Neutron Spectrum Formation under Neutron Pumping of the Active Medium Formed by Two Stable Gadolinium Isotopes

I. V. Shamanin, M. A. Kazaryan, V. V. Knyshev, S. V. Bedenko, V. I. Shamanin

Research output: Contribution to journalArticle


Due to the possibility of neutron pumping of the active medium formed by Gd155 and Gd156 gadolinium isotopes, neutron spectral parameters in the active medium are numerically and theoretically studied. The active medium is placed in a tungsten cylindrical volume. Several versions of a tungsten bulb filled with compact gadolinium oxide with graphite reflectors and without reflectors are considered. It is found that the neutron spectrum in the active medium makes possible population inversion of excitation levels of Gd156 isotope nuclei at certain combinations of geometrical parameters of the cylindrical volume.

Original languageEnglish
Pages (from-to)251-255
Number of pages5
JournalBulletin of the Lebedev Physics Institute
Issue number8
Publication statusPublished - 1 Aug 2018



  • gadolinium
  • metastable isotopes
  • neutron spectrum
  • tungsten

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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