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Abstract <p>An experimental setup has been developed to study interaction between fast neutrons with an energy above 1&#xa0;MeV and low-<i>Z</i> nuclei with the emission of a <sup>3</sup>H or <sup>4</sup>He nucleus and an electron−positron pair. Its components are a position-sensitive neutron detector with a layer of nuclei under study and proportional chamber with sensitive dimensions of 50 × 50&#xa0;mm<sup>2</sup>, two position-sensitive silicon detectors with sensitive dimensions of 64 × 64&#xa0;mm<sup>2</sup>, and two scintillation detectors based on NaI crystals with a diameter of 42&#xa0;mm, a height of 46&#xa0;mm, and an energy resolution of ~4.5% for electrons. It is possible to study rare intranuclear processes with the emission of internal-conversion electron−positron pairs by performing spatial reconstruction of events and measuring the energy and exit angle of an electron and a positron.</p>

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A Setup for Studying Interactions of Fast Neutrons and Light Nuclei with an Electron−Positron Pair Spectrometer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月1日

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  • S. Kh. Karaevsky,
  • S. I. Potashev,
  • Yu. M. Burmistrov,
  • A. A. Kasparov,
  • E. A. Permyakov,
  • V. N. Ponomarev,
  • V. I. Razin

摘要

Abstract

An experimental setup has been developed to study interaction between fast neutrons with an energy above 1 MeV and low-Z nuclei with the emission of a 3H or 4He nucleus and an electron−positron pair. Its components are a position-sensitive neutron detector with a layer of nuclei under study and proportional chamber with sensitive dimensions of 50 × 50 mm2, two position-sensitive silicon detectors with sensitive dimensions of 64 × 64 mm2, and two scintillation detectors based on NaI crystals with a diameter of 42 mm, a height of 46 mm, and an energy resolution of ~4.5% for electrons. It is possible to study rare intranuclear processes with the emission of internal-conversion electron−positron pairs by performing spatial reconstruction of events and measuring the energy and exit angle of an electron and a positron.