Charge and mass distributions in the reaction of /sup 40/Ar ions with /sup 238/U

Journal Article · Tue Jun 01 00:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.13.2347· OSTI ID:7364080

Kratz, J V; Liljenzin, J O; Norris, A E; Seaborg, G T

The reaction of 288 MeV /sup 40/Ar ions with thick /sup 238/U targets has been studied experimentally with nuclear chemistry techniques. The formation cross sections of 130 radioactive nuclides were measured. The data have been used to delineate charge and mass distributions. The mass distribution is interpreted as a superposition of several components: transfer products (quasielastic component, 400 +- 120 mb), multinucleon transfer products (deep inelastic component, 100 +- 50 mb) and products from complete fusion-fission (620 +- 150 mb). In addition, there is evidence for sequential fission of heavy products formed in quasielastic and deep inelastic transfer reactions. In the first case a double-humped mass distribution (150 +- 30 mb) with the characteristics of low-energy fission is observed. Apparently, the sequential fission after deep inelastic processes occurs at higher excitation energies. For the quasielastic component the mass to charge ratio is close to that of the projectile or target, whereas for the deep inelastic component and for the fusion-fission component the mass to charge ratios appear to be fully equilibrated. Proton pickup reactions in the deep inelastic reactions of /sup 40/Ar lead to a buildup of products up to at least Z=26, indicating a continuous development from deep inelastic transfer to fusion-fission. (AIP)

• Research Organization: Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, California 94720
• OSTI ID: 7364080
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 13:6; 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
ARGON 40 REACTIONS
CHARGED-PARTICLE REACTIONS
CHEMISTRY
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
ENERGY RANGE
FISSION
FUSION REACTIONS
HEAVY ION REACTIONS
INELASTIC SCATTERING
ISOTOPES
MASS SPECTRA
MEV RANGE
MEV RANGE 100-1000
NUCLEAR CHEMISTRY
NUCLEAR REACTIONS
QUASI-ELASTIC SCATTERING
QUASI-FREE REACTIONS
RADIOISOTOPES
SCATTERING
SPECTRA
TARGETS
URANIUM 238 TARGET