Kinetic energy and fragment mass distributions for the spontaneous and photon-induced fission of /sup 244/Pu

Journal Article · Tue Mar 01 04:00:00 EST 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.27.1117· OSTI ID:6076157

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

Energy correlation measurements were performed for the spontaneous fission of /sup 244/Pu and its photofission with 12-, 15-, 20-, and 30-MeV bremsstrahlung. The photofission cross section for /sup 244/Pu was deduced from a measured yield curve up to 30 MeV using the photon difference method. A comparison of the (m*) behavior for spontaneous and photon induced fission shows that the observed decrease with increasing compound nucleus excitation energy of the average total kinetic energy release is caused predominantly by changes in the total deformation of the fragments for the mass splits with the heavy fragment mass in the vicinity of the closed N = 82 neutron shell. Comparing the fissioning systems /sup 244/Pu and /sup 240/Pu, the difference, /sub sf/-/sub ..gamma../, between spontaneous and photon induced fission is 3 MeV larger for the former system. The (m/sub H/() curves for /sup 240/Pu (sf) and /sup 244/Pu (sf) are parallel at a distance of about 3 MeV. The mass distribution for photon induced fission of /sup 244/Pu compared to spontaneous fission shows a decreased peak yield, a broadening of the mass distribution peaks, and a shift of the peaks over 3 mass units towards asymmetry. Comparing the fissioning systems /sup 240/Pu and /sup 244/Pu, the heavy fragment peak remains practically constant in position for both spontaneous and photon induced fission.

• Research Organization: Nuclear Physics Laboratory, Proeftuinstraat 42, B-9000 Gent, Belgium
• OSTI ID: 6076157
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 27:3; 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
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BREMSSTRAHLUNG
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DECAY
DEFORMATION
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FISSION
FISSION FRAGMENTS
HEAVY NUCLEI
INFORMATION
ISOTOPES
KINETIC ENERGY
MASS SPECTRA
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR DEFORMATION
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PHOTOFISSION
PHOTONUCLEAR REACTIONS
PLUTONIUM 240
PLUTONIUM 244
PLUTONIUM 244 TARGET
PLUTONIUM ISOTOPES
RADIATIONS
RADIOISOTOPES
SHELL MODELS
SPECTRA
SPONTANEOUS FISSION
SYMMETRY
TARGETS
YEARS LIVING RADIOISOTOPES