Complex fragment emission in the 200-MeV {sup 4}He+{sup nat}Ag,{sup 197}Au reactions

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.1918· OSTI ID:557608

Zhang, J; Kwiatkowski, K; Bonser, D; Fatyga, M; Coon, S D; Stith, K; Viola, V E; Woo, L W; Yennello, S J ^[1]

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1. Departments of Chemistry and Physics and IUCF, Indiana University, Bloomington, Indiana 47405 (United States)

Spectra, angular distributions, and cross sections have been measured for Z=3{endash}14 fragments produced in 200-MeV {sup 4} He-induced reactions on {sup nat} Ag and {sup 197}Au targets. In addition, isotopic yields were measured at forward angles. Two-component moving-source fits have been performed on the data to evaluate the relative contributions of nonequilibrium and equilibrium emission mechanisms. At forward angles, the complex fragment yields are dominated by nonequilibrium emission, with IMF energies extending from the emission barrier to momenta in excess of the incident beam. Backward of 90{degree} the yields are nearly isotropic and exhibit spectra consistent with emission from an equilibrated composite nucleus. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 557608
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
CROSS SECTIONS
EQUILIBRIUM
GOLD 197 TARGET
NUCLEAR FRAGMENTATION
NUCLEAR FRAGMENTS
SILVER
SPECTRA