15O(alpha,gamma)19Ne breakout reaction and impact on X-ray bursts.
作者： W. P. Tan , J. L. Fisker , J. Görres , M. Couder , M. Wiescher
DOI: 10.1103/PHYSREVLETT.98.242503
关键词: Physics 、 Amplitude 、 Atomic physics 、 CNO cycle 、 Branching fraction 、 Alpha decay 、 X-ray
摘要: The breakout reaction $^{15}\mathrm{O}(\ensuremath{\alpha},\ensuremath{\gamma})^{19}\mathrm{Ne}$, which regulates the flow between hot CNO cycle and $rp$ process, is critical for explanation of burst amplitude periodicity x-ray bursters. We report on first successful measurement $\ensuremath{\alpha}$-decay branching ratios relevant states in $^{19}\mathrm{Ne}$ populated via $^{19}\mathrm{F}(^{3}\mathrm{He},t)^{19}\mathrm{Ne}$. Based experimental results our previous lifetime measurements these states, we derive rate $^{15}\mathrm{O}(\ensuremath{\alpha},\ensuremath{\gamma})^{19}\mathrm{Ne}$. impact pattern a range accretion rates analyzed.
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