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Article: Tungsten mesh as positron transmission moderator in a monoenergetic positron beam

TitleTungsten mesh as positron transmission moderator in a monoenergetic positron beam
Authors
Weng, HMLing, CCBeling, CDFung, SCheung, CKKwan, PYHui, IP
KeywordsPositron annihilation
Positron emission
Positron moderation
Tungsten mesh
Issue Date2004
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nimb
Citation
Nuclear Instruments And Methods In Physics Research, Section B: Beam Interactions With Materials And Atoms, 2004, v. 225 n. 3, p. 397-401 How to Cite?
DOI: http://dx.doi.org/10.1016/j.nimb.2004.05.002
AbstractThe slow positron yield has been measured for various tungsten (W) moderator samples from a 22Na radioactive source. Multi-folded W mesh, W(100) single crystal foil and W polycrystalline foil samples have been investigated. It is found that the fast to slow conversion efficiency of the W mesh moderator depends on: (1) the annealing pretreatments, (2) the chemical etching duration and (3) the number of the folding layers. With the raw W mesh material having a wire diameter of 20 μm and transmission efficiency of 92.5%, an optimal efficiency of 1.2×10-3 was achieved with 5 min etching duration and a folding number of 12 layers. © 2004 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/81055
ISSN
0168-583X
2023 Impact Factor: 1.4
2023 SCImago Journal Rankings: 0.366
ISI Accession Number ID
WOS:000223844500027
References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorWeng, HMen_HK
dc.contributor.authorLing, CCen_HK
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorCheung, CKen_HK
dc.contributor.authorKwan, PYen_HK
dc.contributor.authorHui, IPen_HK
dc.date.accessioned2010-09-06T08:13:15Z-
dc.date.available2010-09-06T08:13:15Z-
dc.date.issued2004en_HK
dc.identifier.citationNuclear Instruments And Methods In Physics Research, Section B: Beam Interactions With Materials And Atoms, 2004, v. 225 n. 3, p. 397-401en_HK
dc.identifier.issn0168-583Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/81055-
dc.description.abstractThe slow positron yield has been measured for various tungsten (W) moderator samples from a 22Na radioactive source. Multi-folded W mesh, W(100) single crystal foil and W polycrystalline foil samples have been investigated. It is found that the fast to slow conversion efficiency of the W mesh moderator depends on: (1) the annealing pretreatments, (2) the chemical etching duration and (3) the number of the folding layers. With the raw W mesh material having a wire diameter of 20 μm and transmission efficiency of 92.5%, an optimal efficiency of 1.2×10-3 was achieved with 5 min etching duration and a folding number of 12 layers. © 2004 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/nimben_HK
dc.relation.ispartofNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atomsen_HK
dc.rightsNuclear Instruments & Methods in Physics Research Section B Beam Interactions with Materials and Atoms. Copyright © Elsevier BV.en_HK
dc.subjectPositron annihilationen_HK
dc.subjectPositron emissionen_HK
dc.subjectPositron moderationen_HK
dc.subjectTungsten meshen_HK
dc.titleTungsten mesh as positron transmission moderator in a monoenergetic positron beamen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0168-9002&volume=225&spage=397&epage=401&date=2004&atitle=Tungsten+mesh+as+positron+transmission+moderator+in+a+monoenergetic+positron+beamen_HK
dc.identifier.emailLing, CC: ccling@hkucc.hku.hken_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityLing, CC=rp00747en_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.nimb.2004.05.002en_HK
dc.identifier.scopuseid_2-s2.0-4344583520en_HK
dc.identifier.hkuros91992en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4344583520&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume225en_HK
dc.identifier.issue3en_HK
dc.identifier.spage397en_HK
dc.identifier.epage401en_HK
dc.identifier.isiWOS:000223844500027-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridWeng, HM=7102468725en_HK
dc.identifier.scopusauthoridLing, CC=13310239300en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridCheung, CK=10044144900en_HK
dc.identifier.scopusauthoridKwan, PY=12243875000en_HK
dc.identifier.scopusauthoridHui, IP=7004838789en_HK
dc.identifier.issnl0168-583X-

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