Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Anomalies in the Electronic Stopping of Slow Antiprotons in LiF

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [3]
  1. Universidad Nacional Autónoma de Mexico (Mexico)
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  3. CIC Nanogune and DIPC, San Sebastian (Spain); Ikerbasque, Bilbao (Spain); University of Cambridge (United Kingdom)
+ Show Author Affiliations
We present first-principles theoretical calculations for the electronic stopping power (SP) of both protons and antiprotons in LiF. Our results show the presence of the Barkas effect: a higher stopping for positively charged particles than their negatively charged antiparticles. In contrast, a previous study has predicted an anti-Barkas effect (higher stopping for negative charges) at low velocity [Qi, Bruneval and Maliyov, Phys. Rev. Lett. 128, 043401 (2022)]. Here, we explain this discrepancy by showing that this anti-Barkas effect appears for highly symmetric trajectories and disappears when considering trajectories that better reproduce the experimental setup. Our low-velocity results show that the SP of both protons and antiproton vanish for velocities under 0.1 a.u.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
European Commission Horizon MSCA-SE Project MAMBA; María de Maeztu award; Spanish MCIN; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
2586691
Report Number(s):
LLNL--JRNL-2010195
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 134; ISSN 1079-7114; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (31)

Calculating electronic stopping power in materials from first principles journal July 2018
Massively parallel first-principles simulation of electron dynamics in materials journal August 2017
SRIM – The stopping and range of ions in matter (2010)
  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.091
journal June 2010
Electronic stopping power of H and He in Al and LiF from first principles journal May 2013
Accelerating multiscale electronic stopping power predictions with time-dependent density functional theory and machine learning journal September 2024
Propagators for the time-dependent Kohn–Sham equations journal August 2004
Efficient ab initio calculation of electronic stopping in disordered systems via geometry pre-sampling: Application to liquid water journal July 2020
TL response of LiF : Mg,Ti exposed to intermediate energy1H,3He,12C,16O and20Ne ions journal April 2007
Electronic stopping in insulators: a simple model journal June 2007
On the role of magnesium in a LiF:Mg,Ti thermoluminescent dosimeter journal December 2018
Mass-Ratio Method Applied to the Measurement ofL-Meson Masses and the Energy Balance in Pion Decay journal January 1956
Stopping Cross Section of Solids for Protons, 50-600 kev journal July 1956
The Capture of Negative Mesotrons in Matter journal September 1947
Measurements of Meson Masses and Related Quantities journal August 1953
Vanishing gap in LiF for electronic excitations by slow antiprotons journal March 2009
Optimized norm-conserving Vanderbilt pseudopotentials journal August 2013
Electronic stopping power in a narrow band gap semiconductor from first principles journal March 2015
Ab initio electronic stopping power of protons in bulk materials journal January 2016
Adiabatic perturbation theory of electronic stopping in insulators journal June 2016
Vanishing Electronic Energy Loss of Very Slow Light Ions in Insulators with Large Band Gaps journal September 2009
Electron Elevator: Excitations across the Band Gap via a Dynamical Gap State journal January 2016
Core Electrons in the Electronic Stopping of Heavy Ions journal September 2018
Ab Initio Prediction of a Negative Barkas Coefficient for Slow Protons and Antiprotons in LiF journal January 2022
Measurement of theZ13contribution to the stopping power using MeV protons and antiprotons: The Barkas effect journal April 1989
Generalized Gradient Approximation Made Simple journal October 1996
Stopping Power in Insulators and Metals without Charge Exchange journal July 2004
Apparent Velocity Threshold in the Electronic Stopping of Slow Hydrogen Ions in LiF journal September 2005
Electronic Stopping Power in LiF from First Principles journal December 2007
Floquet theory for the electronic stopping of projectiles in solids journal July 2020
Thermoluminescence as a Research Tool journal April 1953
Penetration of Protons, Alpha Particles, and Mesons journal December 1963

Similar Records

Electronic Stopping Power in LiF from First Principles
Journal Article · Thu Dec 06 23:00:00 EST 2007 · Physical Review Letters · OSTI ID:21024545
Apparent Velocity Threshold in the Electronic Stopping of Slow Hydrogen Ions in LiF
Journal Article · Fri Sep 09 00:00:00 EDT 2005 · Physical Review Letters · OSTI ID:20699418
Antiproton slowing down inH[sub 2] and He and evidence of nuclear stopping power
Journal Article · Sun Jan 15 23:00:00 EST 1995 · Physical Review Letters; (United States) · OSTI ID:6578295

Related Subjects

3-dimensional systems
Atomic & molecular collisions
Electronic excitation & ionization
First-principles calculations
Irradiation