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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
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?
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
2015 Impact Factor: 1.389
2015 SCImago Journal Rankings: 0.707
ISI Accession Number ID
References

 

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

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