Proton stopping power of aluminum ions

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

DOI:https://doi.org/10.1103/PhysRevA.26.1318· OSTI ID:6522941

McGuire, E J; Peek, J M; Pitchford, L C

With the use of the generalized-oscillator-strength formulation of the plane-wave Born approximation, the contribution of individual subshell ionization and excitation to the proton stopping power is calculated for Al/sup n/+ (0< or =n< or =11) for proton energies between 0.1 and 100 MeV. The neutral-Al results are in excellent agreement with experiment. The subshell-peak stopping power due to ionization is in excellent agreement with scaled neutral-atom values. The optical oscillator strength was used to calculate the Bethe mean-excitation energy I for all the Al ions. Equating the explicitly calculated stopping power at 100 MeV to the Bethe formula led to an alternative I value. While the two I values agreed for some ions, for others they disagreed by as much as 50%. However, even in such cases, a change of less than 10% in the stopping power at 100 MeV would produce agreement between the two methods of calculating I.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico 87185
• OSTI ID: 6522941
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 26:3; 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
ALUMINIUM
ALUMINIUM IONS
BARYONS
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE TRANSPORT
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
INNER-SHELL IONIZATION
IONIZATION
IONS
METALS
NUCLEONS
OSCILLATOR STRENGTHS
PROTONS
RADIATION TRANSPORT
STOPPING POWER