Stripping- and pickup-induced breakup in 11- and 17-MeV/nucleon /sup 20/Ne+/sup 197/Au reactions

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.38.712· OSTI ID:6967785

Gazes, S B; Schmidt, H R; Chan, Y; Chavez, E; Kamermans, R; Stokstad, R G

Breakup processes in 220- and 341-MeV /sup 20/Ne+/sup 197/Au reactions were studied by performing coincidence measurements of the secondary fragments. Projectile-like fragments and light charged particles corresponding to primary stripping, pickup, and inelastic channels were examined. The projectile-like fragments were detected near the classical grazing angle. Kinematic reconstructions of the three-body final states were used to deduce the excitations in the primary projectile-like and target-like fragments. At both bombarding energies, the stripping channels produced relatively cold ejectiles, with the excitation residing mostly in the target recoil. However, the pickup channels tended to leave the target cold, while populating higher excitations in the ejectile. The data are consistent with nucleon transfer as the dominant mode for generating excitation, with the partition of excitation energy between the fragments governed by the direction of the transfer. An extended version of the optimum-Q-value model of Siemens et al. predicts target-like excitations in good agreement with data at 11 MeV/nucleon, but with deviations occurring at 17 MeV/nucleon.

• Research Organization: Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
• OSTI ID: 6967785
• Journal Information: Phys. Rev. C; (United States), Vol. 38:2
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
GOLD 197 TARGET
NEON 20 REACTIONS
BREAKUP REACTIONS
INELASTIC SCATTERING
PICKUP REACTIONS
STRIPPING
ALPHA PARTICLES
ANGULAR DISTRIBUTION
COINCIDENCE SPECTROMETRY
FRAGMENTATION
MEV RANGE 100-1000
MULTIPLICITY
PROTONS
Q-VALUE
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
FERMIONS
HADRONS
HEAVY ION REACTIONS
MEV RANGE
NUCLEAR REACTIONS
NUCLEONS
SCATTERING
TARGETS
TRANSFER REACTIONS
651920* - Nuclear Properties & Reactions
A=190-219
Experimental