Single and double proton emissions from theO14+He4interaction

We observed single and double proton emissions in the $^{14}\mathrm{O}+^{4}\mathrm{He}$ interaction by the thick target inverse kinematic (TTIK) method at initial energy for $^{14}\mathrm{O}$ at 32.7 MeV. We found that the protons mainly originate from the resonance excitation of states in $^{18}\mathrm{Ne}$. The observed states in $^{18}\mathrm{Ne}$ decay by protons mainly to proton unstable states in $^{17}\mathrm{F}$. It was found that the decay of a state in $^{18}\mathrm{Ne}$ at ${E}_{\mathrm{ex}}=8.45$ MeV demonstrates the features of a decay by a correlated proton pair. The observed properties of the $^{14}\mathrm{O}+^{4}\mathrm{He}$ interaction make a previous interpretation for the rate of $^{14}\mathrm{O}$($^{4}\mathrm{He}$, $p$)$^{17}\mathrm{F}$ at astrophysical energies suspect. We show how the TTIK method should be modified to obtain the data of astrophysical interest.