Stopping power of some lightly ionized gold ions for protons

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.26.1871· OSTI ID:6364133

McGuire, E J

Calculations are presented for the stopping power of Au/sup n/+ (0< or =n< or =11) for protons with energy between 0.1 and 10 MeV. Over this range the proton stopping power changes by at least a factor of 2 between neutral and 11 times ionized gold. Explicit Born-approximation calculations are done for both excitation (for all ions considered) and ionization (for selected ions). For inner shells (nl< or =4d) the explicit calculations are in excellent agreement with results obtained from scaling laws. For outer shells (nl> or =4f) there are differences of as much as a factor of 2 between the explicit calculations and the scaling laws for some subshells of some ions. A correction to the scaling laws using an integral over optical oscillator strength is developed which removes some of the disagreement between the explicit calculations and scaled values. The residual difference between the explicit calculations and the scaled values appears to arise from the spatial expansion of an ion subshell orbital compared to an atom subshell orbital even when the subshells have the same ionization energy.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6364133
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 26:4; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

654001* -- Radiation &amp; Shielding Physics-- Radiation Physics
Shielding Calculations &amp; Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOM COLLISIONS
BARYONS
BORN APPROXIMATION
CHARGED-PARTICLE TRANSPORT
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
GOLD
HADRONS
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
ION-ION COLLISIONS
IONIZATION
METALS
MEV RANGE
MEV RANGE 01-10
NUCLEONS
PROTONS
RADIATION TRANSPORT
STOPPING POWER
TRANSITION ELEMENTS