CUMULATIVE YIELDS OF DELAYED NEUTRON PRECURSORS IN NEUTRON-INDUCED FISSION OF Np-237 AND U-238 IN THE 0.5–5 MeV ENERGY REGION

Authors & Affiliations

Roshchenko V.A., Piksaikin V.M., Korolev G.G., Balakshev Yu.F.
Russian Federation State Scientific Centre — A.I. Leipunsky Institute of Physics and Power Engineering, Obninsk, Russia

Abstract

Experimental results for the cumulative yields of delayed neutron precursors (87Br, 88Br, 89Br, 91Br, 93Kr, 94Rb, 95Rb, 137I, 138I, 139I and 140I) were obtained for the neutron-induced fission of 237Np and 238U. For the first time a detailed energy dependence of cumulative yields of delayed neutron precursors was obtained for a wide range (0.5–5 MeV) of fissioning system excitation energies. The results obtained were compared with analogous data available in the literature.

Keywords
cumulative yields, delayed neutron precursors, fission of237Np, 238U, energy dependence, fissioning system excitation energies

Article Text (in English, PDF, Tranlated by IAEA)

References

UDC 539.17

Problems of Atomic Science and Technology. Series: Nuclear Constants", issue 1-2, 2006