Partial stopping power and straggling effective charges of heavy ions in condensed matter
- Department of Physics, The University of Newcastle, New South Wales 2308 (Australia)
The stopping-power effective charge (SPEC) has been formulated in the Brandt-Kitagawa (BK) model. In the effective-charge theory, the stopping power of heavy ions can be obtained by scaling using the SPEC with a mean charge state. Based on the BK treatment for the statistical ion screening and the dielectric function, a formula for the straggling effective charge (SGEC) has been obtained. The SGEC, which is different from the SPEC, provides the scaling of collisional (without charge exchange) straggling in the effective-charge theory. To properly describe the stopping power and straggling of heavy projectiles in condensed matter, partial effective charges (PEC's) are introduced to describe the charge-state-dependent stopping power and straggling in a charge-state model. The partial stopping power and straggling of projectiles with a fixed charge state can be obtained by scaling to those of the bare nucleus with related PEC's. This allows the calculation of the total stopping power and straggling of heavy projectiles in a charge-state description including the charge-exchange effect.
- OSTI ID:
- 5223917
- Journal Information:
- Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:2; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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