Multifragmentation of gold by 1- and 3.6 GeV/a helium

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:64047

Norbeck, E ^[1]; Bauer, W ^[2]; Lips, V; Barth, R; Oeschler, H ^[3]; Avdeyev, S P; Karnaukhov, V A; Kuznetsov, W D; Petrov, L A ^[4]; Bochkarev, O V ^[5]

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1. Univ. of Iowa, Iowa City, IA (United States)
2. Michigan State Univ., East Lansing, MI (United States)
3. Technische Hochschule Darmstadt, Darmstadt (Germany)
4. Joint Institute for Nuclear Research, Dubna, Moscow (Russian Federation)
5. Kurchatov Institute, Moscow (Russian Federation); and others

Multifragmentation of the system {alpha} + {sup 197}Au has been studied at incident energies of 1 and 3.6 GeV/nucleon with the new 4{pi} array, {open_quotes}FASA{close_quotes}. Mass, energy and velocity of a few fragments are measured with high precision using time-of-flight telescopes, while for the other fragments, global multiplicity information is obtained from 55 thin CsI(Tl) detectors. Very high mean IMF (intermediate mass fragment) multiplicities of {l_angle}M{r_angle}{sub IMF} = 5.1 {+-} 0.8 are observed at the higher incident energy, 40% more than at the lower energy. BUU calculations indicate that the higher incident energy is close to the optimum for high energy deposition. The calculations show that, for central collisions, the projectile goes about 2/3 of the way through the gold. The nucleus stays intact as a bubble forms in the center where the maximum energy is deposited. The experiments were performed at the synchrophasotron (an accelerator similar to the Bevatron) at the JINR in Dubna, Russia.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• OSTI ID: 64047
• Report Number(s): LBL--35984; CONF-9310315--; ON: DE95000804
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA REACTIONS
GEV RANGE 01-10
GEV RANGE 10-100
GOLD 197 TARGET
NUCLEAR FRAGMENTATION