Significance and Use

When electron beam excitation is used in AES, the incident electron beam can interact with the specimen material causing physical and chemical changes. In general, these effects are a hindrance to AES analysis because they cause localized specimen modification (1-4) .

With specimens that have poor electrical conductivity the electron beam can stimulate the development of localized charge on the specimen surface. This effect is a hindrance to AES analysis because the potentials associated with the charge can either adversely affect the integrity of Auger data or make Auger data collection difficult (5, 6) .

1. Scope

1.1 This guide outlines the origins and manifestations of unwanted electron beam effects in Auger electron spectroscopy (AES).

1.2 Some general guidelines are provided concerning the electron beam parameters which are most likely to produce these effects and suggestions are offered on how to minimize them.

1.3 General classes of materials are identified which are most likely to exhibit unwanted electron beam effects. In addition, a tabulation of some specific materials which have been observed to undergo electron damage effects is provided.

1.4 A simple method is outlined for establishing the existence and extent of these effects during routine AES analysis.

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

E673 Terminology Relating to Surface Analysis

E996 Practice for Reporting Data in Auger Electron Spectroscopy and X-ray Photoelectron Spectroscopy

Keywords

Auger electron spectroscopy; charging; electron beam; electron beam damage; Auger electron spectroscopy (AES); Electron beam; Electron radiation; Energy deposition--electron radiation; Surface analysis--spectrochemical analysis; Unwanted electron beam effects;

ICS Code

ICS Number Code 17.180.30 (Optical measuring instruments)

DOI: 10.1520/E0983-10

ASTM International is a member of CrossRef.

ASTM E983