New lifetime measurement for the 21+ level in Sn 112 by the Doppler-shift attenuation method
New lifetime measurement for the 21+ level in Sn 112 by the Doppler-shift attenuation method
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通过多普勒频移衰减法测量 Sn 112 中 21 能级的新寿命
DOI：
10.1103/physrevc.103.034315
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发表时间：
2021
影响因子：
3.1
通讯作者：
et. al.
中科院分区：
文献类型：
--
作者：
Kundu A.;Laskar Md. S. R.;Palit R.;Raut R.;Santra S.;Shimizu N.;Togashi T.;Ideguchi E.;et. al.
原子核中的能级被入射粒子的非弹性散射激发。本文用改进的方法分析了能级衰变产生的多普勒效应射线峰，提取了能级寿命和相应的电四极跃迁几率。目前的结果是不一致的，从现有的寿命测量报告的结果，但符合独立的系统测量的low-lyingtransition强度在稳定的均匀质量的Sn同位素，由纯库仑激发以及重离子诱导的非弹性碰撞。转移概率也证实了增强集体的水平，并被发现是在良好的协议与广义资历模型（GSM），以及国家的最先进的蒙特卡罗壳模型（MCSM）计算。在MCSM方案的范围内，增强被理解为扁圆形变形的两个和状态inarising由于强质子核心激发和增强的质子-中子相互作用。此外，还得到了能级寿命和跃迁几率的极限。
Levels in thenucleus have been excited by inelastic scattering withprojectile at. The Doppler affected-ray peak arising from the decay of thelevel has been analyzed, using updated methodologies, to extract the level lifetime and corresponding electric quadrupole () transition probability,. The present result is discrepant with respect to the results reported from existing lifetime measurements, but in compliance with independent systematic measurements of the low-lyingtransition strengths in the stable even-mass Sn isotopes, by pure Coulomb excitation as well as heavy-ion induced inelastic collisions. The transition probability also confirms an enhancement in collectivity for thelevel, and is found to be in good agreement with generalized seniority model (GSM) as well as state-of-the-art Monte Carlo shell model (MCSM) calculations. Within the realm of the MCSM scheme, the enhancement is understood in terms of oblate deformations for both theandstates inarising due to strong proton-core excitations and enhanced proton-neutron interactions. In addition, limits for the lifetime of thelevel and thetransition probability,, have been obtained.