Designs and neutronic characteristics of an epithermal neutron moderator at ambient temperature for neutron time-of-flight measurements
Compact time-of-flight (TOF) measurement systems are desirable for easy installation in various facilities. To achieve such compact systems, one of the key considerations is the design of the neutron moderator. Therefore, systematic studies on moderators considering both neutron energy resolution an...
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Veröffentlicht in: | Journal of nuclear science and technology 2022-12, Vol.59 (12), p.1546-1557 |
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creator | Lee, Jaehong Ito, Fumiaki Hironaka, Kota Takahashi, Tone Suzuki, Satoshi Koizumi, Mitsuo |
description | Compact time-of-flight (TOF) measurement systems are desirable for easy installation in various facilities. To achieve such compact systems, one of the key considerations is the design of the neutron moderator. Therefore, systematic studies on moderators considering both neutron energy resolution and neutron intensity are important. In this paper, to design an epithermal neutron moderator at ambient temperature for short-distance TOF measurements, the neutron intensity and energy resolution of epithermal neutrons have been studied using the Monte Carlo simulation code PHITS with JENDL-4.0 for various types of moderators. The neutronic characteristics of a moderator comprising several components were evaluated. The relationships between the moderator dimensions and both the energy resolution and intensity of the epithermal neutrons were determined. From the obtained results, the appropriate high-resolution moderator designs for the short-distance TOF measurements were proposed. |
doi_str_mv | 10.1080/00223131.2022.2077259 |
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To achieve such compact systems, one of the key considerations is the design of the neutron moderator. Therefore, systematic studies on moderators considering both neutron energy resolution and neutron intensity are important. In this paper, to design an epithermal neutron moderator at ambient temperature for short-distance TOF measurements, the neutron intensity and energy resolution of epithermal neutrons have been studied using the Monte Carlo simulation code PHITS with JENDL-4.0 for various types of moderators. The neutronic characteristics of a moderator comprising several components were evaluated. The relationships between the moderator dimensions and both the energy resolution and intensity of the epithermal neutrons were determined. From the obtained results, the appropriate high-resolution moderator designs for the short-distance TOF measurements were proposed.</description><identifier>ISSN: 0022-3131</identifier><identifier>EISSN: 1881-1248</identifier><identifier>DOI: 10.1080/00223131.2022.2077259</identifier><language>eng</language><publisher>Tokyo: Taylor & Francis</publisher><subject>Ambient temperature ; Energy resolution ; epithermal neutron moderator ; Fast neutrons ; Moderators ; Monte Carlo simulation ; neutron intensity ; Neutrons ; Time measurement ; time-of-flight (TOF)</subject><ispartof>Journal of nuclear science and technology, 2022-12, Vol.59 (12), p.1546-1557</ispartof><rights>2022 Japan Atomic Energy Agency. Published by Informa UK Limited, trading as Taylor & Francis Group. 2022</rights><rights>2022 Japan Atomic Energy Agency. Published by Informa UK Limited, trading as Taylor & Francis Group. This work is licensed under the Creative Commons Attribution – Non-Commercial – No Derivatives License http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). 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To achieve such compact systems, one of the key considerations is the design of the neutron moderator. Therefore, systematic studies on moderators considering both neutron energy resolution and neutron intensity are important. In this paper, to design an epithermal neutron moderator at ambient temperature for short-distance TOF measurements, the neutron intensity and energy resolution of epithermal neutrons have been studied using the Monte Carlo simulation code PHITS with JENDL-4.0 for various types of moderators. The neutronic characteristics of a moderator comprising several components were evaluated. The relationships between the moderator dimensions and both the energy resolution and intensity of the epithermal neutrons were determined. From the obtained results, the appropriate high-resolution moderator designs for the short-distance TOF measurements were proposed.