ISO/ASTM 51650:2013
(Main)Practice for use of a cellulose triacetate dosimetry system
Practice for use of a cellulose triacetate dosimetry system
ISO/ASTM 51650:2013 is a practice for using a cellulose triacetate (CTA) dosimetry system to measure absorbed dose in materials irradiated by photons or electrons in terms of absorbed dose to water. The CTA dosimetry system is classified as a routine dosimetry system. The CTA dosimeter is classified as a type II dosimeter on the basis of the complex effect of influence quantities on its response. ISO/ASTM 51650:2013 is one of a set of standards that provides recommendations for properly implementing dosimetry in radiation processing, and describes a means of achieving compliance with the requirements of ASTM E2628 for a CTA dosimetry system. It is intended to be read in conjunction with ASTM E2628.
Pratique de l'utilisation d'un système dosimétrique au triacétate de cellulose
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INTERNATIONAL ISO/ASTM
STANDARD 51650
Thirdedition
2013-06-01
Practice for use of a cellulose triacetate
dosimetry system
Pratique de l’utilisation d’un système dosimétrique au triacétate
de cellulose
Referencenumber
ISO/ASTM51650:2013(E)
©ISO/ASTMInternational2013
ISO/ASTM51650:2013(E)
©ISO/ASTMInternational2013
Allrightsreserved.Unlessotherwisespecified nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,
including photocopying and microfilm without permission in writing from either ISO at the address below or ISO’s member body in the country of the
requester.IntheUnitedStates,suchrequestsshouldbesenttoASTMInternational.
ISOcopyrightoffice ASTMInternational,100BarrHarborDrive,POBoxC700,
Casepostale56•CH-1211Geneva20 WestConshohocken,PA19428-2959,USA
Tel.+41227490111 Tel.+6108329634
Fax+41227490947 Fax+6108329635
E-mailcopyright@iso.org E-mailkhooper@astm.org
Webwww.iso.org Webwww.astm.org
PublishedinSwitzerland
ii ©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
Contents Page
1 Scope . 1
2 Referenceddocuments . 1
3 Terminology . 1
4 Significanc anduse . 2
5 Overview . 2
6 Influenc quantities . 2
7 Dosimetrysystem . 3
8 Incomingdosimeterstockassessment . 4
9 Calibration . 4
10 Routineuse . 4
11 Documentationrequirements . 4
12 Measurementuncertainty . 4
13 Keywords . 5
ANNEX . 5
Bibliography . 6
Table A1.1 BasicpropertiesofavailableCTAdosimeters . 5
Table A1.2 KnownsuppliersofCTAdosimeters . 5
Table A1.3 KnownsuppliersofCTAstripreadingequipment . 6
©ISO/ASTMInternational2013–Allrightsreserved iii
ISO/ASTM51650:2013(E)
Foreword
ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen
establishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentaland
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
InternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.
DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesfor
voting. Publication as an International Standard requires approval by at least 75% of the member bodies
castingavote.
ASTMInternationalisoneoftheworld’slargestvoluntarystandardsdevelopmentorganizationswithglobal
participation from affected stakeholders.ASTM technical committees follow rigorous due process balloting
procedures.
Apilot project between ISO andASTM International has been formed to develop and maintain a group of
ISO/ASTM radiation processing dosimetry standards. Under this pilot project, ASTM Committee
E61,RadiationProcessing,isresponsibleforthedevelopmentandmaintenanceofthesedosimetrystandards
withunrestrictedparticipationandinputfromappropriateISOmemberbodies.
Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatent
rights. Neither ISO norASTM International shall be held responsible for identifying any or all such patent
rights.
International Standard ISO/ASTM 51650 was developed byASTM Committee E61, Radiation Processing,
throughSubcommitteeE61.02,DosimetrySystems,andbyTechnicalCommitteeISO/TC85,Nuclearenergy,
nucleartechnologiesandradiologicalprotection.
This third edition cancels and replaces the second edition (ISO/ASTM51650:2005), which has been
technicallyrevised.
iv ©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
AnAmericanNationalStandard
Standard Practice for
Use of a Cellulose Triacetate Dosimetry System
This standard is issued under the fixed designation ISO/ASTM 51650; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision.
