Prompt gamma ray-spectroscopy of N = 50 fission fragments

F. Drouet; G.S. Simpson; A. Vancraeyenest; G. Gey; G. Kessedjian; T. Malkiewicz; M. Ramdhane; C. Sage; G. Thiamova; T. Grahn; P.T. Greenlees; K. Hauschild; A. Herzan; U. Jakobsson; P. Jones; R. Julin; S. Juutinen; S. Ketelhut; A. Lopez-Martens; P. Nieminen; P. Peura; P. Rahkila; S. Rinta-Antila; P. Ruotsalainen; M. Sandzelius; J. Saren; C. Scholey; J. Sorri; J. Uusitalo

doi:10.1051/epjconf/20136201005

Proceedings

Open Access

EPJ Web of Conferences 62, 01005 (2013)
https://doi.org/10.1051/epjconf/20136201005

Prompt gamma ray-spectroscopy of N = 50 fission fragments

F. Drouet¹^a, G.S. Simpson¹^b, A. Vancraeyenest¹, G. Gey¹, G. Kessedjian¹, T. Malkiewicz¹, M. Ramdhane¹, C. Sage¹, G. Thiamova¹, T. Grahn², P.T. Greenlees², K. Hauschild², A. Herzan², U. Jakobsson², P. Jones², R. Julin², S. Juutinen², S. Ketelhut², A. Lopez-Martens², P. Nieminen², P. Peura², P. Rahkila², S. Rinta-Antila², P. Ruotsalainen², M. Sandzelius², J. Saren², C. Scholey², J. Sorri² and J. Uusitalo²

¹ Laboratoire de Physique Subatomique et de Cosmologie, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Grenoble INP, 38026 Grenoble, France
² Department of physics, University of Jyväskylä, PO Box 35, 40014 Jyväskylä, Finland

^a e-mail: drouet@lpsc.in2p3.fr
^b e-mail: simpson@lpsc.in2p3.fr

Published online: 13 December 2013

Abstract

Excited states in the nuclei ⁸³As and ^84,86Se have been studied via prompt γ-ray spectroscopy. The nuclei were produced by the proton-induced fission of a ²³⁸U target, at the accelerator of the University of Jyväskylä. The JUROGAM-II array was used to detect prompt γ-rays and a triple-γ coincidence analysis performed. A comparison of the N = 50 nuclei with shell-model calculations reproduces the low-lying states in ⁸³As and ⁸⁴Se well. The inclusion of particle-hole excitations is necessary to correctly describe the states above ∼ 3.5 MeV.

© Owned by the authors, published by EDP Sciences, 2013

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