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Article: Deconvolution of Doppler-broadened positron annihilation lineshapes by the generalised least-squares method
Title | Deconvolution of Doppler-broadened positron annihilation lineshapes by the generalised least-squares method |
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Authors | |
Issue Date | 1995 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc |
Citation | Applied Surface Science, 1995, v. 85 C, p. 182-186 How to Cite? |
Abstract | Deconvolution of the Doppler-broadened annihilation radiation lineshape has been carried out using the generalised least-squares method. The nondashlinear background subtraction is examined through tail stripping and step function fitting procedures. Spurious oscillations of the residual instrumental function are found not to produce an efficient inverse transformation. For this reason least-squares solutions are subjected to a nondashnegativity constraint in order to reduce the oscillations in the deconvoluted spectrum. This procedure improves the results dramatically and shows promise as regards quantitative studies of the local momentum distributions and defect characterisation at various depths of solids in future positron beam experiments. © 1995. |
Persistent Identifier | http://hdl.handle.net/10722/174722 |
ISSN | 2023 Impact Factor: 6.3 2023 SCImago Journal Rankings: 1.210 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Panda, BK | en_HK |
dc.contributor.author | Fleischer, S | en_HK |
dc.contributor.author | Ling, CC | en_HK |
dc.contributor.author | Beling, CD | en_HK |
dc.contributor.author | Fung, S | en_HK |
dc.contributor.author | Panda, S | en_HK |
dc.date.accessioned | 2012-11-26T08:47:04Z | - |
dc.date.available | 2012-11-26T08:47:04Z | - |
dc.date.issued | 1995 | en_HK |
dc.identifier.citation | Applied Surface Science, 1995, v. 85 C, p. 182-186 | en_HK |
dc.identifier.issn | 0169-4332 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/174722 | - |
dc.description.abstract | Deconvolution of the Doppler-broadened annihilation radiation lineshape has been carried out using the generalised least-squares method. The nondashlinear background subtraction is examined through tail stripping and step function fitting procedures. Spurious oscillations of the residual instrumental function are found not to produce an efficient inverse transformation. For this reason least-squares solutions are subjected to a nondashnegativity constraint in order to reduce the oscillations in the deconvoluted spectrum. This procedure improves the results dramatically and shows promise as regards quantitative studies of the local momentum distributions and defect characterisation at various depths of solids in future positron beam experiments. © 1995. | en_HK |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/apsusc | en_HK |
dc.relation.ispartof | Applied Surface Science | en_HK |
dc.rights | Applied Surface Science. Copyright © Elsevier BV. | - |
dc.title | Deconvolution of Doppler-broadened positron annihilation lineshapes by the generalised least-squares method | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Ling, CC: ccling@hkucc.hku.hk | en_HK |
dc.identifier.email | Beling, CD: cdbeling@hkucc.hku.hk | en_HK |
dc.identifier.email | Fung, S: sfung@hku.hk | en_HK |
dc.identifier.authority | Ling, CC=rp00747 | en_HK |
dc.identifier.authority | Beling, CD=rp00660 | en_HK |
dc.identifier.authority | Fung, S=rp00695 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/0169-4332(94)00330-0 | - |
dc.identifier.scopus | eid_2-s2.0-0029632284 | en_HK |
dc.identifier.hkuros | 3321 | - |
dc.identifier.volume | 85 | en_HK |
dc.identifier.issue | C | en_HK |
dc.identifier.spage | 182 | en_HK |
dc.identifier.epage | 186 | en_HK |
dc.identifier.isi | WOS:A1995QD95000033 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Panda, BK=22963418500 | en_HK |
dc.identifier.scopusauthorid | Fleischer, S=7103394445 | en_HK |
dc.identifier.scopusauthorid | Ling, CC=13310239300 | en_HK |
dc.identifier.scopusauthorid | Beling, CD=7005864180 | en_HK |
dc.identifier.scopusauthorid | Fung, S=7201970040 | en_HK |
dc.identifier.scopusauthorid | Panda, S=55419719000 | en_HK |
dc.identifier.issnl | 0169-4332 | - |