Eur. Phys. J. A (2021) 57: 10
https://doi.org/10.1140/epja/s10050-020-00335-1

Regular Article – Experimental Physics

Mechanism of the ${}^{144}$Sm(${}^7$Li,${}^6$Li${}_{3+}^{\ast }$)${}^{145}$Sm reaction at 30 MeV

¹ Heavy Ion Laboratory, University of Warsaw, ul. Pasteura 5a, 02-093, Warsaw, Poland
² Dipartimento di Fisica e Astronomia, Università di Padova, via F. Marzolo 8, 35131, Padova, Italy
³ INFN-Sezione di Padova, via F. Marzolo 8, 35131, Padova, Italy
⁴ National Centre for Nuclear Research, ul. Andrzeja Sołtana 7, 05-400, Otwock, Poland
⁵ Department of Physics, Florida State University, Tallahassee, 32306, Florida, USA

^c nicholas.keeley@ncbj.gov.pl

Received: 26 October 2020
Accepted: 15 December 2020
Published online: 6 January 2021

Abstract

In a recent experiment investigating the origin of the $\alpha$ particle yield in the ${}^7$Li + ${}^{144}$ Sm system the measured $\alpha +d$ coincidences at a bombarding energy of 30 MeV were shown to arise from decay of the 2.186-MeV $3^{+}$ resonance of ${}^6$Li. In this work we demonstrate that the laboratory frame $\alpha$ particle angular distribution extracted from these data can be well described by a standard coupled channels Born approximation calculation and, furthermore, that the mechanism is dominated by direct, one-step single neutron stripping to the $3^{+}$ resonance, as shown previously for the ${}^7$Li + ${}^{65}$Cu and ${}^{93}$Nb systems.