Fission yields in the symmetric region: Yields of the stable isotopes of tin and cadmium in the thermal neutron fission of /sup 235/U and /sup 239/Pu

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.15.344· OSTI ID:7130282

Mathews, C K

The relative isotopic abundances of five isotopes of cadmium (111, 112, 113, 114, and 116) and eight isotopes of tin (117, 118, 119, 120, 121, 122, 124, and 126) have been measured in the thermal neutron fission of /sup 235/U and /sup 239/Pu. Samples of /sup 235/U and /sup 239/Pu were irradiated in a reactor; the elements were chemically separated and the isotopic abundances were mass spectrometrically determined. By suitably normalizing these relative yields, it has been possible to obtain the cumulative chain yields at 12 masses in the symmetric region of the mass distribution. These results indicate that there is a fine structure in the 113--115 mass region, especially in the fission of /sup 235/U. However, the mass distribution appears to be smooth between masses 116 and 126. The depression in the mass-yield curve around mass 115 may be related to the break around this mass number in the prompt neutron distribution as a function of mass. (AIP)

• Research Organization: Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India
• OSTI ID: 7130282
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 15:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

652016* -- Nuclear Properties & Reactions
A=220 & above
Theoretical-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BINARY FISSION
CADMIUM ISOTOPES
EVEN-ODD NUCLEI
FINE STRUCTURE
FISSION
FISSION YIELD
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE PRODUCTION
ISOTOPES
MASS SPECTRA
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PLUTONIUM 239
PLUTONIUM ISOTOPES
RADIOISOTOPES
SPECTRA
THERMAL FISSION
TIN ISOTOPES
URANIUM 235
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
YIELDS