Eur. Phys. J. A (2017) 53: 166
https://doi.org/10.1140/epja/i2017-12358-6

Regular Article - Experimental Physics

Stretched configuration of states as inferred from -ray angular distributions in ⁴⁰Ar + ²⁰⁸Pb neutron transfer reactions

¹ Ruđer Bošković Institute, Zagreb, Croatia
² Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy
³ Dipartimento di Fisica Teorica, Università di Torino, and Istituto Nazionale di Fisica Nucleare, Torino, Italy
⁴ Dipartimento di Fisica, Università di Padova, and Istituto Nazionale di Fisica Nucleare, Padova, Italy
⁵ Institut Pluridisciplinaire Hubert Curien, CNRS-IN2P3, Université de Strasbourg, Strasbourg, France
⁶ School of Engineering and Computing, University of the West of Scotland, Paisley, UK
⁷ Instituto de Fisica Corpuscular, CSIC-Universitat de València, Valencia, Spain
⁸ Horia Hulubei National Institute of Physics and Nuclear Engineering and ELI-NP, Bucharest, Romania
⁹ Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia

^* e-mail: petra.colovic@irb.hr

Received: 16 May 2017
Accepted: 25 July 2017
Published online: 24 August 2017

Abstract

Angular distributions of -rays for selected transitions in ^{40, 41, 42}Ar isotopes have been studied with the PRISMA magnetic spectrometer coupled to the CLARA array. These transitions were populated in Ar isotopes reached via neutron transfer in the ⁴⁰Ar + ²⁰⁸Pb reaction. By comparison with the shape of the experimental angular distribution of the known E2 transitions we established more firmly the spin and parity of excited states. In particular, in ⁴¹Ar for the state through the transition whose structure was discussed in terms of a phonon-fermion coupled state. The comparison with the expected fully aligned spin indicated that a high level of spin alignment has been reached.