gov.nist.microanalysis.EPQLibrary
Class BetheElectronEnergyLoss

java.lang.Object
  gov.nist.microanalysis.EPQLibrary.AlgorithmClass
      gov.nist.microanalysis.EPQLibrary.BetheElectronEnergyLoss

All Implemented Interfaces:

java.lang.Comparable

public abstract class BetheElectronEnergyLoss
extends AlgorithmClass

This class provides various different implementations for the electron energy loss expression in the form first described by Bethe.

Copyright: Pursuant to title 17 Section 105 of the United States Code this software is not subject to copyright protection and is in the public domain

Institution: National Institute of Standards and Technology

Version:

1.0

Author:

Nicholas W. M. Ritchie

Field Summary

static BetheElectronEnergyLoss	Bethe1930 Bethe1930 - The original expression of Bethe for the stopping power adjusted so that even when the electron energy falls below about J/1.166, the electron continues to decelerate (albeit slowly).
static BetheElectronEnergyLoss	Bethe1930Strict Bethe1930Strict - The original expression of Bethe for the stopping power.
static BetheElectronEnergyLoss	JoyLuo1989 JoyLuo1989 - Joy & Luo's modification to the Bethe expression to improve the applicability at low-beam energies.

Constructor Summary

protected

BetheElectronEnergyLoss(java.lang.String name, Reference ref) Constructs a BetheElectronEnergyLoss

Method Summary

abstract double	compute(Element elm, double eB) compute - Computes dE/ds in Joules/meter per kg/meter^3
java.util.List	getAllImplementations() getAllImplementations - Returns a list of all implementations of the derived algorithm class.
protected void	initializeDefaultStrategy() initializeDefaultStrategy - Implement this method in derived classes to specify the contents (possibly null) of the default Strategy using the addDefaultAlgorithm(Class,AlgorithmClass) method.

Methods inherited from class gov.nist.microanalysis.EPQLibrary.AlgorithmClass

addDefaultAlgorithm, allAlgorithmNames, allAlgorithms, applyGlobalOverride, clearGlobalOverride, compareTo, documentStrategy, getActiveStrategy, getAlgorithm, getAlgorithmClass, getName, getReference, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

JoyLuo1989

public static BetheElectronEnergyLoss JoyLuo1989

JoyLuo1989 - Joy & Luo's modification to the Bethe expression to improve the applicability at low-beam energies. (As described in Scanning Electron Microscopy and X-ray Microanalysis (3rd edition))

Bethe1930

public static BetheElectronEnergyLoss Bethe1930

Bethe1930 - The original expression of Bethe for the stopping power adjusted so that even when the electron energy falls below about J/1.166, the electron continues to decelerate (albeit slowly).

Bethe1930Strict

public static BetheElectronEnergyLoss Bethe1930Strict

Bethe1930Strict - The original expression of Bethe for the stopping power. Below eB = J/1.166 the energy loss goes positive (the electron shows unphysical acceleration.)

Constructor Detail

BetheElectronEnergyLoss

protected BetheElectronEnergyLoss(java.lang.String name,
                                  Reference ref)

Constructs a BetheElectronEnergyLoss

Method Detail

getAllImplementations

public java.util.List getAllImplementations()

Description copied from class: AlgorithmClass

getAllImplementations - Returns a list of all implementations of the derived algorithm class. Typically this method is implemented by the abstract base class from which more specific implementations are derived.

Specified by:

getAllImplementations in class AlgorithmClass

Returns:

List

initializeDefaultStrategy

protected void initializeDefaultStrategy()

Description copied from class: AlgorithmClass

initializeDefaultStrategy - Implement this method in derived classes to specify the contents (possibly null) of the default Strategy using the addDefaultAlgorithm(Class,AlgorithmClass) method.

Specified by:

initializeDefaultStrategy in class AlgorithmClass

compute

public abstract double compute(Element elm,
                               double eB)

compute - Computes dE/ds in Joules/meter per kg/meter^3

Parameters:

elm - An element

eB - The electron energy (in Joules)

Returns:

dE/ds in Joules per meter per kg/meter^3