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用熔合蒸发反应 58Ni(2 3Na,3p) (Ein=70 Me V)和 58Ni(2 8Si,α4p) (Ein=1 30 Me V)研究了78Kr的高自旋态 ,用美国劳伦斯伯克利国家实验室的γ球测量了实验中产生的瞬时符合事件 ,对新发现的一个负宇称带用多普勒位移衰减法对 1 0 0 4 ke V(1 0 -→ 8-)和 873ke V(8-→ 6-)作了多普勒展宽谱线形状测量 .得到了负宇称带 1 0 -态能级的寿命τ=(2 .2± 0 .3) ps,8-态能级的寿命τ=(1 .6± 0 .2 ) ps.故可知此负宇称带呈现长椭形变 ,与正宇称带的扁椭形变形状共存 .
The 78Kr high spin states were investigated by the fusion evaporation reaction of 58Ni (2 3Na, 3p) (Ein = 70 MeV) and 58Ni (28Si, α4p) (Ein = 130 MeV) The ball measures the instantaneous coincidence events generated in the experiment. The newly found negative parity band was analyzed by Doppler shift-decay method with respect to 1 0 0 4 ke V (1 0 - → 8-) and 873 ke V (8- → 6 -) was used to measure the shape of Doppler broadened line, the lifetime τ = (2.2 ± 0.3) ps of the negative parity band was obtained, and the lifetime of the 8- 1 .6 ± 0 .2) ps. Therefore, we can see that this negative parity band exhibits a long oval change, coexisting with the flat oval deformation of the positive parity belt.