Study of Ground State Wave-function of the Neutron-rich 29,30 Na Isotopes through Coulomb Breakup
Study of Ground State Wave-function of the Neutron-rich 29,30 Na Isotopes through Coulomb Breakup
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通过库仑破裂研究富中子29,30 Na同位素的基态波函数
DOI：
10.1051/epjconf/20146602087
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发表时间：
2014
影响因子：
--
通讯作者：
Rahaman A
中科院分区：
文献类型：
--
作者：
Rahaman A
本文研究了能量分别为434 MeV/核子和409 MeV/核子的不稳定丰中子核29，30 Na在“反转岛”附近的库仑破裂。同时测量了碎片、受激抛射体产生的衰变中子和受激碎片库仑破碎后发射的γ射线的四个动量矢量。对于这些核，在一个中子阈值以上的低偶极子强度可以用直接破裂模型来解释。对29，30 Na库仑破裂的分析表明，大量的碰撞截面产生了基态的28 Na，29 Na核。29，30 Na的基态构型分别为28 Na（g.s）π νs1/2和29 Na（g.s）π νs1/2。
Coulomb breakup of unstable neutron rich nuclei29,30Naaround the ‘island of inversion’ has been studied at energy around 434 MeV/nucleon and 409 MeV/nucleon respectively. Four momentum vectors of fragments, decay neutron from excited projectile andγ-rays emitted from excited fragments after Coulomb breakup are measured in coincidence. For these nuclei, the low-lying dipole strength above one neutron threshold can be explained by direct breakup model. The analysis for Coulomb breakup of29,30Nashows that large amount of the cross section yields the28Na,29Nacore in ground state. The predominant ground-state configuration of29,30Na is found to be28Na(g.s)⊗νs1/2and29Na(g.s)⊗νs1/2,respectively.