Fragment mass and kinetic energy distributions for /sup 242/Pu(sf), /sup 241/Pu(n/sub th/,f), and /sup 242/Pu(. gamma. ,f)

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.498· OSTI ID:6855769

Thierens, H; Jacobs, E; D'hondt, P; De Clercq, A; Piessens, M; De Frenne, D

Energy correlation measurements were performed for the spontaneous fission of /sup 242/Pu, the thermal-neutron-induced fission of /sup 241/Pu, and the photofission of /sup 242/Pu with 12-, 15-, 20-, and 30-MeV bremsstrahlung. The photofission cross section for /sup 242/Pu was determined up to 30 MeV. For /sup 242/Pu(sf) the overall kinetic energy distribution is strongly asymmetric and the overall mass distribution has a very high peak yield (9%). Important deviations of the average total kinetic energy release and the average light and heavy fragment masses and from the systematics of Unik et al. are also observed for this fissioning system. These effects can be explained in the framework of the static scission point model by the strong preferential formation of a shell-stabilized scission configuration with the neutron number of the heavy and light fragments in the vicinity of the spherical N = 82 neutron shell and the deformed N = 66 neutron shell, respectively. A decrease of with the average excitation energy , d/d = -0.30 +- 0.04, is observed in the photofission of /sup 242/Pu.

• Research Organization: Nuclear Physics Laboratory, B-9000 Gent, Belgium
• OSTI ID: 6855769
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:2; 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
BREMSSTRAHLUNG
CROSS SECTIONS
DECAY
ELECTROMAGNETIC RADIATION
ENERGY RANGE
ENERGY SPECTRA
FISSION
FISSION FRAGMENTS
HADRON REACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEUTRON REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PHOTOFISSION
PHOTONUCLEAR REACTIONS
PLUTONIUM 241 TARGET
PLUTONIUM 242 TARGET
RADIATIONS
SHELL MODELS
SPECTRA
SPONTANEOUS FISSION
TARGETS
THERMAL FISSION