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Nuclear charge distribution in fission: independent yields of /sup 141/La, /sup 142/La, /sup 92/Y, and /sup 93/Y from thermal-neutron fission of /sup 233/U and /sup 92/Y and /sup 93/Y from thermal-neutron fission of /sup 249/Cf

Thesis/Dissertation ·
OSTI ID:5936643
The fractional independent yield values of /sup 141/La, /sup 142/La, /sup 93/Y, and /sup 92/Y from thermal-neutron-induced fission of /sup 223/U and /sup 93/Y and /sup 92/Y from thermal-neutron-induced fission of /sup 249/Cf were measured by radiochemical methods. Fractional independent yields determined for the thermal-neutron fission of /sup 233/U are: /sup 141/La, 0.026 +- 0.006; /sup 142/La, 0.068 +- 0.010; /sup 92/Y, 0.011 +- 0.001; /sup 93/Y, 0.058 +- 0.011. Fractional independent yields determined for the thermal-neutron fission of /sup 249/Cf are: /sup 92/Y, 0.063 +- 0.016; /sup 93/Y, 0.238 +- 0.057. The lanthanum and yttrium values were combined with previously reported isobaric xenon and krypton fractional-yield values to determine nuclear charge dispersion curves for mass numbers, 141, 142, 92, and 93 from thermal-neutron fission of /sup 233/U and for mass number 92 from thermal-neutron fission of /sup 249/Cf. The Z/sub p/ values for A = 138 to 142 and 92 in /sup 249/Cf thermal-neutron-induced fission were compared with those predicted by similar yields from /sup 235/U fission. The empirical Z/sub p/ values obtained using sigma = 0.69 are in better agreement with predicted values than empirical Z/sub p/ values obtained using sigma = 0.56.
Research Organization:
Missouri Univ., Columbia (USA)
OSTI ID:
5936643
Country of Publication:
United States
Language:
English

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Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIFORNIUM 249 TARGET
CHARGE DISTRIBUTION
CHEMICAL PREPARATION
DATA
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
FISSION
FISSION YIELD
HADRON REACTIONS
HADRONS
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
LANTHANUM 141
LANTHANUM 142
LANTHANUM ISOTOPES
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SYNTHESIS
TARGETS
THERMAL FISSION
THERMAL NEUTRONS
URANIUM 233 TARGET
YIELDS
YTTRIUM 92
YTTRIUM 93
YTTRIUM ISOTOPES