Prompt neutrons accompanying the spontaneous fission of 250No

Bekzat Sailaubekov, Andrey V. Isaev, A. I. Svirikhin, R. S. Mukhin, Maxim L. Chelnokov, Victor I. Chepigin, H. M. Devaraja, I. N. Izosimov, Alena A. Kuznetsova, O. N. Malyshev

7 more authors

A. G. Popeko, Yury A. Popov, Evgeny A. Sokol, M. S. Tezekbayeva, Alexander V. Yeremin, Araceli Lopez-Martens, Karl Hauschild

2024

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DOI 10.1063/5.0193489

Data confidence 70 medium

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Abstract

This paper describes the experiment conducted on the SHELS (Separator for Heavy Element Spectroscopy) separator [1] aimed at studying the properties of spontaneous fission of 250 No.A separator detection system consists of a time-of-flight system and SFiNx (Spontaneous Fission, Neutrons and x-rays) detection system [2] is described.The SFiNx detection system consists of an assembly of double-sided Si detectors, around which 116 proportional neutron counters filled with 3 He are placed.During experiment, 1366 events of spontaneous fission of 250 No were registered.The average number of neutrons per one fission (𝑣̅ = 4.24 ± 0.13) and the distribution of neutron multiplicities were obtained, and the half-lives of the 250 No were measured for the ground T1/2 = (3.89± 0.17) µs and isomeric states T1/2 = (39.14± 3.34) µs.