Elsevier

Nuclear Physics A

Volume 386, Issue 2, 27 September 1982, Pages 245-268
Nuclear Physics A

Gamma ray energies and 36Cl level scheme from the reaction 35Cl(n, γ)

https://doi.org/10.1016/0375-9474(82)90112-9Get rights and content

Abstract

The γ-ray spectrum emitted after thermal neutron capture in 35Cl has been studied by use of the crystal and pair spectrometers installed at the ILL high flux reactor. We identified about 400 transitions in this reaction 326 of which were placed into the 36C1 level scheme; several new states were found. The level energies up to 3.5 MeV were measured with a precision of 5–20 eV relative to the 412 keV 198Au standard, those above 3.5 MeV with a precision of 10ppm. The neutron binding energy was determined to be EB = 8579.68(9) keV.

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    Besides, we must consider the capture reaction (35Cl (n, γ) 36C1) of the thermal neutron and 35Cl, and it will emit gamma rays. However, the natural abundance of 35Cl is about 75.76% (Other is 37Cl) (Coceva et al., 1996; Spits and Kopeckỳ, 1976; Krusche et al., 1982; Pelc et al., 2018). Thus the application of shielding materials contained Cl element maybe product the 36Cl with the half-life of 300 thousand years (Goldstein, 1966).

  • Relative intensities of prompt γ-rays from the <sup>35</sup>Cl(n,γ)<sup>36</sup>Cl reaction with thermal neutrons as secondary γ-ray intensity standards

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    Nevertheless, they show systematic behavior at low energy. They are classified into two groups, except for those in Krusche et al. (1982). The Révay et al. (2004), Raman et al. (2000), Venturini and Pecequilo (1997), Kennett et al. (1981) and Loper and Thomas (1972) values are larger than the present values, whereas the Coceva et al. (1996), NNDC (2010) and IAEA (1991) values are smaller.

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Supported by the German Bundesministerium für Forschung und Technologie.

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