Determination of the 3He+alpha\to 7Be asymp. normalization coefficients (nucl. vertex constants) and their application for extrapolation of the 3He(alpha,gamma)7Be astroph. S-factors to the solar energy region
S. B. Igamov, Q. I. Tursunmahatov, R. Yarmukhamedov
直接俘获$^3He(α,γ)^7{\rm {Be}}$反应的现代精确测量的天体物理$S$因子的新分析[B. S. Nara Singh { \it et al.},Phys.Rev.Lett. { \bf 93},262503(2004); D. Bemmerer { \it等},Phys.Rev.Lett. { \bf 97},122502(2006); F.Confortola { \it等},Phys.Rev.C { \bf 75},065803(2007),T.A.D.Brown { \it等人},Phys.Rev. C { \bf 76},055801(2007)和A Di Leva,{ \it等人},Phys.Rev.Lett. { \bf 102},232502(2009)]填充到$^7{\rm Be}$的基态和第一激发态的方法是基于改进的二体势方法进行的。本文对间接测定的$^{\glqq}$的渐近归一化常数($^3{\rm {He}}+α\to{\rm {^7Be}}$的核顶点常数)(g.s.)和$^3{\rm {He}}+α\to{\rm {^7Be}}$(0.429 MeV)以及在E $\le$ 90 keV时的天体物理$S$因子$S_{34}(E)$,包括$E$ =0。渐近归一化常数的值已被用于获得有关的$α$ -粒子的反射镜(${\rm{^7Li}}{\rm {^7Be}}$)对的光谱因子的信息。
英文摘要:
A new analysis of the modern precise measured astrophysical $S$ factors for the direct capture $^3He(α,γ)^7{\rm {Be}}$ reaction [B.S. Nara Singh {\it et al.}, Phys.Rev.Lett. {\bf 93}, 262503 (2004); D. Bemmerer {\it et al.}, Phys.Rev.Lett. {\bf 97}, 122502 (2006); F.Confortola {\it et al.}, Phys.Rev.C {\bf 75}, 065803 (2007), T.A.D.Brown {\it et al.}, Phys.Rev. C {\bf 76}, 055801 (2007) and A Di Leva, {\it et al.},Phys.Rev.Lett. {\bf 102}, 232502 (2009)] populating to the ground and first excited states of $^7{\rm Be}$ is carried out based on the modified two - body potential approach. New estimates are obtained for the $^{\glqq}$indirectly determined\grqq\, values of the asymptotic normalization constants (the nuclear vertex constants) for $^3{\rm {He}}+α\to{\rm {^7Be}}$(g.s.) and $^3{\rm {He}}+α\to{\rm {^7Be}}$(0.429 MeV) as well as the astrophysical $S$ factors $S_{34}(E)$ at E$\le$ 90 keV, including $E$=0. The values of asymptotic normalization constants have been used for getting information about the $α$-particle spectroscopic factors for the mirror (${\rm{^7Li}}{\rm {^7Be}}$)-pair.
Dispersion (asymptotic) theory of charged particle transfer reactions at low energies and nuclear astrophysics: II. the asymptotic normalization coefficients and their nuclear-astrophysical application
Study of the nucleon radiative captures 8Li(n,gamma)9Li, 9Be(p,gamma)10B, 10Be(n,gamma)11Be, 10B(p,gamma)11C, and 16O(p,gamma)17F at thermal and astrophysical energies
我们研究了中子俘获反应8Li(n,γ)9 Li及其在原始核合成中的作用。n + 8Li -> 9 Li + γ反应具有重要的天体物理学意义,因为它包括宇宙原始核合成过程链和II型超新星热核反应的变体之一。
Asymptotic normalization coefficients for ${\rm {^7Be}}+p\to{\rm{^8B}}$ from the peripheral ${\rm{^7Be}}$($d$,$n$)${\rm{^8B}}$ reaction and their astrophysical application
Effects of nuclear molecular configurations on the astrophysical S-factor for $^{16}$O + $^{16}$O
在基于Woods-Saxon势的双中心壳层模型下,研究了核分子构型对$^{16}$ O + $^{16}$ O的天体物理S因子的影响.这些分子效应指的是相互作用的核之间的颈部和径向依赖的集体质量参数的形成。它表明,前者是至关重要的解释目前的实验数据具有高精度,没有任何自由参数,而另外,后者预测一个明显的最大值的S-因子。与Jiang等人最近的结果相反,当能量降低时,S因子不会向极低值下降。