gov.nist.microanalysis.EPQLibrary
Class NISTMottScatteringAngle

java.lang.Object
  gov.nist.microanalysis.EPQLibrary.NISTMottScatteringAngle

All Implemented Interfaces:

IRandomizedScatter

public class NISTMottScatteringAngle
extends java.lang.Object
implements IRandomizedScatter

A series of tools for electron probe quantitation.

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

Company: National Institute of Standards and Technology

Version:

1.0

Author:

Nicholas W. M. Ritchie

Field Summary

static double

MAX_NISTMOTT

Constructor Summary

NISTMottScatteringAngle(Element elm)
NISTMottScatteringAngle - Creates an object representing the NIST SRD 64 method for computing random scattering angles using Mott cross sections.

Method Summary

Element	getElement() getElement - Returns the element with which this cross section is associated.
double	randomScatteringAngle(double energy) randomScatteringAngle - Returns a randomized scattering angle in the range [0,PI] that comes from the distribution of scattering angles for an electron of specified energy on an atom of the element represented by the instance of this class.
java.lang.String	toString() toString
double	totalCrossSection(double energy) totalCrossSection - Computes the total cross section for an electron of the specified energy.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NISTMOTT

public static final double MAX_NISTMOTT

Constructor Detail

NISTMottScatteringAngle

public NISTMottScatteringAngle(Element elm)

NISTMottScatteringAngle - Creates an object representing the NIST SRD 64 method for computing random scattering angles using Mott cross sections. The constructor loads a table of numbers which are used to quickly compute cross sections for any energy in the range 50 eV to 20,000 eV.

Parameters:

elm - Element

Method Detail

toString

public java.lang.String toString()

toString

Overrides:

toString in class java.lang.Object

Returns:

String (non-Javadoc)

See Also:

Object.toString()

getElement

public Element getElement()

Description copied from interface: IRandomizedScatter

getElement - Returns the element with which this cross section is associated.

Specified by:

getElement in interface IRandomizedScatter

Returns:

Element

totalCrossSection

public final double totalCrossSection(double energy)

totalCrossSection - Computes the total cross section for an electron of the specified energy.

Specified by:

totalCrossSection in interface IRandomizedScatter

Parameters:

energy - double - In Joules

Returns:

double - in square meters

randomScatteringAngle

public final double randomScatteringAngle(double energy)

randomScatteringAngle - Returns a randomized scattering angle in the range [0,PI] that comes from the distribution of scattering angles for an electron of specified energy on an atom of the element represented by the instance of this class.

Specified by:

randomScatteringAngle in interface IRandomizedScatter

Parameters:

energy - double - In Joules

Returns:

double - an angle in radians