Coulomb effect and threshold effect in electronic stopping power for slow protons

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

DOI:https://doi.org/10.1103/PhysRevA.33.1646· OSTI ID:6090632

Semrad, D

We show how the electronic stopping power for slow protons is influenced by the deceleration and deflection of the projectile in the field of the target nucleus (Coulomb effect) and by the fact that in insulators a finite energy is also required for excitation of the outermost electrons (threshold effect). Estimates are derived from the Fermi-Teller description of the stopping process, from a modified local-density approximation, and from measured inner-shell ionization cross sections. It is found that the introduction of an energy threshold reduces at low energies the stopping cross section by a large factor and hence leads to an appreciable deviation from v/sub 1/ proportionality.

• Research Organization: Institut fuer Experimentalphysik, Johannes-Kepler-Universitat Linz, A-4040 Linz, Austria
• OSTI ID: 6090632
• Journal Information: Phys. Rev. A; (United States), Vol. 33:3
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
PROTONS
STOPPING POWER
METALS
BARYONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
NUCLEONS
654001* - Radiation & Shielding Physics- Radiation Physics
Shielding Calculations & Experiments