Structure of S30 with S32(p,t)S30 and the thermonuclear P29(p,γ)S30 reaction rate

摘要: The structure of proton unbound $^{30}\mathrm{S}$ states is important for determining the $^{29}\mathrm{P}$($p,\ensuremath{\gamma}$)$^{30}\mathrm{S}$ reaction rate, which influences explosive hydrogen burning in classical novae and type I x-ray bursts. rate this temperature regime had been previously predicted to be dominated by two low-lying, unobserved, ${J}^{\ensuremath{\pi}}=$ ${3}^{+}$ ${2}^{+}$ resonances above threshold $^{30}\mathrm{S}$. To search these levels, was studied using $^{32}\mathrm{S}$($p,t$)$^{30}\mathrm{S}$ transfer with a magnetic spectrograph. We have confirmed previous detection state near 4700 keV, tentatively assigned ${J}^{\ensuremath{\pi}}={3}^{+}$. also discovered new at 4814(3) strong candidate other resonance (${J}^{\ensuremath{\pi}}={2}^{+}$). up 4--20 times larger than determined rates over relevant range. uncertainty due uncertainties energies has significantly reduced.