CAJ | 학술논문

介绍了推广到晕核散射的Glauber理论，并用其研究晕核14Be的散射问题. 弹核的密度分布分别采用谐振子密度分布和相对论平均场理论计算得到具有两个晕中子结构的密度分布，对晕核模型的多重积分采用蒙特卡洛数值积分方法. 计算了不同能量下14Be，12Be与靶核12C散射的反应截面，并与实验结果进行比较，14Be的两个中子采用具有晕中子密度分布的理论计算与实验符合较好，而采用不具有晕中子密度分布的结果与实验值相差较大.
개소료추엄도훈핵산사적Glauber이론，병용기연구훈핵14Be적산사문제. 탄핵적밀도분포분별채용해진자밀도분포화상대론평균장이론계산득도구유량개훈중자결구적밀도분포，대훈핵모형적다중적분채용몽특잡락수치적분방법. 계산료불동능량하14Be，12Be여파핵12C산사적반응절면，병여실험결과진행비교，14Be적량개중자채용구유훈중자밀도분포적이론계산여실험부합교호，이채용불구유훈중자밀도분포적결과여실험치상차교대.
We introduced an extended Glauber theory for a halo nucleus scattering, where the halo nucleons and the nuclear core were treated separately. Expressions of reaction and interaction cross sections of the halo nucleus scattering were derived. We took the halo structure of the projectile nucleus into account and adopted an improved optical-limit approximation. In the framework of the extended Glauber theory, we studied the reaction cross section for the halo nucleus 14　Be scattering on a target 12　C. For comparison, the reaction cross sections of 12　Be+12C were calculated as well. The density distribution of target 12　C is taken from experiments, and those of the projectiles 12　Be and 14　Be were obtained by two methods. One is that the harmonic oscillator wave functions for 12　Be and 14　Be are used. The length of harmonic oscillator is adjusted to reproduce the reaction cross section of 12　Be+12C at the high energy E=790MeV/u. The density distribution of 14　Be was also calculated self-consistently in the relativistic mean field (RMF) theory, with a long tail wave functions for the two neutrons in 14　Be. It was found that the calculated reaction cross sections for 12　Be+12C at E=790MeV/u and E=56.5MeV/u were in good agreement with the experimental data no matter harmonic oscillator or RMF wave functions were used. In contrast, the experiments of the reaction cross sections for 14　Be+12C could only be reproduced when the wave functions of two 2s1/2 neutrons spreaded over with a long tail. It comes to a conclusion that two outside neutrons in 14　Be form a halo structure.