恒星核心氦核反应系统中的振荡

Oscillations in core nuclear reaction system

分析了在压力效应和ｇ－Ｔ效应影响下，恒星核心氦核反应系统中与粒子数密度有关的振荡．结果表明，氦核反应系统中存在超临界的时间振荡分支．当核反应发生在对流区，且对流速度沿径向减小时，压力效应可激发振荡；在核反应发生在对流区或非对流区的一般情况下，ｇ－Ｔ效应可以激发振荡．这类振荡将导致能量产生的时间变化．

Oscillations related to the particle number density in the core nuclear reaction system are investigated, including the oscillations in the helium nuclear reaction under the influence of (gT) effect and pressure effect. It is shown that there are supercritical oscillating bifurcations with time in the core system. If the oscillations are excited by pressure effect, the nuclear reaction may occur in the convection zone with a radially reducing convective velocity. But if the oscillations are excited by (gT) effect, the nuclear reaction may occur in the either convection zone or nonconvection zone.