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 00:00:00 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), Vol. 15:1
• Country of Publication: United States
• Language: English

Related Subjects

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