基于原子核壳层模型,分析了在强磁场作用下中子星壳层中的β衰变率,并以反应^63Co(β^-)^63Ni为例作详细计算.结果表明:弱磁场对中子星壳层中的β衰变几乎没有影响,强磁场(B>10^8T)使β衰变率显著增大;同时在相同的磁场强度下,基态的β衰变比激发态的β衰变所受影响更大.这些结论对进一步研究中子星晚期演化和双中子星系统快中子俘获过程的核合成是有意义的.
Based on the shell model of nuclei,β decay in the strong magnetic field of the crtusts of neutron stars is analyzed. The reaction ^63Co(β^-)^63Ni is investigated as an example, The results show that a weak magnetic field makes little effect onβ decay but a strong magnetic field ( B 〉 10^8 T) improves the rates ofβ decay obviously and the effect of magnetic field on groundβ decay is larger than those of excitedβ decay. The conclusion derived may be crucial to research late evolution of neutron stars and nucleosynthesis in r-process.