The Inadequacies of Damage Energy as a Measure of Displacement Damage

Abstract

The Lindhard, Nielson, Scharff and Thompson equations for the partitioning of an ion's energy into electronic and damage portions are widely used to estimate the number of displacements produced in a solid by an impinging ion. We have extended the LNST approach by including a displacement energy at all stages of the calculation, which allows us to form an integral equation that yields the number of displacements Nv(E) directly, rather than estimating it from the damage energy D(E). We compare our results with both the LNST approach and with the collision simulation code MARLOWE. We find that our approach approximates the MARLOWE results reasonably well, but the the damage energy is a poor estimator of displacement damage, because Nv(E) and D(E) have different dependencies on the interatomic potential and on the low energy portion of the inelastic loss function. Keywords: Displacement; Damage energy.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 10, 1989
Accession Number
ADA207376

Entities

People

  • G. P. Mueller

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Availability
  • Classification
  • Collisions
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Differential Cross Sections
  • Energy
  • Energy Transfer
  • Equations
  • Integral Equations
  • Materials
  • Military Research
  • Radiation
  • Scattering
  • Security
  • Subatomic Particles

Fields of Study

  • Physics

Readers

  • Computer Engineering
  • Explosive Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • AI & ML - Machine Learning Algorithms
  • Microelectronics