Eur. Phys. J. A (2020) 56: 196
https://doi.org/10.1140/epja/s10050-020-00209-6

Regular Article – Experimental Physics

Time response and its impact on prompt fission -ray spectra characteristics

¹ Extreme Light Infrastructure-Nuclear Physics (ELI-NP)/Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), 077125, Bucharest-Magurele, Romania
² European Commission, Joint Research Centre, Directorate for Nuclear Safety and Security G.2, 2440, Geel, Belgium
³ Present address: Belgian Nuclear Research Center SCK, CEN, Institute for Advanced Nuclear Systems (ANS), 2400, Mol, Belgium
⁴ Present address: Department of Physics, KTH Royal Institute of Technology, 10044, Stockholm, Sweden

^* e-mail: andreas.oberstedt@eli-np.ro

Received: 19 June 2020
Accepted: 23 July 2020
Published online: 1 August 2020

Abstract

The time dependence of prompt -ray spectral characteristics, in particular the multiplicity, was studied during the first 10 ns after the spontaneous fission of Cf. The impact of prompt window and experimental time resolution on the determination of prompt multiplicities is assessed and described mathematically. As a consequence we are able to offer corrections that allow a reliable comparison of results from different measurements. An apparent discrepancy between a theoretical and an experimentally found time dependence is explained by the influence of a finite experimental timing resolution as well as the choice of the prompt timing window.