{"id":165592,"date":"2024-10-19T10:02:57","date_gmt":"2024-10-19T10:02:57","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-e523-2016\/"},"modified":"2024-10-25T02:22:21","modified_gmt":"2024-10-25T02:22:21","slug":"astm-e523-2016","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-e523-2016\/","title":{"rendered":"ASTM-E523 2016"},"content":{"rendered":"

ASTM E523-16<\/h3>\n

Historical Standard: Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper<\/h4>\n
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ASTM E523<\/h4>\n

Scope<\/strong><\/p>\n

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1.1<\/span> This test method covers procedures for measuring reaction rates by the activation reaction 63<\/sup>Cu(n,\u03b1) 60<\/sup>Co. The cross section for 60<\/sup>Co produced in this reaction increases rapidly with neutrons having energies greater than about 4.5 MeV. 60<\/sup>Co decays with a half-life of 1925.27 days (\u00b10.29 days)(1<\/span>)<\/span>2<\/span><\/span> and emits two gamma rays having energies of 1.1732278 and 1.332492 MeV(1<\/span>)<\/span>. The isotopic content of natural copper is 69.17\u2009% 63<\/sup>Cu and 30.83 % 65<\/sup>Cu(2<\/span>)<\/span>. The neutron reaction, 63<\/sup>Cu(n,\u03b3)64<\/sup>Cu, produces a radioactive product that emits gamma rays (1.34577 MeV (E1005<\/span>)) which might interfere with the counting of the 60<\/sup>Co gamma rays.<\/p>\n<\/p><\/div>\n

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1.2<\/span> With suitable techniques, fission-neutron fluence rates above 109<\/sup> cm\u22122<\/sup>\u00b7s\u22121<\/sup> can be determined. The 63<\/sup>Cu(n,\u03b1)60<\/sup>Co reaction can be used to determine fast-neutron fluences for irradiation times up to about 15 years, provided that the analysis methods described in Practice E261<\/span> are followed. If dosimeters are analyzed after irradiation periods longer than 15 years, the information inferred about the fluence during irradiation periods more than 15 years before the end of the irradiation should not be relied upon without supporting data from dosimeters withdrawn earlier.<\/p>\n<\/p><\/div>\n

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1.3<\/span> Detailed procedures for other fast-neutron detectors are referenced in Practice E261<\/span>.<\/p>\n<\/p><\/div>\n

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1.4<\/span> 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.<\/i><\/p>\n<\/p><\/div>\n

Keywords<\/strong><\/p>\n

activation; activation reaction; copper; cross section; dosimetry; fast-neutron monitor; neutron metrology; pressure vessel surveillance; reaction rate; 63<\/sup>Cu(n,\u03b1)60<\/sup>Co;<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 17.240 (Radiation measurements)<\/p>\n

DOI:<\/strong> 10.1520\/E0523-16<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

E523-16 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Copper<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2016<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":165598,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2637],"product_tag":[],"class_list":{"0":"post-165592","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-astm","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\/165592","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\/165598"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=165592"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=165592"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=165592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}