neutron density

The abundance of H and heavy element in H-burning shell and neutron density and heavy element in He-burning shell are all reduced, but the abundance of the He is increased;

氢壳层内部氢和重元素及氦壳层内的中子数和重元素的丰度偏低，而氦元素丰度偏高；

Analysis of the Stable Neutron Density of Reactor with Extraneous Neutron Source

对有外加中子源时反应堆中子密度稳定值的分析

Through the analysis of the stable neutron density of the subcritical reactor with extraneous neu-tron source, this paper proves that the formula of neutron multiplication with delayed neutron is of great use in the analysis of the subcritical reactor physics.

本文主要内容是通过对有外加中子源反应堆次临界状态下中子密度稳定值的分析，说明考虑缓发中子在内的中子倍增公式对次临界状态的反应堆物理分析是很有用的。