This document specifies the neutron reference radiation fields, in the energy range from thermal up to 20 MeV, for calibrating neutron-measuring devices used for radiation protection purposes and for determining their response as a function of neutron energy.<\/p>\n
This document is concerned only with the methods of producing and characterizing the neutron reference radiation fields. The procedures for applying these radiation fields for calibrations are described in References [1<\/span>] and [2<\/span>].<\/p>\n The neutron reference radiation fields specified are the following:<\/p>\n neutron fields from radionuclide sources, including neutron fields from sources in a moderator;<\/p>\n<\/li>\n neutron fields produced by nuclear reactions with charged particles from accelerators;<\/p>\n<\/li>\n neutron fields from reactors.<\/p>\n<\/li>\n<\/ul>\n In view of the methods of production and use of them, these neutron reference radiation fields are divided, for the purposes of this document, into the following three separate clauses:<\/p>\n In Clause 4<\/span>, radionuclide neutron sources with wide spectra are specified for the calibration of neutron-measuring devices. These sources should be used by laboratories engaged in the routine calibration of neutron-measuring devices, the particular design of which has already been type tested.<\/p>\n<\/li>\n In Clause 5<\/span>, accelerator-produced monoenergetic neutrons and reactor-produced neutrons with wide or quasi monoenergetic spectra are specified for determining the response of neutron?measuring devices as a function of neutron energy. Since these neutron reference radiation fields are produced at specialized and well-equipped laboratories, only the minimum of experimental detail is given.<\/p>\n<\/li>\n In Clause 6<\/span>, thermal neutron fields are specified. These fields can be produced by moderated radionuclide sources, accelerators, or reactors.<\/p>\n<\/li>\n<\/ul>\n Neutron reference radiations fields – Characteristics and methods of production<\/b><\/p>\n\n
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PDF Catalog<\/h4>\n
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\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 2<\/td>\n National foreword <\/td>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n Introduction <\/td>\n<\/tr>\n \n 9<\/td>\n 1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n\n 11<\/td>\n 4 Broad spectrum neutron reference radiation fields produced with radionuclide sources
4.1 Overview
4.2 Types of calibration sources <\/td>\n<\/tr>\n\n 12<\/td>\n 4.3 Source shape and encapsulation
4.4 Photon component of the neutron field <\/td>\n<\/tr>\n\n 13<\/td>\n 4.5 Energy distribution of neutron source emission rate
4.6 Neutron fluence rate produced by a source <\/td>\n<\/tr>\n\n 14<\/td>\n 4.7 Determination of the neutron source emission rate
4.8 Irradiation facility <\/td>\n<\/tr>\n\n 15<\/td>\n 5 Reference fields for the determination of the response of neutron\u2011measuring devices as a function of neutron energy
5.1 Overview
5.2 General properties <\/td>\n<\/tr>\n\n 16<\/td>\n 5.3 Neutron reference radiation fields produced with particle accelerators
5.3.1 General requirements
5.3.2 Energy of charged particles <\/td>\n<\/tr>\n\n 17<\/td>\n 5.3.3 Neutron spectrum
5.3.4 Parasitic and scattered neutron background
5.3.5 Neutron fluence measurement and monitoring <\/td>\n<\/tr>\n\n 18<\/td>\n 5.4 Neutron reference radiation fields produced with reactors
5.4.1 General requirements
5.4.2 Production and monitoring
6 Thermal neutron reference radiation fields <\/td>\n<\/tr>\n\n 20<\/td>\n Annex A (informative) Tabular and graphical representation of the neutron spectra for radionuclide sources <\/td>\n<\/tr>\n \n 22<\/td>\n Annex B (normative) Energy distribution of the neutron emission rate for the 252Cf source <\/td>\n<\/tr>\n \n 24<\/td>\n Annex C (informative) Characteristics of D2O-moderated 252Cf sources <\/td>\n<\/tr>\n \n 28<\/td>\n Annex D (informative) Characteristics of 241Am-Be sources <\/td>\n<\/tr>\n \n 32<\/td>\n Annex E (informative) Angular source emission rate characteristics of radionuclide neutron sources <\/td>\n<\/tr>\n \n 35<\/td>\n Annex F (normative) Conventional thermal-neutron fluence rate <\/td>\n<\/tr>\n \n 36<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2021<\/td>\n 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":389625,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-389616","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/389616","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/389625"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=389616"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=389616"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=389616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}