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arXiv 0905.2026nucl-th
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~ 3 He + α \to ~ 7 Be不对称性的测定归一化系数(核顶点常数)及其在~ 3 He(α,γ)~ 7 Be天体物理外推中的应用太阳能区的S因子

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

摘要:

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.

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