Strongly damped collisions in the $sup 84$Kr + $sup 209$Bi reaction

Conference · Tue Dec 31 23:00:00 EST 1974

OSTI ID:4099756

Viola, Jr, V E; Wolf, K L; Unik, J P; Huizenga, J R; Birkelund, J; Freiesleben, H; Goldberg, D A; Marion, J B; Wallace, S J ^[1]

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1. eds.

Information on a new reaction mechanism, characterized by strongly damped collisions (SDC), is presented for bombardments of $sup 209$Bi with $sup 84$Kr ions from the Berkeley SuperHILAC. This process accounts for a significant fraction of the reaction cross section in interactions between heavy target nuclei and projectiles of $sup 40$Ar and heavier. The exit channel properties of the strongly damped collisions exhibit the following features: two fragments are emitted with masses near those of the target and projectile, although exchanges of several nucleons can occur; strong damping of the energy degree of freedom is observed; fragment energies are characteristic of deformed fission fragments, representing an attenuation of 100-150 MeV in the entrance channel energy, and the angular distribution for the $sup 84$Kr-like product is strongly peaked at an angle near the classical grazing angle. Measurements have been conducted with 600-MeV and 714-MeV $sup 84$Kr ions. These are compared with the work of Hanappe et al. at 525 MeV. (auth)

• Research Organization: Univ. of Maryland, College Park; Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
• NSA Number: NSA-33-019095
• OSTI ID: 4099756
• Report Number(s): ORO--4856-26; CONF-750447--
• Country of Publication: United States
• Language: English

Related Subjects

*BISMUTH 209 TARGET-- KRYPTON 84 REACTIONS
*BISMUTH 209-- KRYPTON 84 REACTIONS
*KRYPTON 84 REACTIONS-- ELASTIC SCATTERING
643205*
ANGULAR DISTRIBUTION
DAMPING
DIFFERENTIAL CROSS SECTIONS
FISSION FRAGMENTS
ION-ATOM COLLISIONS
KINETIC ENERGY
MEV RANGE 100-1000
N68951* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
190 <= A <= 219--Nuclear Reactions & Scattering
SUPERHILAC