Fragment shell effect in low energy fission: Independent yields of technetium isotopes in the thermal-neutron-induced fission of /sup 239/Pu

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.969· OSTI ID:6095276

Srivastava, A; Goswami, A; Srivastava, B K; Nair, A G.C.; Manohar, S B; Prakash, S; Ramaniah, M V

The independent yields of /sup 101/Tc, /sup 103/Tc, /sup 104/Tc, and /sup 105/Tc have been determined in the thermal-neutron-induced fission of /sup 239/Pu using fast radiochemical separation techniques followed by gamma-ray spectrometry. The most probable fragment mass A/sub p//sup prime/ and mass dispersion sigma/sub A//sup prime/ are obtained from the measured independent yields as 108.35 +- 0.45 and 1.80 +- 0.25 mass units, respectively. A comparison of the elemental yield (Y/sub z/) of technetium obtained from the present work and the literature for the thermal-neutron-induced fission of /sup 235/U and /sup 239/Pu and the spontaneous fission of /sup 252/Cf shows that the Y/sub z/ of technetium in the case of fission of /sup 240/Pu and /sup 252/Cf is very high compared to that of /sup 236/U. The enhancement of the yields in the case of /sup 240/Pu and /sup 252/Cf is attributed to the proximity of spherical-deformed neutron shells 82--88 in the complementary fragments antimony and cesium, respectively.

• Research Organization: Radiochemistry Division, Bhabha Atomic Research Center, Trombay, Bombay-400 085, India
• OSTI ID: 6095276
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:3; 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
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CHARGE DISTRIBUTION
CHEMICAL ANALYSIS
DECAY
FISSION
FISSION YIELD
GAMMA SPECTROMETERS
HADRON REACTIONS
HALF-LIFE
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASS SPECTRA
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLUTONIUM 239 TARGET
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVITY
RADIOCHEMICAL ANALYSIS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTRA
SPECTROMETERS
TARGETS
TECHNETIUM 101
TECHNETIUM 103
TECHNETIUM 104
TECHNETIUM 105
TECHNETIUM ISOTOPES
THERMAL FISSION
YIELDS