ASTM E668-05

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:E668–05
Standard Practice for
Application of Thermoluminescence-Dosimetry (TLD)
Systems for Determining Absorbed Dose in Radiation-
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Hardness Testing of Electronic Devices
This standard is issued under the fixed designation E668; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 Thispracticecoversproceduresfortheuseofthermolu-
minescencedosimeters(TLDs)todeterminetheabsorbeddose
2. Referenced Documents
in a material irradiated by ionizing radiation. Although some
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2.1 ASTM Standards:
elements of the procedures have broader application, the
E170 TerminologyRelatingtoRadiationMeasurementsand
specific area of concern is radiation-hardness testing of elec-
Dosimetry
tronic devices. This practice is applicable to the measurement
E380 Practice for Use of the International System of Units
of absorbed dose in materials irradiated by gamma rays, X
(SI) (the Modernized Metric System)
rays, and electrons of energies from 12 to 60 MeV. Specific
E666 PracticeforCalculatingAbsorbedDoseFromGamma
energy limits are covered in appropriate sections describing
or X Radiation
specific applications of the procedures. The range of absorbed
−2 4 6
2.2 International Commission on Radiation Units and
dose covered is approximately from 10 to 10 Gy (1 to 10
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Measurements (ICRU) Reports:
rad), and the range of absorbed dose rates is approximately
−2 10 12
ICRU Report 14—Radiation Dosimetry: X Rays and
from 10 to 10 Gy/s (1 to 10 rad/s). Absorbed dose and
Gamma Rays with Maximum Photon Energies Between
absorbed dose-rate measurements in materials subjected to
0.6 and 50 MeV
neutronirradiationarenotcoveredinthispractice.Further,the
ICRU Report 17—Radiation Dosimetry: X Rays Generated
portion of these procedures that deal with electron irradiation
at Potentials of 5 to 150 keV
are primarily intended for use in parts testing. Testing of
ICRUReport 21—RadiationDosimetry:ElectronswithIni-
devices as a part of more massive components such as
tial Energies Between 1 and 50 MeV
electronics boards or boxes may require techniques outside the
ICRU Report 31—Average Energy Required to Produce an
scope of this practice.
Ion Pair
NOTE 1—The purpose of the upper and lower limits on the energy for
ICRU Report 33—Radiation Quantities and Units
electron irradiation is to approach a limiting case where dosimetry is
ICRU Report 34—The Dosimetry of Pulsed Radiation
simplified.Specifically,thedosimetrymethodologyspecifiedrequiresthat
ICRU Report 37—Stopping Powers for Electrons and
the following three limiting conditions be approached: (a) energy loss of
Positrons
the primary electrons is small, (b) secondary electrons are largely stopped
within the dosimeter, and (c) bremsstrahlung radiation generated by the
3. Terminology
primary electrons is largely lost.
3.1 Definitions:
1.2 This standard dose not purport to address all of the
3.1.1 absorbeddose,D—thequotientofd´¯bydm,whered´¯
safety concerns, if any, associated with its use. It is the
isthemeanenergyimpartedbyionizingradiationtothematter
responsibility of the user of this standard to establish appro-
in a volume element and dm is the mass of matter in that
volume element.
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This practice is under the jurisdiction of ASTM Committee E10 on Nuclear
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Technology and Applications and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
E10.07 on Radiation Dosimetry for Radiation Effects on Materials and Devices on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Materials and Devices. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2005. Published June 2005. Originally the ASTM website.
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approved in 1978. Last previous edition approved in 2000 as E668–00. DOI: Available from International Commission on Radiation Units and Measure-
10.1520/E0668-05. ments, 7910, Woodmont Ave., Suite 800, Bethesda, MD 20814.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E668–05
d´¯
material being irradiated. This interaction is a principal means
D 5 (1)
dm
of energy loss for the primary electrons. The kinetic energy of
a secondary electron is typically much lower than that of the
Previously, the special unit of absorbed dose was the r
...