Neutron capture surrogate reaction on ⁷⁵As in inverse kinematics using (d,pγ)

W.A. Peters^1a, J.A. Cizewski¹, R. Hatarik¹, P.D. OʼMalley¹, K.L. Jones², K. Schmitt², B.H. Moazen², K.Y. Chae², S.T. Pittman², R.L. Kozub³, D. Vieira⁴, M. Jandel⁴, J.B. Wilhelmy⁴, C. Matei⁵, J. Escher⁶, D.W. Bardayan⁷, S.D. Pain⁷ and M.S. Smith⁷

¹ Rutgers University
² University of Tennessee
³ Tennessee Technological University
⁴ Los Alamos National Laboratory
⁵ Oak Ridge Associated Universities
⁶ Lawrence Livermore National Laboratory
⁷ Oak Ridge National Laboratory

^a e-mail: wapeters@nuclearemail.org

Abstract

The ⁷⁵As(d,pγ) reaction in inverse kinematics as a surrogate for neutron capture was performed at Oak Ridge National Laboratory using a deuterated plastic target. The intensity of the 165 keV γ-ray from ⁷⁶As in coincidence with ejected protons, from exciting ⁷⁶As above the neutron separation energy populating a compound state, was measured. A tight geometry of four segmented germanium clover γ-ray detectors together with eight ORRUBA-type silicon-strip charged-particle detectors was used to optimize geometric acceptance. The preliminary analysis of the ⁷⁵As experiment, and the eïňČcacy and future plans of the (d,pγ) surrogate campaign in inverse kinematics, are discussed.