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⁷⁶Se三声子态成员的候选者

Newly Discovered Candidate of the Member of Three-Phonon Multiplet in ⁷⁶Se

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【Author】 CHEN Yong-Bo~(1,2) SHEN Shui-Fa~(1,2,3;1)) XU Fu-Rong~3 ZHENG Shi-Jie~3 1(Key Laboratory of Nuclear Resources and Environment (East China Institute of Technology),Ministry of Education,Nanchang 330013,China) 2(School of Nuclear Engineering and Technology,East China Institute of Technology,Fuzhou 344000,China) 3(School of Physics,Peking University,Beijing 100871,China)

【机构】核资源与环境教育部重点实验室(东华理工大学)；北京大学物理学院；北京大学物理学院南昌 330013 东华理工大学核工程技术学院抚州 344000；南昌 330013 东华理工大学核工程技术学院抚州 344000 北京大学物理学院北京 100871；北京 100871；

【摘要】通过⁷⁶Br(T_1/2=16．2h)β+/EC衰变方法得到⁷⁶Br衰变纲图,并确认了Müller等通过核反应⁷⁶Se（p,p′）方法发现⁷⁶Se能级纲图中1791．31keV能级．不过,Müller等当时并没有指出该条能级的自旋和宇称,以及应该属于哪一个声子态的成员．经过分析我们认为1791．31keV能级可以作为⁷⁶Se三声子态的一个候选成员．此外,为了研究这个介于强形变和球形核之间的过渡区核的形变,对它的正宇称态进行了采用推转壳模型形式的总转动能面计算．更多还原

【Abstract】 The decay scheme of ⁷⁶Br is obtained by the ⁷⁶Br (T_1/2=16.2h)β⁺/EC approach.And the 1791.31keV level,which was identified firstly by Müller et al by the ⁷⁶Se （p,p′） approach several years ago,is reconfirmed.However, Müller et al did not point out the spin and parity of this level,and which phonon multiplet it should be belong to. Now we consider the assertion that this level is assigned as a new candidate of the three-phonon multiplet in ⁷⁶Se is reasonable.In addition,for researching deformation of ⁷⁶Se which lies in the transitional region of strong deformed and spherical nuclei,we calculate the total Routhian surfaces （TRS） of positive-parity states by cranking shell model formalism.更多还原