论文标题
$^7 $ be（$α，γ$）$^{11} $ c在中微子驱动的风核合成的$^7 $中的共鸣的第一反向运动学测量
First inverse kinematics measurement of resonances in $^7$Be($α,γ$)$^{11}$C relevant to neutrino-driven wind nucleosynthesis using DRAGON
论文作者
论文摘要
在银河系中解释光$ p $ nuclei的起源的一种可能机制是通过$νp$ - 过程中核心偏移超新星的核中微子驱动的弹出弹出的核合成。但是，这种生产方案对潜在的超新星动力学和核物理学输入非常敏感。就核不确定性而言，通过$^7 $ be（$α，γ$）$^{11} $ C反应从$ pp $ chains的突破已被确定为一种重要链接，可以影响核流，因此$νp$ - 程序的效率。但是，其反应速率在相关温度范围内众所周知，t = 1.5-3 Gk。我们报告了第一个直接测量$^7 $ be（$α，γ$）$^{11} $ c反应的两种共振，并使用ISAC设施中的强烈放射性$^7 $ BE BEAM与以前未知的强度进行反应，而在非运动动力学中的Dragon Aciole Spairator。我们已经将$^7 $ be（$α，γ$）$^{11} $ c反应速率不确定性降低到$ \ sim $ 9.4-10.7％，比相关温度区域比。
A possible mechanism to explain the origin of the light $p$-nuclei in the Galaxy is the nucleosynthesis in the proton-rich neutrino-driven wind ejecta of core-collapse supernovae via the $νp$-process. However this production scenario is very sensitive to the underlying supernova dynamics and the nuclear physics input. As far as the nuclear uncertainties are concerned, the breakout from the $pp$-chains via the $^7$Be($α,γ$)$^{11}$C reaction has been identified as an important link which can influence the nuclear flow and therefore the efficiency of the $νp$-process. However its reaction rate is poorly known over the relevant temperature range, T = 1.5-3 GK. We report on the first direct measurement of two resonances of the $^7$Be($α,γ$)$^{11}$C reaction with previously unknown strengths using an intense radioactive $^7$Be beam from the ISAC facility and the DRAGON recoil separator in inverse kinematics. We have decreased the $^7$Be($α,γ$)$^{11}$C reaction rate uncertainty to $\sim$ 9.4-10.7% over the relevant temperature region.
