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Detection of light neutron nuclei in the alpha-particle-induced fission of 238U by the activation method with 27Al

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Abstract

Light nuclear-stable multineutrons among products of the fission of 238U nuclei that is induced by 62-MeV alpha particles have been searched by the activation method with a 27Al sample. These multineutrons have been detected by characteristic gamma rays emitted by the nuclei from the beta-decay chain 28Mg → 28Al → 28Si. The 28Mg parent nucleus can be formed in the 27Al + x n → 28Mg + p(x − 2) n process. The gamma-ray spectra of the irradiated sample exhibit lines of 1342- and 1779-keV photons accompanying the beta decay of the 28Mg and 28Al nuclei, respectively. The decrease in the activity corresponds within the measurement accuracy with the half-life T 1/2 ∼ 21 h of 28Mg, which certainly indicates the detection of nuclear-stable multineutrons x n with x ≥ 6.

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Authors and Affiliations

  1. National Research Centre Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182, Russia

    B. G. Novatsky, S. B. Sakuta & D. N. Stepanov

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  1. B. G. Novatsky
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  2. S. B. Sakuta
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  3. D. N. Stepanov
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Correspondence to S. B. Sakuta.

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Original Russian Text © B.G. Novatsky, S.B. Sakuta, D.N. Stepanov, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 98, No. 11, pp. 747–751.

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Novatsky, B.G., Sakuta, S.B. & Stepanov, D.N. Detection of light neutron nuclei in the alpha-particle-induced fission of 238U by the activation method with 27Al. Jetp Lett. 98, 656–660 (2014). https://doi.org/10.1134/S002136401324017X

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  • DOI: https://doi.org/10.1134/S002136401324017X

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