# DREB2018 -- 10th International Conference on Direct Reactions with Exotic Beams

4-8 June 2018
Matsue
Asia/Tokyo timezone

## Constraining the $^{30}$P(p,$\gamma$)$^{31}$S Reaction Rate, via a Measurement of the $^{32}$S(p,d)$^{31}$S* Reaction

Not scheduled
15m
Kunibiki Messe (Matsue)

### Kunibiki Messe

#### Matsue

Poster Contribution

### Speaker

Sean Burcher (University of Tennessee Knoxville)

### Description

Accurate modeling of classical nova nucleosynthesis is fundamentally dependent on the thermonuclear reaction rates of the nuclei involved. In particular it has been shown that the $^{30}$P(p,$\gamma$)$^{31}$S reaction rate is the largest source of uncertainty in the final abundance of nuclei created in a classical nova, involving an ONe white dwarf. The calculation of the $^{30}$P(p,$\gamma$)$^{31}$S reaction rate, at nova temperatures, requires knowledge of the spin and parity assignments and partial widths of the levels in $^{31}$S just above the proton threshold. To obtain the relevant nuclear data, a measurement of the $^{32}$S(p,d)$^{31}$S* reaction has been performed at the Texas A$\&$M Cyclotron Institue using a proton beam from the K150 cyclotron and a target consisting of ZnS deposited on a thin carbon backing. The newly commisioned, high-efficiency, particle-gamma array, Hyperion, was used in a configuration with 12 HPGe clover detectors and a dE-E telescope of segmented annular silicon detectors downstream of the target position for the detection of direct reaction products. In addition, a single silicon detector was placed upstream of the target for the detection of decay protons. Initial results from the experiment will be presented.
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This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physic under contracts DE-FG02-96ER40983 (UTK), DE-AC05-00OR22725 (ORNL), DE-NA-0003780 (Notre Dame), DE-AC52-07NA27344 (LLNL), and DE-FG03-93ER40773 (TAMU), with additional support from The Welch Foundation, The National Science Foundation under PHY-1430152 (JINA-CEE), and the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory.

### Primary authors

K.A. Chipps (Oak Ridge National Laboratory) R.O. Hughes (Lawerence Livermore National Laboratory) Sean Burcher (University of Tennessee Knoxville)

### Co-authors

A. Saastamoinen (Texas A&M University) A. Simon (University of Notre Dame) C. Reingold (University of Notre Dame) H. Clark (Texas A&M University) H. Jayatissa (Texas A&M University) J. Burke (Lawerence Livermore National Laboratory) J. Hooker (Texas A&M University) J.A. Cizewski (Rutgers University) J.M. Allmond (Oak Ridge National Laboratory) K. Schmidt (Joint Institute for Nuclear Astophysics - Center for the Evolution of the Elements) K.L. Jones (University of Tennessee Knoxville) N. Cooper (University of Notre Dame) S. Ahn (Texas A&M University) S. Ota (Texas A&M University) S. Upadhyayula (Texas A&M University) S.D. Pain (Oak Ridge National Laboratory)

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