</description><subject>Ambient temperature</subject><subject>Energy resolution</subject><subject>epithermal neutron moderator</subject><subject>Fast neutrons</subject><subject>Moderators</subject><subject>Monte Carlo simulation</subject><subject>neutron intensity</subject><subject>Neutrons</subject><subject>Time measurement</subject><subject>time-of-flight (TOF)</subject><issn>0022-3131</issn><issn>1881-1248</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>0YH</sourceid><recordid>eNp9kM9OwzAMxiMEEmPwCEiROHc0adOmN9D4K03iAucoS50tU9OUJBXaE_DapNp25RLH9u-z5Q-hW5IvSM7z-zyntCAFWdD0SU9dU9acoRnhnGSElvwczSYmm6BLdBXCLqVVWfEZ-n2CYDZ9wLJvcQ9j9K43Cqut9FJF8CZEowJ2OgEYBhO34K3sTii2rgUvo_NYRizt2kAfcQQ7TNXRA9apdYKjsZA5nenObLYRW5AhITZJwjW60LILcHOMc_T18vy5fMtWH6_vy8dVpgrOYkZLwlumFaGgOdMl542uCEhVrFWVE6JUW7WUAVVNzdt1JTWja8ZKpSoooabFHN0d5g7efY8Qoti50fdppaB1UTeM8aZJFDtQyrsQPGgxeGOl3wuSi8lzcfJcTJ6Lo-dJ93DQmT7dbeWP810rotx3zmsve2WCKP4f8Qe_jow1</recordid><startdate>20221202</startdate><enddate>20221202</enddate><creator>Lee, Jaehong</creator><creator>Ito, Fumiaki</creator><creator>Hironaka, Kota</creator><creator>Takahashi, Tone</creator><creator>Suzuki, Satoshi</creator><creator>Koizumi, Mitsuo</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><scope>0YH</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20221202</creationdate><title>Designs and neutronic characteristics of an epithermal neutron moderator at ambient temperature for neutron time-of-flight measurements</title><author>Lee, Jaehong ; Ito, Fumiaki ; Hironaka, Kota ; Takahashi, Tone ; Suzuki, Satoshi ; Koizumi, Mitsuo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-2418d5fc12ef85f4889f61eac3bc6011ccd6d25e2c978db6af52b554cc6e4e723</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Ambient temperature</topic><topic>Energy resolution</topic><topic>epithermal neutron moderator</topic><topic>Fast neutrons</topic><topic>Moderators</topic><topic>Monte Carlo simulation</topic><topic>neutron intensity</topic><topic>Neutrons</topic><topic>Time measurement</topic><topic>time-of-flight (TOF)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Jaehong</creatorcontrib><creatorcontrib>Ito, Fumiaki</creatorcontrib><creatorcontrib>Hironaka, Kota</creatorcontrib><creatorcontrib>Takahashi, Tone</creatorcontrib><creatorcontrib>Suzuki, Satoshi</creatorcontrib><creatorcontrib>Koizumi, Mitsuo</creatorcontrib><collection>Access via Taylor & Francis (Open Access Collection)</collection><collection>CrossRef</collection><jtitle>Journal of nuclear science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lee, Jaehong</au><au>Ito, Fumiaki</au><au>Hironaka, Kota</au><au>Takahashi, Tone</au><au>Suzuki, Satoshi</au><au>Koizumi, Mitsuo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Designs and neutronic characteristics of an epithermal neutron moderator at ambient temperature for neutron time-of-flight measurements</atitle><jtitle>Journal of nuclear science and technology</jtitle><date>2022-12-02</date><risdate>2022</risdate><volume>59</volume><issue>12</issue><spage>1546</spage><epage>1557</epage><pages>1546-1557</pages><issn>0022-3131</issn><eissn>1881-1248</eissn><abstract>Compact time-of-flight (TOF) measurement systems are desirable for easy installation in various facilities. To achieve such compact systems, one of the key considerations is the design of the neutron moderator. Therefore, systematic studies on moderators considering both neutron energy resolution and neutron intensity are important. In this paper, to design an epithermal neutron moderator at ambient temperature for short-distance TOF measurements, the neutron intensity and energy resolution of epithermal neutrons have been studied using the Monte Carlo simulation code PHITS with JENDL-4.0 for various types of moderators. The neutronic characteristics of a moderator comprising several components were evaluated. The relationships between the moderator dimensions and both the energy resolution and intensity of the epithermal neutrons were determined. From the obtained results, the appropriate high-resolution moderator designs for the short-distance TOF measurements were proposed.</abstract><cop>Tokyo</cop><pub>Taylor & Francis</pub><doi>10.1080/00223131.2022.2077259</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Ambient temperature Energy resolution epithermal neutron moderator Fast neutrons Moderators Monte Carlo simulation neutron intensity Neutrons Time measurement time-of-flight (TOF) |
title | Designs and neutronic characteristics of an epithermal neutron moderator at ambient temperature for neutron time-of-flight measurements |
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