1. Scope E2628 Practice for Dosimetry in Radiation Processing
E2701 Guide for Performance Characterization of Dosim-
1.1 This is a practice for using a cellulose triacetate (CTA)
eters and Dosimetry Systems for Use in Radiation Process-
dosimetry system to measure absorbed dose in materials
ing
irradiated by photons or electrons in terms of absorbed dose to
2.2 ISO/ASTM Standards:
water. The CTA dosimetry system is classified as a routine
51261 Practice for Calibration of Routine Dosimetry Sys-
dosimetry system.
tems for Radiation Processing
1.2 The CTA dosimeter is classified as a type II dosimeter
51707 Guide for Estimating Uncertainties in Dosimetry for
on the basis of the complex effect of influence quantities on its
Radiation Processing
response (see ASTM Practice E2628).
2.3 International Commission on Radiation Units and
1.3 This document is one of a set of standards that provides
Measurements (ICRU) Reports:
recommendations for properly implementing dosimetry in
ICRU Report 85a Fundamental Quantities and Units for
radiation processing, and describes a means of achieving
Ionizing Radiation
compliance with the requirements of ASTM E2628 “Practice
ICRU Report 80 Dosimetry Systems for Use in Radiation
for Dosimetry in Radiation Processing” for a CTA dosimetry
Processing
system. It is intended to be read in conjunction with ASTM
2.4 Joint Committee for Guides in Metrology (JCGM)
E2628.
Reports:
1.4 This practice covers the use of CTA dosimetry systems
JCGM 100:2008, GUM 1995, with minor corrections,
under the following conditions:
Evaluation of measurement data – Guide to the Expres-
1.4.1 The absorbed dose range is 10 kGy to 300 kGy.
sion of Uncertainty in Measurement
1.4.2 The absorbed-dose rate range is 3 Gy/s to 4310
JCGM 200:2008, VIM, International vocabulary of metrol-
Gy/s (1).
ogy – Basis and general concepts and associated terms
1.4.3 The photon energy range is 0.1 to 50 MeV.
1.4.4 The electron energy range is 0.2 to 50 MeV.
3. Terminology
1.5 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 absorbed-dose mapping—measurement of absorbed
responsibility of the user of this standard to establish appro-
dose within an irradiated product to produce a one-, two- or
priate safety and health practices and determine the applica-
three-dimensionaldistributionofabsorbeddose,thusrendering
bility of regulatory limitations prior to use.
a map of absorbed-dose values.
2. Referenced documents 3.1.1.1 Discussion—The CTA dosimeter strip with appro-
priate length provides the opportunity for high resolution
2.1 ASTM Standards:
measurement of dose distribution, such as depth dose distribu-
E170 TerminologyRelatingtoRadiationMeasurementsand
tion.
Dosimetry
·
E275 Practice for Describing and Measuring Performance
3.1.2 absorbed-dose rate (D)—absorbed dose in a material
of Ultraviolet and Visible Spectrophotometers
per incremental time interval, i.e., the quotient of dD by dt.
-1
Also see E170. The SI unit is Gy s . (ICRU-60, 4.2.6)
˙
D 5 dD/dt (1)
This practice is under the jurisdiction of ASTM Committee E61 on Radiation
3.1.2.1 Discussion—(1) The absorbed-dose rate is often
Processing and is the direct responsibility of Subcommittee E61.02 on Dosimetry
specified in terms of its average value over longer time
Systems, and is also under the jurisdiction of ISO/TC 85/WG 3.
-1 -1
intervals, for example, in units of Gy·min or Gy·h . (2) In
Current edition approved by April 9, 2013. Published June 2013. Originally
published as ASTM E 1650–94 with title: Practice for Use of Cellulose Acetate
Dosimetry Systems. ASTM E 1650–94 was adopted by ISO in 1998 with the
intermediate designation ISO 15570:1998(E). The present Third Edition of Inter-
national Standard ISO/ASTM 51650:2013(E) is a major revision of the Second Available from the International Commission on Radiation Units and Measure-
Edition of ISO/ASTM 51650:2005(E). ments, 7910 Woodmont Ave., suite 800, Bethesda, MD 20814, USA.
