DELAYED NEUTRONS AS A PROBE OF NUCLEAR CHARGE DISTRIBUTION IN FISSION OF HEAVY NUCLEI BY NEUTRONS

Authors & Affiliations

Isaev S.G., Piksaikin V.M., Kazakov L.E., Roshchenko V.A.
State Scientific Centre - A.I. Leipunsky Institute for Physics and Power Engineering, Obninsk, Russia

Abstract

A method of the determination of cumulative yields of delayed neutron precursors is developed. This method is based on the iterative least-square procedure applied to delayed neutron decay curves measured after irradiation of 235U sample by thermal neutrons. Obtained cumulative yields in turns were used for deriving the values of the most probable charge in low-energy fission of the above-mentioned nucleus.

Keywords
cumulative yields, delayed neutron precursors, 12 delayed neutron group model, U-235, thermal neutrons, least-square procedure

Article Text (PDF, Translated by IAEA)

References

UDC 539.173.84

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