CAJ | 학술논문

在中国原子能科学研究院H-13串列加速器上,通过重离子核反应122Sn(16O,4n)对A=130缺中子核区的134Ce核的高自旋态进行了研究,建立了134Ce的新的能级纲图,最高自旋态扩展到22(h). 然而实验结果与近期发表的134Ce核的高自旋态结果不同,所谓在134Ce核中存在的磁转动带结构不能被实验证实. 对实验结果的分析表明,134Ce核的高自旋态结构呈现出重要的形状共存特性: 在基带以上的回弯处的10+态起源于两个中子组态,基于此10+态的转动带具有γ≈-60°的扁椭形变; 另一个10+同质异能态为yrast陷阱,也起源于两中子组态,为具有γ≈-120°的长椭形状; 而由两个signature伙伴带组成的强耦合带,则起源于h11/2与g7/2质子组态,为具有γ≈0°的长椭形变带.
재중국원자능과학연구원H-13천렬가속기상,통과중리자핵반응122Sn(16O,4n)대A=130결중자핵구적134Ce핵적고자선태진행료연구,건립료134Ce적신적능급강도,최고자선태확전도22(h). 연이실험결과여근기발표적134Ce핵적고자선태결과불동,소위재134Ce핵중존재적자전동대결구불능피실험증실. 대실험결과적분석표명,134Ce핵적고자선태결구정현출중요적형상공존특성: 재기대이상적회만처적10+태기원우량개중자조태,기우차10+태적전동대구유γ≈-60°적편타형변; 령일개10+동질이능태위yrast함정,야기원우량중자조태,위구유γ≈-120°적장타형상; 이유량개signature화반대조성적강우합대,칙기원우h11/2여g7/2질자조태,위구유γ≈0°적장타형변대.
High spin states in 134Ce nucleus have been studied by using the heavy-ion induced reaction 122Sn(16O,4n) carried out at China Institute of Atomic Energy. The early level scheme has been extended with spin up to 22(h). However,our result is different from that in a recent publication,and the magnetic rotation bands reported there have not been confirmed. Our observed level structures may be interpreted as shape coexistence. The 10+ state at the backbending with h11/2 quasineutron configuration has an oblate deformation with an asymmetry parameter γ≈-60°(Lund convention),and the 10+ isomer is a yrast trap of prolate deformation with γ≈-120°,whereas the other signature partner bands with h11/2 and g7/2 proton configuration probably have a prolate deformation with γ≈0°.