Excitation Functions of some Neutron Threshold Reactions on 89Y in the Energy Range of 7.8 to 14.7 MeV

R. M. Klopries, R. Dóczi, S. M. Qaim, S. Sudá, J. Csikai

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Excitation functions were measured for 89Y(n,2n)88Y, 89Y(n,p)89Sr and 89Y(n,α)86Rb reactions from their respective thresholds up to 14.7 MeV using the activation technique. Quasimonoenergetic neutrons in the energy range of 7.8 to 13.3 MeV were produced via the 2H(d,n)3He reaction on a D2 gas target at the Jülich compact cyclotron (CV 28), and monoenergetic neutrons in the range of 13.8 to 14.7 MeV using the D-T neutron generator at Debrecen. For characterization of 88Y and 86Rb, high-resolution γ-ray spectrometry was applied. The latter product was also separated radiochemically and characterized by low-level β counting; the results obtained using the two counting methods were generally in good agreement. The product 89Sr is a pure β emitter: its activity was exclusively assayed via radiochemical separation and β counting. Our results agree with the literature values on the (n,2n) reaction and provide the first consistent set of data on the (n,p) and (n,α) reactions near their thresholds. Statistical model calculations incorporating precompound effects were performed on the three excitation functions under consideration. The experimental and theoretical results were found to be in good agreement. Some systematic trends in the excitation functions in this mass region are discussed.

Original languageEnglish
Pages (from-to)3-10
Number of pages8
JournalRadiochimica Acta
Issue number1-2
Publication statusPublished - jan. 1 1997

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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