EVALUATION OF THE CROSS-SECTIONS OF THRESHOLD REACTIONS LEADING TO THE PRODUCTION OF LONG-LIVED RADIONUCLIDES DURING IRRADIATION OF STEELS BY THERMONUCLEAR SPECTRUM NEUTRONS

Authors & Affiliations

Blokhin A.I., Buleeva N.N., Manokhin V.N., Mikhajlyukova M.V., Nasyrova S.M., Skripova M.V.
State Scientific Centre - A.I. Leipunsky Institute for Physics and Power Engineering, Obninsk, Russia

Abstract

The present paper analyses and evaluates the cross-sections of threshold reactions leading to the production of long-lived radionuclides during the irradiation, by thermonuclear spectrum neutrons, of steels containing V, Ti, Cr, Fe and Ni. On the basis of empirical systematics a new evaluation of the (n,2n), (n,p), (n,np), n,α) and (n,nα) excitation functions is made for all isotopes of V, Ti, Cr, Fe and Ni and for intermediate isotopes produced in the chain from irradiated isotopes up to production of the long-lived radionuclides ³⁹Ar, ⁴²Ar, ⁴¹Ca, ⁵³Mn, ⁶⁰Fe, ⁶⁰Co, ⁵⁹Ni, ⁶³Ni. A comparison is made with the experimental and other evaluated data.

Keywords
evaluation, cross-sections, threshold reactions, excitation functions , long-lived radionuclides, steel, V, Ti, Cr, Fe, Ni

Article Text (PDF, Translated by IAEA)

References

UDC 539.17

Problems of Atomic Science and Technology. Series: Nuclear Constants", issue 1, 2001