Energy loss of protons and helium ions passing through matter

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.33.1602· OSTI ID:5978087

Kaneko, T

Based on the dielectric-function method, together with the use of local-electron-density models (LEDM's), the stopping powers of solid materials for the proton and helium-ion beams are investigated over a wide specific energy range from 1 keV/amu to 2.5 x 10/sup 3/ keV/amu. The screening effect due to free electrons on ions with bound electrons is taken into account within the framework of the linear response. For a H/sup 0/ atom in alkali metals, the screening effect increases significantly the stopping powers, while for a He/sup +/ ion it does not increase so much. The mean excitation energy is also calculated using the solid and the atomic LEDM's. For a Ag target, not being a simple metal, we report how much the change in the number of free electrons affects the stopping cross section for a H/sup +/ ion. The charge-state distribution (CSD) suggested from the master curves of compiled stopping data is in agreement with the observed CSD. The calculated energy dependence of the effective charge of the helium-ion beams reproduces experimental data well.

• Research Organization: Department of Applied Physics, Okayama University of Science, Ridai-cho 1-1, Okayama 700, Japan
• OSTI ID: 5978087
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 33:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
EFFECTIVE CHARGE
ELECTRON-ION COUPLING
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
HELIUM IONS
IONS
MEV RANGE
MEV RANGE 01-10
NUCLEONS
PROTONS
RADIATION TRANSPORT
SCREENING
SOLIDS
STOPPING POWER