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Article: Luminescence isochron dating: A new approach using different grain sizes

TitleLuminescence isochron dating: A new approach using different grain sizes
Authors
Issue Date2002
PublisherOxford University Press. The Journal's web site is located at http://rpd.oxfordjournals.org/
Citation
Radiation Protection Dosimetry, 2002, v. 101 n. 1-4, p. 333-338 How to Cite?
AbstractA new approach to isochron dating is described using different sizes of quartz and K-feldspar grains. The technique can be applied to sites with time-dependent external dose rates. It is assumed that any underestimation of the equivalent dose (De) using K-feldspar is by a factor F, which is independent of grain size (90-350 μm) for a given sample. Calibration of the beta source for different grain sizes is discussed, and then the sample ages are calculated using the differences between quartz and K-feldspar Dc from grains of similar size. Two aeolian sediment samples from north-eastern China are used to illustrate the application of the new method. It is confirmed that the observed values of De derived using K-feldspar underestimate the expected doses (based on the quartz De) but, nevertheless, these K-feldspar De values correlate linearly with the calculated internal dose rate contribution, Supporting the assumption that the underestimation factor F is independent of grain size. The isochron ages are also compared with the results obtained using quartz De and the measured external dose rates.
Persistent Identifierhttp://hdl.handle.net/10722/72909
ISSN
2015 Impact Factor: 0.894
2015 SCImago Journal Rankings: 0.456
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhao, Hen_HK
dc.contributor.authorLi, SHen_HK
dc.date.accessioned2010-09-06T06:46:15Z-
dc.date.available2010-09-06T06:46:15Z-
dc.date.issued2002en_HK
dc.identifier.citationRadiation Protection Dosimetry, 2002, v. 101 n. 1-4, p. 333-338en_HK
dc.identifier.issn0144-8420en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72909-
dc.description.abstractA new approach to isochron dating is described using different sizes of quartz and K-feldspar grains. The technique can be applied to sites with time-dependent external dose rates. It is assumed that any underestimation of the equivalent dose (De) using K-feldspar is by a factor F, which is independent of grain size (90-350 μm) for a given sample. Calibration of the beta source for different grain sizes is discussed, and then the sample ages are calculated using the differences between quartz and K-feldspar Dc from grains of similar size. Two aeolian sediment samples from north-eastern China are used to illustrate the application of the new method. It is confirmed that the observed values of De derived using K-feldspar underestimate the expected doses (based on the quartz De) but, nevertheless, these K-feldspar De values correlate linearly with the calculated internal dose rate contribution, Supporting the assumption that the underestimation factor F is independent of grain size. The isochron ages are also compared with the results obtained using quartz De and the measured external dose rates.en_HK
dc.languageengen_HK
dc.publisherOxford University Press. The Journal's web site is located at http://rpd.oxfordjournals.org/en_HK
dc.relation.ispartofRadiation Protection Dosimetryen_HK
dc.rightsRadiation Protection Dosimetry. Copyright © Oxford University Press.en_HK
dc.subject.meshAlpha Particlesen_HK
dc.subject.meshAluminum Silicates - chemistryen_HK
dc.subject.meshBeta Particlesen_HK
dc.subject.meshCalibrationen_HK
dc.subject.meshPotassium Compounds - chemistryen_HK
dc.subject.meshQuartz - chemistryen_HK
dc.subject.meshRadioisotopes - analysisen_HK
dc.subject.meshReproducibility of Resultsen_HK
dc.subject.meshThermoluminescent Dosimetry - methodsen_HK
dc.titleLuminescence isochron dating: A new approach using different grain sizesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0144-8420&volume=101&spage=333&epage=338&date=2002&atitle=Luminescence+isochron+dating:+a+new+approach+using+different+grain+sizesen_HK
dc.identifier.emailLi, SH:shli@hku.hken_HK
dc.identifier.authorityLi, SH=rp00740en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid12382762-
dc.identifier.scopuseid_2-s2.0-0036387982en_HK
dc.identifier.hkuros82140en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036387982&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume101en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage333en_HK
dc.identifier.epage338en_HK
dc.identifier.isiWOS:000178899900064-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhao, H=7404778046en_HK
dc.identifier.scopusauthoridLi, SH=24438103700en_HK

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