Dependence of the binary-encounter-peak energy on the projectile core
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
The energy of the binary-encounter peak has been determined for 0.6 MeV/u O, F, Si, Ti, Cu, and Br ions colliding with H{sub 2} targets. The projectiles all had the same charge q=7, while the atomic number Z of the projectiles ranged from 8 (almost totally ionized) to 35 (retaining 28 electrons). We observe that the binary-encounter-peak energy for fixed q increases as Z increases. This trend is opposite to that observed when Z is fixed and the charge q is varied, and it demonstrates that the binary-encounter-peak energy depends not only on the net projectile charge but on the projectile core as well. The experimental trend is qualitatively reproduced by an impulse approximation showing that this variation in the binary-encounter-peak energy may be attributed to the effect that the projectile core potential has on the electron elastic-scattering cross section. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Oak Ridge National Laboratory
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 434304
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 55; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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