2 5
The boldface numbers in parentheses refer to the bibliography at the end of this Document produced by Working Group 1 of the Joint Committee for Guides in
standard. Metrology (JCGM/WG 1). Available free of charge at the BIPM website (http://
For referenced ASTM and ISO/ASTM standards, visit the ASTM website, www.bipm.org).
www.astm.org, or contact ASTM Customer Service at service@astm.org. For Document produced by Working Group 2 of the Joint Committee for Guides in
Annual Book of ASTM Standards volume information, refer to the standard’s Metrology (JCGM/WG 2). Available free of charge at the BIPM website (http://
Document Summary page on the ASTM website. www.bipm.org).
©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
gamma industrial irradiators, dose rate may be significantly 4.2 CTAdosimetrysystemsarecommonlyusedinindustrial
different at different locations. (3) In electron-beam irradiators radiation processing, for example in the modification of poly-
with pulsed or scanned beam, there are two types of dose rate: mers and sterilization of health care products.
average value over several pulses (scans) and instantaneous 4.3 CTA dosimeter film is particularly useful in absorbed
value within a pulse (scan). These two values can be signifi- dose mapping because it is available in a strip format and if
cantly different. measured using a strip measurement device, it can provide a
3.1.3 calibration curve—expression of the relation between dose map with higher resolution than using discrete points.
indication and corresponding measured quantity value.
5. Overview
(VIM:2008)
3.1.3.1 Discussion—In radiation processing standards, the
5.1 CTA dosimeters are manufactured by casting cellulose
term “dosimeter response” is generally used for “indication”.
triacetate with a plasticizer, triphenylphosphate, and solvents,
3.1.4 cellulose triacetate dosimeter—piece of CTA film for example, a methylene chloride–methanol mixture (5, 11).
that, during exposure to ionizing radiation, exhibits a quanti-
5.2 The commercially available dosimeter film is in the
fiable change in specific net absorbance as a function of format of 8 mm width and 100 m length rolled on a spool,
absorbed dose.
which is described in the informative annex.
5.3 Ionizing radiation induces chemical reactions in CTA
3.1.5 dosimeter—device that, when irradiated, exhibits a
quantifiable change that can be related to absorbed dose in a and the plasticizer, which create or enhance optical absorption
bands in the ultraviolet regions of the spectrum. Optical
given material using appropriate measurement instruments and
procedures. absorbance at appropriate wavelengths within these radiation-
induced absorption bands is quantitatively related to the
3.1.6 dosimeter batch—quantity of dosimeters made from a
absorbed dose. ICRU Report 80 provides information on the
specific mass of material with uniform composition, fabricated
scientific basis and historical development of the CTA dosim-
in a single production run under controlled, consistent condi-
etry systems in current use.
tions, and having a unique identification code.
5.4 The difference between the specific net absorbance of
3.1.7 dosimeter response—reproducible, quantifiable effect
un-irradiated and irradiated CTA dosimeter depends signifi-
produced in the dosimeter by ionizing radiation.
cantly on the analysis wavelength used to make the absorbance
3.1.7.1 Discussion—For CTA dosimeters, the specific net
measurement. Typically, the manufacturer recommends the
absorbance is the dosimeter response.
analysis wavelength that optimizes sensitivity and post-
3.1.8 dosimeter stock—partofadosimeterbatchheldbythe
irradiation stability. The analysis wavelengths recommended
user.
for some commonly used systems are given in Table A1.1.
3.1.9 measurement management system—set of interrelated
or interacting elements necessary to achieve metrological
6. Influence quantities
confirmation and continual control of measurement processes.
6.1 Factors other than absorbed dose which influence the
3.1.10 reference standard dosimetry system—dosimetry
dosimeter response are referred to as influence quantities.
system, generally having the highest metrological quality
These influence quantities include those related to the dosim-
available at a given location or in a given organization, from
eterbefore,during,andafterirradiationandthoserelatedtothe
which measurements made there are derived.
dosimeter response measurements (see ASTM Guide E2701).
