| Lifetimes of Excited Levels in ^131Ce |
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| 作者姓名： | 李广生 孟锐 竺礼华 张振龙 王月 王治民 温书贤 陆景彬 赵广义 李险峰 文立军 郑永男 郑勇 刘运祚 袁观俊 杨春祥 |
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| 作者单位： | [1]ChinaInstituteofAtomicEnergy,Beijing102413 [2]DepartmentofPhysics,JilinUniversity,Changchun130023 [3]InstituteofModernPhysics,ChineseAcademyofSciences,Lanzhou730000 |
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| 摘 要： | The fusion-evaporation reaction ^116Sn (^19F, p3n)^131 Ce at projectile energy of 95 MeV is used to populate high spin states in ^131Ce. The de-exciting γ-rays are detected in γ-γ coincidence measurement with Compton-suppressed BGO-HPGe detectors. Level lifetimes of ^131 Ce were determined by using the Doppler shift attenuation method.The experimental results indicate that collectivity of ^131 Ce is reduced relative to that of ^130Ce and it follows that deformation decreases with increase of the neutron number on the basis of systematic comparison of transition quadrupole moments for the light cerium isotopes.
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| 关 键 词： | 铈原子 受激层 寿命 自旋态 原子核物理 铈同位素 |
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