New investigations on the 32S(3He,d)33Cl reaction at 9.6 MeV bombarding energy

M Cinausero ,S Carturan ,S Barlini ,L R Gasques ,M Cicerchia ,D Fabris ,M Degerlier ,G Casini ,D Dell’aquila ,A Lépine‐Szily ,F Gramegna ,S Piantelli ,R Bolzonella ,L Scomparin ,G Mantovani ,I Lombardo ,V Rigato ,T Marchi ,A Buccola ,M Vigilante ,M D’andrea ,M Bruno ,S Valdré

doi:10.1051/epjconf/201922301011

Abstract

The 32S(3He,d)33Cl one-proton transfer reaction is a powerful tool to investigate the spectroscopy of low-lying states in the proton-rich 33Cl nucleus. However, the extraction of firm differential cross-section data at various angles to benchmark and constrain theoretical models is made challenging by the presence of competitive reactions on target contaminants. In this paper we report on arecent measurement using a new generation hodoscope of silicon detectors, capable to detect and identify emitted deuterons down to energies of the order of 2 MeV. The high angular segmentation of our hodoscope combined with a suitable target to control possible contaminants, allowed to unambiguously disentangle the contribution of various states in 33Cl, in particular the 2.352 MeV state lying just few tens of keV above the proton separation energy.

Highlights

The properties of low-lying states in the proton rich 33Cl nucleus can be effectively probed by means of the 32S(3He,d)33Cl one-proton transfer reaction [1,2]
The 32S(3He,d)33Cl one-proton transfer reaction at 9.6 MeV bombarding energy is investigated by using the new generation hodoscope OSCAR [7]
The good energy and angular resolution achieved by our device allows to disentangle the contribution of reactions of interest from contaminant background

Summary

Introduction

The properties of low-lying states in the proton rich 33Cl nucleus can be effectively probed by means of the 32S(3He,d)33Cl one-proton transfer reaction [1,2]. The spin and parity (J ) and the spectroscopic factors (C2Sp) can be determined by the measure of the differential cross-section angular distribution of each individual excited state populated in the residual nucleus and comparing the experimental results with the predictions of theoretical models [1,2]. The estimate of the C2Sp is relevant in nuclear astrophysics, to detemine the (p, ) reaction rate in the stars [6]. In this context, we have performed a new study of the 32S(3He,d)33Cl reaction at 9.6 MeV incident energy by using a new generation hodoscope of silicon detector, OSCAR [7]. Special care has been taken in the target production to reduce possible contaminants

Experimental details

Status of the analysis

Conclusions and perspectives