Constraining the $^{30}$P(p,$\gamma$)$^{31}$S reaction using $^{30}$P(d,p$\gamma$)$^{31}$P with GODDESS
ORAL
Abstract
In classical nova nucleosynthesis, the $^{30}$P(p,$\gamma$)$^{31}$S reaction rate critically affects the mass flow into the A=30-40 range, impacting the abundances of isotopes of phosphorus, sulfur and silicon. However, currently available $^{30}$P beam intensities are insufficient to measure the (p,$\gamma$) reaction directly. The rate of this reaction depends on undetermined spectroscopic strengths of low-lying resonances in $^{31}$S, located between 6 and 7 MeV in excitation. However, it is experimentally difficult to measure proton spectroscopic factors on unstable nuclei. We performed a $^{30}$P(d,p$\gamma$)$^{31}$P neutron transfer reaction measurement using the newly commissioned GODDESS (Gretina-ORRUBA: Dual Detectors for Experimental Structure Studies) system with an 8 MeV/u $^{30}$P beam, from RAISOR at ATLAS, in order to provide constraints on the spectroscopic strengths for $^{31}$S levels via mirror symmetry. Details of the experiment and initial data analysis will be presented.
*This work is supported by the U.S. Dept. of Energy, Office of Science, Office of Nuclear Physics, the NNSA SSAA Program, and the National Science Foundation.
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