3.1.11 response—see dosimeter response.
Influence quantities affecting dosimeter response are discussed
3.1.12 routine dosimetry system—dosimetry system cali-
below.
brated against a reference standard dosimetry system and used
6.2 Pre-Irradiation Conditions:
for routine absorbed dose measurements, including dose map-
6.2.1 Dosimeter Con
...
INTERNATIONAL ISO/ASTM
STANDARD 51650
Thirdedition
2013-06-01
Practice for use of a cellulose triacetate
dosimetry system
Pratique de l’utilisation d’un système dosimétrique au triacétate
de cellulose
Referencenumber
ISO/ASTM51650:2013(E)
©ISO/ASTMInternational2013
ISO/ASTM51650:2013(E)
©ISO/ASTMInternational2013
Allrightsreserved.Unlessotherwisespecified nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,
including photocopying and microfilm without permission in writing from either ISO at the address below or ISO’s member body in the country of the
requester.IntheUnitedStates,suchrequestsshouldbesenttoASTMInternational.
ISOcopyrightoffice ASTMInternational,100BarrHarborDrive,POBoxC700,
Casepostale56•CH-1211Geneva20 WestConshohocken,PA19428-2959,USA
Tel.+41227490111 Tel.+6108329634
Fax+41227490947 Fax+6108329635
E-mailcopyright@iso.org E-mailkhooper@astm.org
Webwww.iso.org Webwww.astm.org
PublishedinSwitzerland
ii ©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
Contents Page
1 Scope . 1
2 Referenceddocuments . 1
3 Terminology . 1
4 Significanc anduse . 2
5 Overview . 2
6 Influenc quantities . 2
7 Dosimetrysystem . 3
8 Incomingdosimeterstockassessment . 4
9 Calibration . 4
10 Routineuse . 4
11 Documentationrequirements . 4
12 Measurementuncertainty . 4
13 Keywords . 5
ANNEX . 5
Bibliography . 6
Table A1.1 BasicpropertiesofavailableCTAdosimeters . 5
Table A1.2 KnownsuppliersofCTAdosimeters . 5
Table A1.3 KnownsuppliersofCTAstripreadingequipment . 6
©ISO/ASTMInternational2013–Allrightsreserved iii
ISO/ASTM51650:2013(E)
Foreword
ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen
establishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentaland
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
InternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.
DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesfor
voting. Publication as an International Standard requires approval by at least 75% of the member bodies
castingavote.
ASTMInternationalisoneoftheworld’slargestvoluntarystandardsdevelopmentorganizationswithglobal
participation from affected stakeholders.ASTM technical committees follow rigorous due process balloting
procedures.
Apilot project between ISO andASTM International has been formed to develop and maintain a group of
ISO/ASTM radiation processing dosimetry standards. Under this pilot project, ASTM Committee
E61,RadiationProcessing,isresponsibleforthedevelopmentandmaintenanceofthesedosimetrystandards
withunrestrictedparticipationandinputfromappropriateISOmemberbodies.
Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatent
rights. Neither ISO norASTM International shall be held responsible for identifying any or all such patent
rights.
International Standard ISO/ASTM 51650 was developed byASTM Committee E61, Radiation Processing,
throughSubcommitteeE61.02,DosimetrySystems,andbyTechnicalCommitteeISO/TC85,Nuclearenergy,
nucleartechnologiesandradiologicalprotection.
This third edition cancels and replaces the second edition (ISO/ASTM51650:2005), which has been
technicallyrevised.
iv ©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
AnAmericanNationalStandard
Standard Practice for
Use of a Cellulose Triacetate Dosimetry System
This standard is issued under the fixed designation ISO/ASTM 51650; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision.
1. Scope E2628 Practice for Dosimetry in Radiation Processing
E2701 Guide for Performance Characterization of Dosim-
1.1 This is a practice for using a cellulose triacetate (CTA)
eters and Dosimetry Systems for Use in Radiation Process-
dosimetry system to measure absorbed dose in materials
ing
irradiated by photons or electrons in terms of absorbed dose to
2.2 ISO/ASTM Standards:
water. The CTA dosimetry system is classified as a routine
51261 Practice for Calibration of Routine Dosimetry Sys-
dosimetry system.
tems for Radiation Processing
1.2 The CTA dosimeter is classified as a type II dosimeter
51707 Guide for Estimating Uncertainties in Dosimetry for
on the basis of the complex effect of influence quantities on its
Radiation Processing
response (see ASTM Practice E2628).
2.3 International Commission on Radiation Units and
1.3 This document is one of a set of standards that provides
Measurements (ICRU) Reports:
recommendations for properly implementing dosimetry in
ICRU Report 85a Fundamental Quantities and Units for
radiation processing, and describes a means of achieving
Ionizing Radiation
compliance with the requirements of ASTM E2628 “Practice
ICRU Report 80 Dosimetry Systems for Use in Radiation
for Dosimetry in Radiation Processing” for a CTA dosimetry
Processing
system. It is intended to be read in conjunction with ASTM
2.4 Joint Committee for Guides in Metrology (JCGM)
E2628.
Reports:
1.4 This practice covers the use of CTA dosimetry systems
JCGM 100:2008, GUM 1995, with minor corrections,
under the following conditions:
Evaluation of measurement data – Guide to the Expres-
1.4.1 The absorbed dose range is 10 kGy to 300 kGy.
sion of Uncertainty in Measurement
1.4.2 The absorbed-dose rate range is 3 Gy/s to 4310
JCGM 200:2008, VIM, International vocabulary of metrol-
Gy/s (1).
ogy – Basis and general concepts and associated terms
1.4.3 The photon energy range is 0.1 to 50 MeV.
1.4.4 The electron energy range is 0.2 to 50 MeV.
3. Terminology
1.5 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 absorbed-dose mapping—measurement of absorbed
responsibility of the user of this standard to establish appro-
dose within an irradiated product to produce a one-, two- or
priate safety and health practices and determine the applica-
three-dimensionaldistributionofabsorbeddose,thusrendering
bility of regulatory limitations prior to use.
a map of absorbed-dose values.
2. Referenced documents 3.1.1.1 Discussion—The CTA dosimeter strip with appro-
priate length provides the opportunity for high resolution
2.1 ASTM Standards:
measurement of dose distribution, such as depth dose distribu-
E170 TerminologyRelatingtoRadiationMeasurementsand
tion.
Dosimetry
·
E275 Practice for Describing and Measuring Performance
3.1.2 absorbed-dose rate (D)—absorbed dose in a material
of Ultraviolet and Visible Spectrophotometers
per incremental time interval, i.e., the quotient of dD by dt.
-1
Also see E170. The SI unit is Gy s . (ICRU-60, 4.2.6)
˙
D 5 dD/dt (1)
This practice is under the jurisdiction of ASTM Committee E61 on Radiation
3.1.2.1 Discussion—(1) The absorbed-dose rate is often
Processing and is the direct responsibility of Subcommittee E61.02 on Dosimetry
specified in terms of its average value over longer time
Systems, and is also under the jurisdiction of ISO/TC 85/WG 3.
-1 -1
intervals, for example, in units of Gy·min or Gy·h . (2) In
Current edition approved by April 9, 2013. Published June 2013. Originally
published as ASTM E 1650–94 with title: Practice for Use of Cellulose Acetate
Dosimetry Systems. ASTM E 1650–94 was adopted by ISO in 1998 with the
intermediate designation ISO 15570:1998(E). The present Third Edition of Inter-
national Standard ISO/ASTM 51650:2013(E) is a major revision of the Second Available from the International Commission on Radiation Units and Measure-
Edition of ISO/ASTM 51650:2005(E). ments, 7910 Woodmont Ave., suite 800, Bethesda, MD 20814, USA.
2 5
The boldface numbers in parentheses refer to the bibliography at the end of this Document produced by Working Group 1 of the Joint Committee for Guides in
standard. Metrology (JCGM/WG 1). Available free of charge at the BIPM website (http://
For referenced ASTM and ISO/ASTM standards, visit the ASTM website, www.bipm.org).
www.astm.org, or contact ASTM Customer Service at service@astm.org. For Document produced by Working Group 2 of the Joint Committee for Guides in
Annual Book of ASTM Standards volume information, refer to the standard’s Metrology (JCGM/WG 2). Available free of charge at the BIPM website (http://
Document Summary page on the ASTM website. www.bipm.org).
©ISO/ASTMInternational2013–Allrightsreserved
ISO/ASTM51650:2013(E)
gamma industrial irradiators, dose rate may be significantly 4.2 CTAdosimetrysystemsarecommonlyusedinindustrial
different at different locations. (3) In electron-beam irradiators radiation processing, for example in the modification of poly-
with pulsed or scanned beam, there are two types of dose rate: mers and sterilization of health care products.
average value over several pulses (scans) and instantaneous 4.3 CTA dosimeter film is particularly useful in absorbed
value within a pulse (scan). These two values can be signifi- dose mapping because it is available in a strip format and if
cantly different. measured using a strip measurement device, it can provide a
3.1.3 calibration curve—expression of the relation between dose map with higher resolution than using discrete points.
indication and corresponding measured quantity value.
5. Overview
(VIM:2008)
3.1.3.1 Discussion—In radiation processing standards, the
5.1 CTA dosimeters are manufactured by casting cellulose
term “dosimeter response” is generally used for “indication”.
triacetate with a plasticizer, triphenylphosphate, and solvents,
3.1.4 cellulose triacetate dosimeter—piece of CTA film for example, a methylene chloride–methanol mixture (5, 11).
that, during exposure to ionizing radiation, exhibits a quanti-
5.2 The commercially available dosimeter film is in the
fiable change in specific net absorbance as a function of format of 8 mm width and 100 m length rolled on a spool,
absorbed dose.
which is described in the informative annex.
5.3 Ionizing radiation induces chemical reactions in CTA
3.1.5 dosimeter—device that, when irradiated, exhibits a
quantifiable change that can be related to absorbed dose in a and the plasticizer, which create or enhance optical absorption
bands in the ultraviolet regions of the spectrum. Optical
given material using appropriate measurement instruments and
procedures. absorbance at appropriate wavelengths within these radiation-
induced absorption bands is quantitatively related to the
3.1.6 dosimeter batch—quantity of dosimeters made from a
absorbed dose. ICRU Report 80 provides information on the
specific mass of material with uniform composition, fabricated
scientific basis and historical development of the CTA dosim-
in a single production run under controlled, consistent condi-
etry systems in current use.
tions, and having a unique identification code.
5.4 The difference between the specific net absorbance of
3.1.7 dosimeter response—reproducible, quantifiable effect
un-irradiated and irradiated CTA dosimeter depends signifi-
produced in the dosimeter by ionizing radiation.
cantly on the analysis wavelength used to make the absorbance
3.1.7.1 Discussion—For CTA dosimeters, the specific net
measurement. Typically, the manufacturer recommends the
absorbance is the dosimeter response.
analysis wavelength that optimizes sensitivity and post-
3.1.8 dosimeter stock—partofadosimeterbatchheldbythe
irradiation stability. The analysis wavelengths recommended
user.
for some commonly used systems are given in Table A1.1.
3.1.9 measurement management system—set of interrelated
or interacting elements necessary to achieve metrological
6. Influence quantities
confirmation and continual control of measurement processes.
6.1 Factors other than absorbed dose which influence the
3.1.10 reference standard dosimetry system—dosimetry
dosimeter response are referred to as influence quantities.
system, generally having the highest metrological quality
These influence quantities include those related to the dosim-
available at a given location or in a given organization, from
eterbefore,during,andafterirradiationandthoserelatedtothe
which measurements made there are derived.
dosimeter response measurements (see ASTM Guide E2701).
3.1.11 response—see dosimeter response.
Influence quantities affecting dosimeter response are discussed
3.1.12 routine dosimetry system—dosimetry system cali-
below.
brated against a reference standard dosimetry system and used
6.2 Pre-Irradiation Conditions:
for routine absorbed dose measurements, including dose map-
6.2.1 Dosimeter Con
...
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