Inverse-kinematics proton scattering on 50 Ca: determining effective charges using complementary probes
Inverse-kinematics proton scattering on 50 Ca: determining effective charges using complementary probes
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50 Ca 上的逆运动学质子散射：使用互补探针确定有效电荷
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Zegers
中科院分区：
文献类型：
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作者：
L. Riley;M. Agiorgousis;T. Baugher;D. Bazin;M. Bowry;P. Cottle;F. G. DeVone;A. Gade;M. Głowacki;K. Kemper;E. Lunderberg;D. McPherson;S. Noji;F. Recchia;B. Sadler;M. Scott;D. Weisshaar;R. Zegers
将目前的结果与先前2 +态寿命的测量结果进行比较，我们得到了0 + s中中子和质子矩阵元素的比率。！ 2 +过渡。这些结果为48 Ca附近富中子同位素的壳层模型计算提供了质子和中子有效电荷比的确定。双幻核中少数核子内的同位素为核壳层模型提供了基础。这些原子核中价核子的波函数的简单性允许确定预测激发态能量所需的两体矩阵元素和用于计算给定壳模型空间中的跃迁强度的有效电荷。有效电荷反映了价核子运动与核心核子虚激发之间耦合的强度。
A comparison of the present results with those from previous measurements of the lifetimes of the 2 + states provides us the ratio of the neutron and proton matrix elements for the 0 +.s. ! 2 + transitions. These results allow the determination of the ratio of the proton and neutron effective charges to be used in shell model calculations of neutron-rich isotopes in the vicinity of 48 Ca. Isotopes within a few nucleons of the doubly-magic nuclei provide the foundation for the nuclear shell model. The simplicity of the wavefunctions of the valence nucleons in these nuclei allows the determination of the two-body matrix elements necessary for predicting the energies of excited states and the effective charges used in calculating transition strengths in a given shell-model space. Effective charges reflect the strength of the coupling between the motion of the valence nucleons and the virtual excitations of the core nucleons.