Nuclear-charge distribution for A = 121 from thermal-neutron-induced fission of /sup 235/U

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.31.1334· OSTI ID:5817458

Robinson, L; Wahl, A C; Semkow, T M; Norris, A E

The fractional cumulative yield of /sup 121/Ag and the fractional independent yields of /sup 121/Cd, /sup 121/In, and /sup 121/Sn from thermal-neutron-induced fission of /sup 235/U were determined radiochemically to be 0.12 +- 0.05, 0.61 +- 0.09, 0.24 +- 0.08, and 0.03 +- 0.04, respectively. The yield values were used to determine the nuclear-charge-distribution parameters sigma/sub Z/ = 0.55 +- 0.10 and ..delta..Z = 0.50 +- 0.05 for A = 121. The sigma/sub Z/ for A = 121 is close to sigma/sub Z/$ = 0.52 +- 0.02 for high-yield fission products, and no evidence for an even-odd Z effect was found for A = 121. The positive ..delta..Z value, which corresponds to Z/sub P/ = 48.15, is similar to those for several higher mass numbers reported previously, and it is considerably greater than the negative values predicted by the scission-point theoretical model. The use of a separation distance between nascent fragments greater than 1.4 fm, the value used in the theoretical calculations, could reduce the discrepancy and could also account for the observed enhanced independent yields of tin fission products with Z/sub P/ near 50 (A = 126--129).

• Research Organization: Department of Chemistry, Washington University, St. Louis, Missouri 63130
• OSTI ID: 5817458
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 31:4; ISSN PRVCA
• 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
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CADMIUM 121
CADMIUM ISOTOPES
CHARGE DISTRIBUTION
CHEMICAL ANALYSIS
DATA
DAYS LIVING RADIOISOTOPES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FISSION
FISSION FRAGMENTS
FISSION YIELD
HADRON REACTIONS
INDIUM 121
INDIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
NEUTRON REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
QUANTITATIVE CHEMICAL ANALYSIS
RADIOCHEMICAL ANALYSIS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SILVER 121
SILVER ISOTOPES
TARGETS
THERMAL FISSION
TIN 121
TIN ISOTOPES
URANIUM 235 TARGET
YEARS LIVING RADIOISOTOPES
YIELDS