Energy spectra of electrons and antineutrinos from fragments in thermal-neutron fission of /sup 235/U and /sup 239/Pu

Journal Article · Tue Feb 01 04:00:00 EST 1977 · Sov. J. Nucl. Phys. (Engl. Transl.); (United States)

OSTI ID:7281000

Borovoi, A A; Dobrynin, Y L; Kopeikin, V I

The choice between the different variants of weak-interaction theory requires increased accuracy of neutrino experiments. For reactor experiments this requirement necessarily involves a good knowledge of the energy spectrum of nu-bar/sub e/ from /sup 235/U fission fragments. In addition, in most apparatus used for this purpose a significant amount of /sup 239/Pu accumulates, and therefore the spectrum of nu-bar/sub e/ can be distorted with passage of time. We present calculations of the stationary energy spectra of antineutrinos and electrons emitted by fission fragments from thermal-neutron fission of /sup 235/U and /sup 239/Pu. It is shown that the spectra of leptons from /sup 239/Pu fission products are significantly softer than the analogous spectra from /sup 235/U. Calculations of the cross sections for processes averaged over the nu-bar/sub e/ spectra for /sup 235/U and /sup 239/Pu indicate the necessity of taking into account this difference in conducting quantitative neutrino experiments.

• Research Organization: I. V. Kurchatov Atomic Energy Institute
• OSTI ID: 7281000
• Journal Information: Sov. J. Nucl. Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Nucl. Phys. (Engl. Transl.); (United States) Vol. 25:2; ISSN SJNCA
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTILEPTONS
ANTIMATTER
ANTINEUTRINOS
ANTIPARTICLES
BARYON REACTIONS
CROSS SECTIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
FISSION
FISSION FRAGMENTS
HADRON REACTIONS
LEPTONS
MASSLESS PARTICLES
NEUTRINOS
NEUTRON REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PLUTONIUM 239 TARGET
SPECTRA
TARGETS
THERMAL FISSION
URANIUM 235 TARGET