Abstract
The energy dependence of the relative yield of delayed neutrons and of half-lives of their precursor nuclei with fissioning 239Pu by 14.2–17.9 MeV neutrons is measured. The data obtained are analyzed in terms of the average half-life 〈T〉 of the precursor nuclei of the delayed neutrons. It is shown that the observed growth of 〈T〉 with increasing primary neutron energy in the energy range studied is due predominately to opening of the channels for the emission fission of nuclei. Comparing the data on the average half-life of the precursor nuclei of delayed neutrons obtained in the present work with those obtained by other authors showed that the anomalously high values of 〈T〉 are due to methodological features of the experiment which are related with the properties of the reaction T(d, n)4He used as a neutron source on electrostatic charged-particle accelerators. The data obtained are of great value for developing instrumentational nondestructive means for determining the nuclide composition of nuclear fuel based on the detection of delayed neutrons.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
V. Piksaikin, L. Kazakov, S. Isaev, et al., “Energy dependence of relative abundances and periods of delayed neutrons from neutron induced fission of 235U, 238U, 239Pu in 6-and 8-group model representation,” Progress in Nuclear Energy, 41, No. 1–4, 203–222 (2002).
V. M. Piksaikin, Yu. F. Balakshev, S. G. Isaev, et al., “Measurement of the energy dependence of the parameters of delayed neutrons with fissioning of 237Np by fast neutrons,” At. Énerg., 85, No. 1, 51–59 (1998).
J. Marion and J. Fowler (eds.), Fast Neutron Physics, Vol. 1 [Russian translation], Gosatomizdat, Moscow (1963).
V. Piksaikin, S. Isaev, and A. Goverdovski, “Characteristics of delayed neutrons: systematics and correlation properties,” Progress in Nuclear Energy, 41, No. 1–4, 361–384 (2002).
B. Maksutenko, “Delayed neutrons from uranium isotopes, 232Th and 239Pu,” in: Proc. IAEA of a Panel on Delayed Fission Neutrons, Vienna, April 24–27, 1967, p. 191.
V. Piksaikin and S. Isaev, Correlation Properties of Delayed Neutrons from Fast Neutron Induced Fission, Report INDC(CCP)-415, October 1998, IAEA, Vienna.
Author information
Authors and Affiliations
Additional information
__________
Translated from Atomnaya Énergiya, Vol. 101, No. 6, pp. 441–444, December, 2006.
Rights and permissions
About this article
Cite this article
Roshchenko, V.A., Piksaikin, V.M., Kazakov, L.E. et al. Relative yield of delayed neutrons and half-life of their precursor nuclei with fissioning of 239Pu by 14.2–17.9 MeV neutrons. At Energy 101, 897–900 (2006). https://doi.org/10.1007/s10512-006-0188-z
Received:
Issue Date:
DOI: https://doi.org/10.1007/s10512-006-0188-z