Nuclear spins and moments of Ga isotopes reveal sudden structural changes between N=40 and N=50.
Nuclear spins and moments of Ga isotopes reveal sudden structural changes between N=40 and N=50.
复制标题
DOI：
10.1103/physrevlett.104.252502
复制
发表时间：
2010-06
影响因子：
8.6
通讯作者：
B. Cheal;E. Mané;J. Billowes;M. Bissell;K. Blaum;B. A. Brown;F. Charlwood;K. Flanagan;D. H. Forest;C. Geppert;M. Honma;A. Jokinen;M. Kowalska;A. Krieger;J. Krämer;I. Moore;R. Neugart;G. Neyens;W. Nörtershäuser;M. Schug;H. H. Stroke-H.;P. Vingerhoets;D. Yordanov;M. Záková
中科院分区：
文献类型：
--
作者：
B. Cheal;E. Mané;J. Billowes;M. Bissell;K. Blaum;B. A. Brown;F. Charlwood;K. Flanagan;D. H. Forest;C. Geppert;M. Honma;A. Jokinen;M. Kowalska;A. Krieger;J. Krämer;I. Moore;R. Neugart;G. Neyens;W. Nörtershäuser;M. Schug;H. H. Stroke-H.;P. Vingerhoets;D. Yordanov;M. Záková
在欧洲核子研究中心的ISOLDE对Ga （Z=31）同位素进行了共线激光光谱分析。一个充满气体的线性保罗阱（ISCOOL）被用来扩展对非常富中子同位素（N=36-50）的测量。测量到73Ga的基态自旋I=1/2，与3/2{-}异构体（75 eV > E{ex} > 1 keV）接近简并。在I=3/2的79Ga g.s中，πf{5/2}轨道上的质子占主导地位，而在81Ga中，5/2{-}能级成为g.s。我们将这些数据与f{5/2}pg{9/2}模型空间的壳层模型计算结果进行了比较，提出了进一步的理论发展和新的实验。
Collinear laser spectroscopy was performed on Ga (Z=31) isotopes at ISOLDE, CERN. A gas-filled linear Paul trap (ISCOOL) was used to extend measurements towards very neutron-rich isotopes (N=36-50). A ground state (g.s.) spin I=1/2 is measured for 73Ga, being near degenerate with a 3/2{-} isomer (75 eV≲E{ex}≲1 keV). The 79Ga g.s., with I=3/2, is dominated by protons in the πf{5/2} orbital and in 81Ga the 5/2{-} level becomes the g.s. The data are compared to shell-model calculations in the f{5/2}pg{9/2} model space, calling for further theoretical developments and new experiments.