High-precision (p,t) Reactions to DetermineReaction Rates in the Stellar rp-process

摘要

The main source of uncertainties in stellar rate calculations of the rp-process and the competing αp-process is often the lack of knowledge of the resonance states above the p- and α-thresholds and their precise energies. We have started a program to study these resonances in proton-rich unstable nuclei via the (p,t) and other neutron-pickup reactions using the high resolution spectrometer Grand Raiden. Here, we are presenting the status of the project and recent results of the ~(25)Al(p,γ) reaction rates based on the analysis of measured ~(28)Si(p,t)~(26)Si spectra.