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Title: Electronic stopping power of protons and alpha particles in nickel

Journal Article · · Physical Review B
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The electronic stopping power of nickel for protons and alpha particles at velocities below and around the Fermi velocity has been obtained to high accuracy using time-dependent density functional theory. For the wide range of projectile velocities considered, we observed di erent regimes of electronic stopping due to the alternative participation of s- and d-band electrons. Despite the sharp discontinuity in the electronic density of states near the Fermi energy characteristic of the nickel band structure, we do not nd an anomalous non-linear electronic stopping power limit as a function of velocity. However, we nd a crossover region above v = 0:15 a:u: both for protons and alpha particles, related to the increase in participating host electrons and, in the case of alpha particles, to an increase of the charge state. We compare our calculated results with widely available experimental data and analyze the low velocity limits in the context of Lindhard's linear response theory and previous non-linear density functional calculations. The comparison shows good accord with the lowest velocity experiments available. This may indicate that the adiabatic local density approximation is already a good theory to calculate electronic stopping power in materials at low velocity.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; AC05-00OR22725
OSTI ID:
1497313
Alternate ID(s):
OSTI ID: 1485199
Report Number(s):
LLNL-JRNL-749644; PRBMDO; 933887
Journal Information:
Physical Review B, Vol. 98, Issue 23; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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