotaka;S. Ilieva;N. Inabe;T. Isobe;D. Jenkins;J. Jolie;H. Jung;A. Jungclaus;D. Kameda;G. Kim;Y. K. Kim;I. Kojouharov;T. Kubo;N. Kurz;M. Lewitowicz;G. Lorusso;D. Lubos;L. Maier;E. Merchán;K. Moschner;D. Murai;F. Naqvi;H. Nishibata;D. Nishimura;S. Nishimura;I. Nishizuka;Z. Patel;N. Pietralla;M. Rajabali;S. Rice;H. Sakurai;H. Schaffner;Y. Shimizu;L. Sinclair;P. Söderström;K. Steiger;T. Sumikama;H. Suzuki;H. Takeda;J. Taprogge;P. Thöle;S. Valder;Z. Wang;N. Warr;H. Watanabe;V. Werner;Jinguang Wu;Z. Xu;A. Yagi;K. Yoshinaga;Y. Zhu
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
P. Davies;J. Park;H. Grawe;R. Wadsworth;R. Gernhäuser;R. Krücken;F. Nowacki;D. Ahn;F. Ameil;H. Baba;T. Bäck;B. Blank;A. Blazhev;P. Boutachkov;F. Browne;I. Čeliković;M. Dewald;P. Doornenbal;T. Faestermann;Y. Fang;N. Fukuda;A. Gengelbach;J. Gerl;J. Giovinazzo;S. Go;N. Goel;M. Górska;E. Gregor;H. Hotaka;S. Ilieva;N. Inabe;T. Isobe;D. Jenkins;J. Jolie;H. Jung;A. Jungclaus;D. Kameda;G. Kim;Y. K. Kim;I. Kojouharov;T. Kubo;N. Kurz;M. Lewitowicz;G. Lorusso;D. Lubos;L. Maier;E. Merchán;K. Moschner;D. Murai;F. Naqvi;H. Nishibata;D. Nishimura;S. Nishimura;I. Nishizuka;Z. Patel;N. Pietralla;M. Rajabali;S. Rice;H. Sakurai;H. Schaffner;Y. Shimizu;L. Sinclair;P. Söderström;K. Steiger;T. Sumikama;H. Suzuki;H. Takeda;J. Taprogge;P. Thöle;S. Valder;Z. Wang;N. Warr;H. Watanabe;V. Werner;Jinguang Wu;Z. Xu;A. Yagi;K. Yoshinaga;Y. Zhu

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在 96Cd 中发现了 γ 衰变异构态（τ1/2=197+19−17 ns），它距离最后一个已知的 N=Z 原子核 100Sn 仅有一个 α 粒子。将结果与壳模型计算进行比较，可以推导出一个试验性的实验水平方案，并将异构体解释为基于等标量（T = 0）和等矢量（T = 1）中子-质子对耦合的中等自旋负宇称自旋陷阱。这些数据还提供了 9+ T=1 状态人口的证据，通过壳模型计算预测该状态为 yrast。这种低位 T=1 态在质量较轻的偶偶自共轭原子核中是未知的，也可以用 T=0 和 T=1 中子-质子对的耦合来解释。
A γ-decaying isomeric state (τ1/2=197+19−17 ns) has been identified in 96Cd, which is one α particle away from the last known bound N=Z nucleus, 100Sn. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T=0) and isovector (T=1) neutron-proton pairs. The data also suggest evidence for the population of a 9+ T=1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T=1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T=0 and T=1 neutron-proton pairs.