首页> 外文期刊>Astronomy and astrophysics >Effects of a revised 7Be e ?-capture rate on solar neutrino fluxes ?
【24h】

Effects of a revised 7Be e ?-capture rate on solar neutrino fluxes ?

机译:修改后的 7 是e ?捕获速率对太阳中微子通量的影响 < related-object object-type =“ tableCDS” source-id =“ http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/623/A126” source-id-type =“ url“ />

获取原文
       

摘要

Context. Electron-capture on~(7)Be is the main production channel for~(7)Li in several astrophysical environments. Theoretical evaluations have to account for not only the nuclear interaction, but also the processes in the plasma in which~(7)Be ions and electrons interact. In recent decades several estimates were presented, pointing out that the theoretical uncertainty in the rate is in general of a few percent. Aims. In the framework of fundamental solar physics, we consider a recent evaluation for the~(7)Be+e~(?)rate, which has not been used up to now, in the estimate of neutrino fluxes. Methods. We analyzed the effects of the new assumptions on standard solar models (SSMs) and compared the results obtained by adopting the revised~(7)Be+e~(?)rate to those obtained by that reported in a widely used compilation of reaction rates (ADE11). Results. We found that new SSMs yield a maximum difference in the efficiency of the~(7)Be channel of about ?4% with respect to what is obtained with the previously adopted rate. This fact affects the production of neutrinos from~(8)B, increasing the relative flux up to a maximum of 2.7%. Negligible variations are found for the physical and chemical properties of the computed solar models. Conclusions. The agreement with the Sudbury Neutrino Observatory measurements of the neutral current component of the~(8)B neutrino flux is improved.
机译:上下文。 〜(7)Be上的电子捕获是几种天体环境中〜(7)Li的主要生产渠道。理论评估不仅要考虑核相互作用,还要考虑等离子体中〜(7)Be离子与电子相互作用的过程。在最近的几十年中,提出了一些估计,指出速率的理论不确定性通常为百分之几。目的在基本太阳物理学的框架内,我们考虑对中微子通量的估计,最近对〜(7)Be + e〜(?)速率的评估,到目前为止尚未使用。方法。我们分析了新假设对标准太阳能模型(SSMs)的影响,并将采用修正后的〜(7)Be + e〜(?)速率所获得的结果与广泛使用的反应速率汇编中所报告的结果进行了比较。 (ADE11)。结果。我们发现,相对于以前采用的速率,新的SSM在〜(7)Be通道的效率上产生的最大差异约为4%。这个事实影响了〜(8)B产生的中微子,使相对通量增加到最大2.7%。发现所计算的太阳模型的物理和化学性质的变化可以忽略不计。结论。与Sudbury中微子天文台测量〜(8)B中微子通量的中性电流分量的一致性得到了改善。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号