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arXiv nucl-th/9901034nucl-th
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19 C的库仑解离

Coulomb dissociation of 19C

P. Banerjee

摘要:

我们的目标是通过研究丰中子奇异核^{19}C的库仑破裂反应来重新研究它的结构,假设它的激发是低能连续态。所使用的方法保留了与分裂碎片之间的相互作用相关的所有有限范围效应,并且可以使用现实的波函数来描述这种可能的晕核。应用该方法计算了能量低于100 MeV/nucleon的重靶上^{19}C库仑破碎后的^{18}C纵动量分布、排他中子角分布和^{19}C相对能谱。计算结果与最近可用的实验数据进行了比较。在大多数少数情况下,数据支持^{18}C(0^+)\otimes 1 s_{1/2}作为^{19}C的可能基态构型,单中子分离能为0.53 MeV。然而,现有的实验数据似乎不允许得出关于该核的基态构型的明确结论。

英文摘要:

We aim to re-investigate the structure of the neutron rich exotic nucleus ^{19}C through studies of its Coulomb breakup reactions, assuming that its excitation is to states in the low energy continuum. The method used retains all finite-range effects associated with the interactions between the breakup fragments and can use realistic wave functions for this possibly halo nucleus. We apply the method to compute the longitudinal momentum distribution of ^{18}C, exclusive neutron angular distribution and relative energy spectrum of ^{19}C following Coulomb breakup of ^{19}C on heavy targets at beam energies below 100 MeV/nucleon. The calculated results are compared with recently available experimental data. In the majority of the few cases, the data favour ^{18}C(0^+) \otimes 1s_{1/2} as the probable ground state configuration of ^{19}C, with a one-neutron separation energy of 0.53 MeV. However, it appears that the existing experimental data do not allow to draw a clear conclusion about the ground state configuration of this nucleus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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