Development of a liquid scintillator based active fission target for FIPPS

F. Kandzia; G. Belier; C. Michelagnoli; J. Aupiais; M. Barani; J. Dudouet; Ch. E. Düllmann; Ł. W. Iskra; M. Jentschel; Y. H. Kim; U. Köster; A. Turturica

doi:10.1140/epja/s10050-020-00201-0

2022 Impact factor 2.7

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2020) 56: 207
https://doi.org/10.1140/epja/s10050-020-00201-0

Special Article – New Tools and Techniques

Development of a liquid scintillator based active fission target for FIPPS

F. Kandzia¹^*, G. Belier², C. Michelagnoli¹^**, J. Aupiais², M. Barani³, J. Dudouet⁴, Ch. E. Düllmann⁵^,6^,7, Ł. W. Iskra⁸, M. Jentschel¹, Y. H. Kim¹, U. Köster¹ and A. Turturica⁹

¹ Institut Laue Langevin, 71 Avenue des Martyrs, 38042, Grenoble, France
² CEA, DAM, DIF, 91297, Arpajon, France
³ Dipartimento di Fisica, Universita degli Studi di Milano, Via Festa del Perdono 7, 20122, Milan, Italy
⁴ Université Lyon 1, CNRS/IN2P3, IPN-Lyon, 69622, Villeurbanne, France
⁵ Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
⁶ GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291, Darmstadt, Germany
⁷ Helmholtz Institut Mainz, 55099, Mainz, Germany
⁸ INFN sezione di Milano, Via Celoria 16, 20133, Milan, Italy
⁹ Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, 077125, Bucharest, Romania

^* e-mail: kandzia@ill.fr
^** e-mail: michelagnolic@ill.fr

Received: 14 April 2020
Accepted: 12 July 2020
Published online: 18 August 2020

Abstract

An active fission target has been developed for the FIPPS instrument at ILL, enabling for the first time an efficient suppression of -delayed rays in high-resolution and high-efficiency -ray spectroscopy of fission fragments at a neutron beam. The target is based on a liquid scintillator in which the actinide is dissolved, resulting in a 4 fragment detection. Measurements have been performed with U, with a fission tagging efficiency of 97.8(25)%. The high efficiency, together with the good time resolution of the scintillator target, provide high-selectivity data for -ray spectroscopy studies of fission fragments.