File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Preliminary studies on a variable energy positron annihilation lifetime spectroscopy system

TitlePreliminary studies on a variable energy positron annihilation lifetime spectroscopy system
Authors
KeywordsLifetime spectroscopy
Secondary electrons
Timing
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc
Citation
Applied Surface Science, 2006, v. 252 n. 9, p. 3138-3142 How to Cite?
AbstractThere are many advantages in being able to perform positron annihilation lifetime spectroscopy (PALS) using a variable energy positron beam, the most obvious being the easy identification of different defect types at different depths. The difficulty in conducting variable energy (VE) PALS studies lies in the fact that a "start" signal is required to signal the entry of the positron into the target. Two methods have been used to overcome this problem, namely the bunching technique, which employs radio frequency (RF) cavities and choppers, and secondly the use of secondary electrons emitted from the target. The latter technique is in terms of experimental complexity much simpler, but has in the past suffered from poor time resolution (typically ∼500 ps). In this work, we present a series of computer simulations of a design based on the secondary electron emission from thin C-foils in transmission mode which shows that significant improvements in time resolution can be made with resolutions ∼200 ps being in principle possible. © 2005 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/80526
ISSN
2015 Impact Factor: 3.15
2015 SCImago Journal Rankings: 0.930
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKwan, PYen_HK
dc.contributor.authorCheung, CKen_HK
dc.contributor.authorBeling, CDen_HK
dc.contributor.authorFung, Sen_HK
dc.date.accessioned2010-09-06T08:07:25Z-
dc.date.available2010-09-06T08:07:25Z-
dc.date.issued2006en_HK
dc.identifier.citationApplied Surface Science, 2006, v. 252 n. 9, p. 3138-3142en_HK
dc.identifier.issn0169-4332en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80526-
dc.description.abstractThere are many advantages in being able to perform positron annihilation lifetime spectroscopy (PALS) using a variable energy positron beam, the most obvious being the easy identification of different defect types at different depths. The difficulty in conducting variable energy (VE) PALS studies lies in the fact that a "start" signal is required to signal the entry of the positron into the target. Two methods have been used to overcome this problem, namely the bunching technique, which employs radio frequency (RF) cavities and choppers, and secondly the use of secondary electrons emitted from the target. The latter technique is in terms of experimental complexity much simpler, but has in the past suffered from poor time resolution (typically ∼500 ps). In this work, we present a series of computer simulations of a design based on the secondary electron emission from thin C-foils in transmission mode which shows that significant improvements in time resolution can be made with resolutions ∼200 ps being in principle possible. © 2005 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/apsuscen_HK
dc.relation.ispartofApplied Surface Scienceen_HK
dc.rightsApplied Surface Science. Copyright © Elsevier BV.en_HK
dc.subjectLifetime spectroscopyen_HK
dc.subjectSecondary electronsen_HK
dc.subjectTimingen_HK
dc.titlePreliminary studies on a variable energy positron annihilation lifetime spectroscopy systemen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0169-4332&volume=252&spage=3138&epage=3142&date=2006&atitle=Preliminary+studies+on+a+variable+energy+positron+annihilation+lifetime+spectroscopy+systemen_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.apsusc.2005.08.053en_HK
dc.identifier.scopuseid_2-s2.0-32644445640en_HK
dc.identifier.hkuros115970en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-32644445640&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume252en_HK
dc.identifier.issue9en_HK
dc.identifier.spage3138en_HK
dc.identifier.epage3142en_HK
dc.identifier.isiWOS:000236021300009-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridKwan, PY=12243875000en_HK
dc.identifier.scopusauthoridCheung, CK=10044144900en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats