SIST EN IEC 62372:2023

SLOVENSKI STANDARD
01-februar-2023
Jedrska merilna oprema - Scintilatorji v ohišju - Metode preskušanja svetlobnega
toka in intrinzične ločljivosti (IEC 62372:2021)
Nuclear instrumentation - Housed scintillators - Test methods of light output and intrinsic
resolution (IEC 62372:2021)
Strahlungsmessgeräte - Ummantelte Szintillatoren - Prüfverfahren für Lichtabgabe und
intrinsische Auflösung (IEC 62372:2021)
Instrumentation nucléaire - Scintillateurs montés - Méthodes de mesure de la lumière
sortante et de résolution intrinsèque (IEC 62372:2021)
Ta slovenski standard je istoveten z: EN IEC 62372:2022
ICS:
27.120.01 Jedrska energija na splošno Nuclear energy in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62372

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2022
ICS 27.120.01
English Version
Nuclear instrumentation - Housed scintillators - Test methods of
light output and intrinsic resolution
(IEC 62372:2021)
Instrumentation nucléaire - Scintillateurs montés - Strahlungsmessgeräte - Ummantelte Szintillatoren -
Méthodes de mesure de la lumière sortante et de résolution Prüfverfahren für Lichtabgabe und intrinsische Auflösung
intrinsèque (IEC 62372:2021)
(IEC 62372:2021)
This European Standard was approved by CENELEC on 2022-05-24. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
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European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
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CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62372:2022 E
European foreword
This document (EN IEC 62372:2022) consists of the text of IEC 62372:2021 prepared by IEC/SC 45B
“Radiation protection instrumentation” of IEC/TC 45 "Nuclear instrumentation".
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-06-16
implemented at national level by publication of an
identical national standard or by endorsement
latest date by which the national standards (dow) 2025-12-16
•
conflicting with this document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN-CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN and CENELEC
websites.
Endorsement notice
The text of the International Standard IEC 62372:2021 was approved by CEN-CENELEC as a European
Standard without any modification.

IEC 62372 ®
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
Nuclear instrumentation – Housed scintillators – Test methods of light output

and intrinsic resolution
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.120.01 ISBN 978-2-8322-9322-5

– 2 – IEC 62372:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, symbols and abbreviated terms . 5
3.1 Terms and definitions . 5
3.2 Symbols and abbreviated terms . 7
4 Test methods of basic parameters of housed scintillators . 9
4.1 General . 9
4.1.1 Test conditions . 9
4.1.2 The sources of ionizing radiation . 9
4.1.3 The assembly test conditions . 10
4.2 Test methods of nonlinearity and instability of the assembly . 10
4.2.1 Nonlinearity measurement . 10
4.2.2 Instability measurement . 12
4.3 Test methods of the intrinsic resolution, light output of the housed scintillator
and PMT spectrometric constant . 13
4.3.1 Equipment . 13
4.3.2 Measurements . 13
4.3.3 Processing of results . 14
4.4 Test methods of the light output . 15
4.4.1 General . 15
4.4.2 Measurements . 15
4.4.3 Processing of results . 16
4.5 Test methods of the intrinsic resolution . 16
4.5.1 Determination of PMT spectrometric constant . 16
4.5.2 Test method of the intrinsic resolution for housed scintillator . 17
Bibliography . 19

Table 1 – Source of ionizing radiation . 9

IEC 62372:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
NUCLEAR INSTRUMENTATION – HOUSED SCINTILLATORS –
TEST METHODS OF LIGHT OUTPUT AND INTRINSIC RESOLUTION

FOREWORD
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indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62372 has been prepared by IEC technical committee 45: Nuclear
instrumentation.
This second edition cancels and replaces the first edition published in 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• Title has been modified.
• To review the existing requirements and to update the terminology, definitions and
normative references.
– 4 – IEC 62372:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
45/913/FDIS 45/915/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 62372:2021 © IEC 2021 – 5 –
NUCLEAR INSTRUMENTATION – HOUSED SCINTILLATORS –
TEST METHODS OF LIGHT OUTPUT AND INTRINSIC RESOLUTION

1 Scope
This document is applicable to housed scintillators for registration and spectrometry of alpha-,
beta-, gamma-, X-ray and neutron radiation.
The main parameters, such as a light output and intrinsic resolution are established. This
document specifies the requirements for the testing equipment and test methods of the basic
parameters of housed scintillators, such as:
• the direct method is applicable to measure the light output of housed scintillators based on
scintillation material. The housed scintillators certified by this method can be used as
working standard of housed scintillators (hereinafter: working standard) when performing
measurements by a relative method of comparison.
• the relative method of comparison with the working standard is applicable to housed
scintillators based on the same scintillation material as the working standard.
This document does not apply to gas or liquid scintillators and scintillators for counting and
current modes.
The numerical values of the parameters are set to the specific type of scintillators in the
specifications.
2 Normative references
There are no normative references in this document.
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
scintillator
luminescent material, usually liquid or solid, showing radioluminescence with a short afterglow
[SOURCE: IEC 60050-845:1987, 845-04-37]
3.1.2
housed scintillator
scintillator, housed in a container with a reflector and optical window

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3.1.3
scintillation detector
radiation detector consisting of a scintillator that is usually optically coupled to a
photosensitive device, directly or through light guides
Note 1 to entry: The scintillator consists of a scintillating material in which the ionizing particle produces a burst
of luminescence radiation along its path. A common scintillator is NaI(Tl).
[SOURCE: IEC 60050-395:2014, 395-03-01]
3.1.4
assembly
light protective chamber containing a housed scintillator, photomultiplier (PMT), PMT voltage
divider
Note 1 to entry: Assembly is used for testing of the housed scintillator.
3.1.5
light yield
η
ratio of scintillation photons summed energy (E ) to energy (E) lost by ionizing particles in the
p
scintillator
E
p
η=
E
Note 1 to entry: Value of η depends on type and energy of ionizing particle.
3.1.6
light output
C
ratio of total energy (L ) of scintillation photons, which pass through the output window of the
ph
housed scintillator of ionizing radiation, to energy (E), lost by ionizing particles in the
scintillator
L
ph
C=
E
3.1.7
intrinsic resolution of housed scintillator of ionizing radiation
R
d
component, given by housed scintillator of ionizing radiation to energy resolution of the
scintillation detector
Note 1 to entry: The intrinsic resolution R is defined from the relation:
d
2 2
R = R − R ,
d a pm
where
R is the energy resolution of the scintillation detector;
a
R is PMT intrinsic resolution.
pm
3.1.8
total absorption peak
portion of the spectral response curve corresponding to the total absorption of photon energy
in a radiation detector
IEC 62372:2021 © IEC 2021 – 7 –
Note 1 to entry: This peak represents the total absorption of photon energy from all interactive processes,
namely, a) photoelectric absorption, b) Compton effect, and c) pair production.
[SOURCE: IEC 60050-395:2014, 395-03-94]
3.1.9
photomultiplier tube spectrometric constant
A
parameter, characterizing properties of the photomultiplier tube
Note 1 to entry: Defined by the following formula:
2 2
A= (R − R )× C
a d ph
where C is light output, photons/MeV.
ph
3.1.10
working standard
working standard of housed scintillator that is used to check the measuring system and to
measure the light output by a method of comparison
3.1.11
full width at half maximum
FWHM
in a distribution curve comprising a single peak, the distance between the abscissa of two
points on the curve whose ordinates are half of the maximum ordinate of the peak
Note 1 to entry: If the curve considered comprises several peaks, a full width at half maximum exists for each
peak.
3.1.12
expanded uncertainty
expanded uncertainty quantity defining an interval about the result of a measurement that may
be expected to encompass a large fraction of the distribution of values that could reasonably
be attributed to the measurand
Note 1 to entry: The fraction may be viewed as the coverage probability or level of confidence of the interval.
Note 2 to entry: To associate a specific level of confidence with the interval defined by the expanded uncertainty
requires explicit or implicit assumptions regarding the probability distribution characterized by the measurement
result and its combined standard uncertainty. The level of confidence that may be attributed to this interval can be
known only to the extent to which such assumptions may be justified.
[SOURCE: JCGM 100:2008, 2.35]
3.1.13
relative expanded uncertainty
ratio of the expanded uncertainty of a measurement to average value of quantity. It expresses
the relative size of the uncertainty of a measurement (its precision)
3.2 Symbols and abbreviated terms
A the photomultiplier tube spectrometric constant;
a the assembly conversion factor with the housed scintillator;
a the value of conversion response, measured at energy value of E ;
i i
a the maximal value of a;
max
a the minimal value of a;
min
∆a the value of nonlinearity;
C the light output, in relative units;

– 8 – IEC 62372:2021 © IEC 2021
C the light output, photons/MeV;
ph
C the light output of the working standard, photons/MeV;
pho
FWHM the full width at half maximum of peak;
E energy lost by ionizing particle in the scintillator;
E the maximum gamma radiation energy;
max
E summed energy of scintillation photons, which have arisen in scintillator;
p
eps the initial point of housed scintillator conversion response, in energy units;
k the coverage factor;
k the assembly conversion factor;
a
L total energy of scintillation photons;
ph
m coefficient of spectral matching;
n the number of energy values used;
N the average value of conversion factor;
PMT a photomultiplier tube;
Q the PMT photocathode quantum sensitivity;
S(λ) the PMT photocathode spectral characteristic;
R the energy resolution of the scintillation detector;
a
R the energy resolution of scintillation detector with working standard;
ao
R the intrinsic resolution of the measured housed scintillator;
d
R the intrinsic resolution of the working standard;
et
R the PMT intrinsic resolution;
pm
U the expanded uncertainty;
p
u the combined standard uncertainty;
c
V the value of pulse height corresponding to total absorption peak maximum of the
measured housed scintillator;
V the initial point of housed scintillator conversion response;
d
V the value of pulse height corresponding to total absorption peak maximum of the
et
working standard;
V the value of pulse height corresponding to total absorption peak maximum for single
i
measurement;
V pulse height at the input of the assembly, the number of channels;
in
V the value of pulse height which corresponds to E , the number of channels;
max max
V the initial point of assembly conversion response;
o
V the initial
...