Rudolph D, Baktash C, Devlin M, LaFosse D R, Riedinger L L, Sarantites D G, Yu C H
Department of Physics, Lund University, Sweden.
Phys Rev Lett. 2001 Feb 19;86(8):1450-3. doi: 10.1103/PhysRevLett.86.1450.
Two excited well-deformed bands have been observed in the semi-magic nucleus (58)Ni. One of the bands was observed to partially decay by emission of a prompt discrete alpha particle that feeds the 2949 keV 6(+) spherical yrast state in the daughter nucleus (54)Fe. This constitutes the first observation of prompt alpha emission from states lying in the deformed secondary minimum of the nuclear potential. gamma-ray linking transitions via several parallel paths establish the spin, parity, and excitation energy of this deformed band in (58)Ni.
在半幻核(^{58}Ni)中观测到了两个激发的变形带。其中一个带被观测到通过发射一个瞬发分立α粒子而部分衰变，该α粒子馈入子核(^{54}Fe)中能量为(2949 keV)的(6^+)球形yrast态。这是首次观测到来自位于核势变形第二极小值处的态的瞬发α发射。通过几条平行路径的γ射线连接跃迁确定了(^{58}Ni)中这个变形带的自旋、宇称和激发能。
