【摘 要】
：
Based on the s-process nucleosynthesis model with the 13C(α, n)16O reaction occurring under radiative conditions in the interpulse phases, we investigate the c
【机 构】
：
National Astronomical Observatories,Department of Physics,Graduate School of Chinese Academy of Scie
论文部分内容阅读
Based on the s-process nucleosynthesis model with the 13C(α, n)16O reaction occurring under radiative conditions in the interpulse phases, we investigate the characteristics of the distribution of neutron exposure in low-mass Asymptotic Giant Branch (AGB) stars.We introduce a new concept, the distribution of neutron exposures of the Galaxy (NEG), to study the chemical evolution characteristics of the Galaxy for s-process elements. Using a chemical evolution model of the Galaxy, we develop a model for the NEG and obtain the evolution results of the NEG in different epochs. The present results appear to reasonably reproduce the distribution of neutron exposures of the solar system (hereafter NES). The main component and the strong component in the NES are built up in different epochs. The strong component of the s-process is mainly synthesised in the low-mass and metal-poor AGB stars,and the main component is produced by the s-process in the low-mass AGB stars with higher metallicities.
其他文献
群众文化工作对于满足人民群众的精神生活具有非常重要的作用，特别是近年来随着我国经济的不断发展，人民生活水平的不断提升，人民群众的精神生活需求呈现不断增长的态势。本文研
A novel blue luminescent mercury ( Ⅱ ) complex of 2,6-bis ( benzimidazolyl ) pyridine (L) was synthesized. In solid state, this complex has the formula [ Hg(L)
Two new aristolane sesquiterpenes, namely, aristolan-10-ol-9-one and aristolan-8-en-1-one, were isolated from the red alga Laurencia similis. Their structures w
The anodic oxidation of caffeic acid in the presence of acetylacetone or methyl acetoacetate in aqueous solution has been studied by cyclic voltammetry and cont
Single-crystal X-ray structural analysis of K5Na5H3[Nd(α-SiW11O39)2]·6H2O(triclinic, space group P1-, a = 13.7738(10), b = 19.722(2), c = 20.6647(15) (A), α
D-InSAR is currently one of the most popular research tools in the field of Microwave Remote Sensing. It is unrivaled in its aspect of measuring ground deformat
A new series of bone affinity compounds were synthesized by linking emodin with 5-fluorouracil derivatives. Their bone affinities were established by hydroxyapa
Two new types of quantum states are constructed by applying the operator s(ξ) = exp(ξ*ab - ξa+b+) on the two-mode even and odd coherent states.The mathematic
The stability and local bifurcation of a simply-supported flexible beam (Bernoulli-Euler type) carrying a moving mass and subjected to harmonic axial excitation