73Ga的库仑激发
核实验
2010-12-28 v3
摘要
利用REX-ISOLDE在线同位素质量分离器提供的后加速71,73Ga束流，在2.95 MeV/核子的安全能量下进行了库仑激发实验，推导出了71Ga和73Ga中跃迁的B(E2; Ii -> If)值。发射的伽马射线由MINIBALL探测器阵列探测，B(E2; Ii->If)值根据归一化到120Sn靶中2+ -> 0+跃迁已知强度的产额获得。将这些新结果与中子数较少的镓同位素数据进行比较表明，当中子数超过N = 40时，E2集体性向更低激发能转移。这支持了先前对镓同位素研究的结论，即在该同位素链中，N = 40和N = 42之间存在结构变化。结合近期利用共线激光谱学测量得到的基态自旋宇称为1/2-的结果，提取的证据揭示了73Ga42基态附近存在一个能量差至多为0.8 keV的1/2-; 3/2-双重态。
引用
@article{arxiv.1010.2613,
title = {Coulomb excitation of 73Ga},
author = {J. Diriken and I. Stefanescu and D. Balabanski and N. Blasi and A. Blazhev and N. Bree and J. Cederkäll and T. E. Cocolios and T. Davinson and J. Eberth and A. Ekström and D. V. Fedorov and V. N. Fedosseev and L. M. Fraile and S. Franchoo and G. Georgiev and K. Gladnishki and M. Huyse and O. V. Ivanov and V. S. Ivanov and J. Iwanicki and J. Jolie and T. Konstantinopoulos and Th. Kröll and R. Krücken and U. Köster and A. Lagoyannis and G. Lo Bianco and P. Maierbeck and B. A. Marsh and P. Napiorkowski and N. Patronis and D. Pauwels and P. Reiter and M. Seliverstov and G. Sletten and J. Van de Walle and P. Van Duppen and D. Voulot and W. B. Walters and N. Warr and F. Wenander and K. Wrzosek},
journal= {arXiv preprint arXiv:1010.2613},
year = {2010}
}