Entry-level spin distributions and relative γ -neutron branching ratios of samarium isotopes populated by the (p,t) reaction

N. Cooper, C. W. Beausang, P. Humby, A. Simon, J. T. Burke, R. O. Hughes, S. Ota, C. Reingold, A. Saastamoinen, E. Wilson

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The spin distribution populated in the Sm150(p,t) reaction with 25 MeV protons has been investigated using the silicon telescope and high-purity germanium array Hyperion. Angular distributions of outgoing tritons and relative intensities of γ rays from low-lying levels are used to deduce the initial spin distribution using statistical calculations and are compared with a semiclassical model of the (p,t) reaction. Experimental and theoretical results suggest a peak strength near 4 when gated on outgoing tritons detected in Hyperion, while the full 4π distribution may peak near 2. Additionally, the average γ-neutron branching ratio is determined from the data with the aid of one of two new codes presented in this work. The analysis is extended to other recent studies of Sm152,154(p,t) to form systematics of the spin-dependence of the surrogate method applied to heavy nuclei in the transitional to deformed region.

Original languageEnglish
Article number044618
JournalPhysical Review C
Volume98
Issue number4
DOIs
StatePublished - 24 Oct 2018
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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