论文标题
$ e _ {\ mathrm {c.m。}} = 323 $ keV共振的新测量
New measurement of the $E_{\mathrm{c.m.}}=323$ keV resonance in the $^{19}$F$($p,γ$)$^{20}$Ne reaction
论文作者
论文摘要
在低于0.1 GK的温度下，$^{19} $ f $（p，γ）^{20} $ ne反应是CNO循环中唯一的突破路径。从技术角度来看，由于$^{19} $ f $（p，α）^{16} $ o反应渠道，该反应的实验研究从技术角度挑战。在这里，我们介绍了$^{19} $ f $（p，γ）^{20} $ ne反应的首次反向运动学研究，其中我们测量了323-keV共振的强度。我们发现强度值为$ωγ= 3.3^{+1.1} _ { - 0.9} $ MEV，这比最新的研究大两个。差异可能是直接向基态转变的结果，而先前的研究对此不敏感。我们还观察到过渡到第一个$ 2^{ - } $状态，在先前的研究中，这种共鸣尚未观察到。计算新的热核反应速率并将其与文献进行比较。
At temperatures below 0.1 GK the $^{19}$F$(p,γ)^{20}$Ne reaction is the only breakout path out of the CNO cycle. Experimental studies of this reaction are challenging from a technical perspective due to copious $γ$-ray background from the far stronger $^{19}$F$(p,α)^{16}$O reaction channel. Here we present the first inverse kinematics study of the $^{19}$F$(p,γ)^{20}$Ne reaction, in which we measure the strength of the 323-keV resonance. We find a strength value of $ωγ= 3.3^{+1.1}_{-0.9}$ meV, which is a factor of two larger than the most recent previous study. The discrepancy is likely the result of a direct to ground state transition which previous studies were not sensitive to. We also observe the transition to the first $2^{-}$ state, which has not been observed for this resonance in previous studies. A new thermonuclear reaction rate is calculated and compared with the literature.
