skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exclusive studies of angular distributions in GeV hadron-induced reactions with [sup 197]Au

Abstract

Exclusive studies of angular distributions for intermediate-mass fragments (IMFs) produced in GeV hadron-induced reactions have been performed with the Indiana Silicon Sphere (ISiS) 4[pi] detector array. Special emphasis has been given to understanding the origin of sideways peaking, which becomes prominent in the angular distributions for beam momenta above about 10 GeV/c. Both the magnitude of the effect and the peak angle increase as a function of fragment multiplicity and charge. When gated on IMF kinetic energy, the angular distributions evolve from forward-peaked to near isotropy as the fragment kinetic energy decreases. Fragment-fragment angular-correlation analyses show no obvious evidence for a dynamic mechanism that might signal shock wave effects or the breakup of exotic geometric shapes such as bubbles or toroids. Moving-source and intranuclear cascade simulations suggest that the observed sideways peaking is of kinematic origin, arising from significant transverse momentum imparted to the heavy recoil nucleus during the fast cascade stage of the collision. A two-step cascade and statistical multifragmentation calculation is consistent with this assumption. [copyright] [ital 1999] [ital The American Physical Society]

Authors:
; ; ; ; ; ;  [1];  [2];  [3]; ; ; ;  [4]; ; ; ;  [5];  [6]; ;  [7] more »; « less
  1. (Departments of Chemistry, Physics and IUCF, Indiana University, Bloomington, Indiana 47405 (United States))
  2. (Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, (Canada) V5A I56)
  3. (Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States))
  4. (Department of Physics and NSCL, Michigan State University, East Lansing, Michigan 48824 (United States))
  5. (Department of Chemistry and Cyclotron Institute, Texas A M University, College Station, Texas 77843 (United States))
  6. (Department of Physics, University of Maryland, College Park, Maryland 20740 (United States))
  7. (Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973 (United States))
Publication Date:
OSTI Identifier:
5904659
Alternate Identifier(s):
OSTI ID: 5904659
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 60:3; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR DISTRIBUTION; GOLD 197 TARGET; HADRON REACTIONS; NUCLEAR FRAGMENTATION; PION MINUS REACTIONS; PROTON REACTIONS; BARYON REACTIONS; CHARGED-PARTICLE REACTIONS; DISTRIBUTION; MESON REACTIONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; PION REACTIONS; TARGETS 663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)

Citation Formats

Hsi, W., Kwiatkowski, K., Wang, G., Bracken, D.S., Cornell, E., Ginger, D.S., Viola, V.E., Korteling, R.G., Morley, K.B., Huang, R., Lynch, W.G., Tsang, M.B., Xi, H., Gimeno-Nogues, F., Ramakrishnan, E., Rowland, D., Yennello, S.J., Breuer, H., Gushue, S., Remsberg, L.P., and Botvin. Exclusive studies of angular distributions in GeV hadron-induced reactions with [sup 197]Au. United States: N. p., 1999. Web. doi:10.1103/PhysRevC.60.034609.
Hsi, W., Kwiatkowski, K., Wang, G., Bracken, D.S., Cornell, E., Ginger, D.S., Viola, V.E., Korteling, R.G., Morley, K.B., Huang, R., Lynch, W.G., Tsang, M.B., Xi, H., Gimeno-Nogues, F., Ramakrishnan, E., Rowland, D., Yennello, S.J., Breuer, H., Gushue, S., Remsberg, L.P., & Botvin. Exclusive studies of angular distributions in GeV hadron-induced reactions with [sup 197]Au. United States. doi:10.1103/PhysRevC.60.034609.
Hsi, W., Kwiatkowski, K., Wang, G., Bracken, D.S., Cornell, E., Ginger, D.S., Viola, V.E., Korteling, R.G., Morley, K.B., Huang, R., Lynch, W.G., Tsang, M.B., Xi, H., Gimeno-Nogues, F., Ramakrishnan, E., Rowland, D., Yennello, S.J., Breuer, H., Gushue, S., Remsberg, L.P., and Botvin. Wed . "Exclusive studies of angular distributions in GeV hadron-induced reactions with [sup 197]Au". United States. doi:10.1103/PhysRevC.60.034609.
@article{osti_5904659,
title = {Exclusive studies of angular distributions in GeV hadron-induced reactions with [sup 197]Au},
author = {Hsi, W. and Kwiatkowski, K. and Wang, G. and Bracken, D.S. and Cornell, E. and Ginger, D.S. and Viola, V.E. and Korteling, R.G. and Morley, K.B. and Huang, R. and Lynch, W.G. and Tsang, M.B. and Xi, H. and Gimeno-Nogues, F. and Ramakrishnan, E. and Rowland, D. and Yennello, S.J. and Breuer, H. and Gushue, S. and Remsberg, L.P. and Botvin},
abstractNote = {Exclusive studies of angular distributions for intermediate-mass fragments (IMFs) produced in GeV hadron-induced reactions have been performed with the Indiana Silicon Sphere (ISiS) 4[pi] detector array. Special emphasis has been given to understanding the origin of sideways peaking, which becomes prominent in the angular distributions for beam momenta above about 10 GeV/c. Both the magnitude of the effect and the peak angle increase as a function of fragment multiplicity and charge. When gated on IMF kinetic energy, the angular distributions evolve from forward-peaked to near isotropy as the fragment kinetic energy decreases. Fragment-fragment angular-correlation analyses show no obvious evidence for a dynamic mechanism that might signal shock wave effects or the breakup of exotic geometric shapes such as bubbles or toroids. Moving-source and intranuclear cascade simulations suggest that the observed sideways peaking is of kinematic origin, arising from significant transverse momentum imparted to the heavy recoil nucleus during the fast cascade stage of the collision. A two-step cascade and statistical multifragmentation calculation is consistent with this assumption. [copyright] [ital 1999] [ital The American Physical Society]},
doi = {10.1103/PhysRevC.60.034609},
journal = {Physical Review, C},
issn = {0556-2813},
number = ,
volume = 60:3,
place = {United States},
year = {1999},
month = {9}
}