ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE
Identifieur interne : 000042 ( Main/Exploration ); précédent : 000041; suivant : 000043ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE
Auteurs : Alan G. Hogg [Nouvelle-Zélande] ; L. Keith Fifield [Australie] ; Jonathan G. Palmer [Nouvelle-Zélande] ; Chris S. M. Turney [Australie] ; Rex Galbraith [Royaume-Uni]Source :
- Radiocarbon [ 0033-8222 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Pollution.
English descriptors
- KwdEn :
Abstract
Although high-sensitivity liquid scintillation (LS) spectroscopy is theoretically capable of producing finite radiocarbon ages in the 50,000- to 70,000-yr range, there is little evidence in the literature that meaningful dates in this time period have been obtained. The pressing need to undertake calibration beyond 26 kyr has resulted in the regular publication of 14C results in excess of 50 kyr, yet very little effort has been made to demonstrate their accuracy or precision. There is a paucity of systematic studies of the techniques required to produce reliable dates close to background and the methods needed to assess contamination from either in situ sources or laboratory handling and processing. We have studied the requirements for producing accurate and reliable dates beyond 50 kyr. Laboratory procedures include optimization of LS spectrometers to obtain low and stable non-14C background count rates, use of low-background counting vials, large benzene volumes, long counting times, and preconditioning of vacuum lines. We also discuss the need for multiple analyses of a suitable material containing no original 14C (background blank) and the application of an appropriate statistical model to compensate for variability in background contamination beyond counting statistics. Accurate and reproducible finite ages >60 kyr are indeed possible by high-sensitivity LS spectroscopy, but require corroborating background blank data to be defensible.
Affiliations:
- Australie, Nouvelle-Zélande, Royaume-Uni
- Angleterre, Grand Londres
- Londres
- University College de Londres
Links toward previous steps (curation, corpus...)
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE</title><author><name sortKey="Hogg, Alan G" sort="Hogg, Alan G" uniqKey="Hogg A" first="Alan G." last="Hogg">Alan G. Hogg</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Radiocarbon Laboratory, University of Waikato, Private Bag</s1><s2>Hamilton</s2><s3>NZL</s3><sZ>1 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Hamilton</wicri:noRegion></affiliation></author><author><name sortKey="Fifield, L Keith" sort="Fifield, L Keith" uniqKey="Fifield L" first="L. Keith" last="Fifield">L. Keith Fifield</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University</s1><s2>Canberra ACT 0200</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Canberra ACT 0200</wicri:noRegion></affiliation></author><author><name sortKey="Palmer, Jonathan G" sort="Palmer, Jonathan G" uniqKey="Palmer J" first="Jonathan G." last="Palmer">Jonathan G. Palmer</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Gondwana Tree Ring Laboratory, P.O. Box 64</s1><s2>Tai Tapu, Canterbury 8150</s2><s3>NZL</s3><sZ>3 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Tai Tapu, Canterbury 8150</wicri:noRegion></affiliation></author><author><name sortKey="Turney, Chris S M" sort="Turney, Chris S M" uniqKey="Turney C" first="Chris S. M." last="Turney">Chris S. M. Turney</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>GeoQuEST Research Centre, School of Earth and Environmental Sciences, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Galbraith, Rex" sort="Galbraith, Rex" uniqKey="Galbraith R" first="Rex" last="Galbraith">Rex Galbraith</name><affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Department of Statistical Science, University College London, Gower Street</s1><s2>London WC1E 6BT</s2><s3>GBR</s3><sZ>5 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London WC1E 6BT</wicri:noRegion><orgName type="university">University College de Londres</orgName><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">08-0357964</idno><date when="2007">2007</date><idno type="stanalyst">FRANCIS 08-0357964 INIST</idno><idno type="RBID">Francis:08-0357964</idno><idno type="wicri:Area/Main/Corpus">000054</idno><idno type="wicri:Area/Main/Curation">000054</idno><idno type="wicri:Area/Main/Exploration">000042</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Exploration">000042</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE</title><author><name sortKey="Hogg, Alan G" sort="Hogg, Alan G" uniqKey="Hogg A" first="Alan G." last="Hogg">Alan G. Hogg</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Radiocarbon Laboratory, University of Waikato, Private Bag</s1><s2>Hamilton</s2><s3>NZL</s3><sZ>1 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Hamilton</wicri:noRegion></affiliation></author><author><name sortKey="Fifield, L Keith" sort="Fifield, L Keith" uniqKey="Fifield L" first="L. Keith" last="Fifield">L. Keith Fifield</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University</s1><s2>Canberra ACT 0200</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Canberra ACT 0200</wicri:noRegion></affiliation></author><author><name sortKey="Palmer, Jonathan G" sort="Palmer, Jonathan G" uniqKey="Palmer J" first="Jonathan G." last="Palmer">Jonathan G. Palmer</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Gondwana Tree Ring Laboratory, P.O. Box 64</s1><s2>Tai Tapu, Canterbury 8150</s2><s3>NZL</s3><sZ>3 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Tai Tapu, Canterbury 8150</wicri:noRegion></affiliation></author><author><name sortKey="Turney, Chris S M" sort="Turney, Chris S M" uniqKey="Turney C" first="Chris S. M." last="Turney">Chris S. M. Turney</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>GeoQuEST Research Centre, School of Earth and Environmental Sciences, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="Galbraith, Rex" sort="Galbraith, Rex" uniqKey="Galbraith R" first="Rex" last="Galbraith">Rex Galbraith</name><affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Department of Statistical Science, University College London, Gower Street</s1><s2>London WC1E 6BT</s2><s3>GBR</s3><sZ>5 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London WC1E 6BT</wicri:noRegion><orgName type="university">University College de Londres</orgName><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Radiocarbon</title><title level="j" type="abbreviated">Radiocarbon</title><idno type="ISSN">0033-8222</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Radiocarbon</title><title level="j" type="abbreviated">Radiocarbon</title><idno type="ISSN">0033-8222</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Calibration</term><term>Dating</term><term>Method</term><term>Pollution</term><term>Radiocarbon</term><term>Sample</term><term>Wood</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Radiocarbone</term><term>Datation</term><term>Bois</term><term>Echantillon</term><term>Méthode</term><term>Calibration</term><term>Spectroscopie à scintillation liquide</term><term>Pollution</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Pollution</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Although high-sensitivity liquid scintillation (LS) spectroscopy is theoretically capable of producing finite radiocarbon ages in the 50,000- to 70,000-yr range, there is little evidence in the literature that meaningful dates in this time period have been obtained. The pressing need to undertake calibration beyond 26 kyr has resulted in the regular publication of <sup>14</sup>C results in excess of 50 kyr, yet very little effort has been made to demonstrate their accuracy or precision. There is a paucity of systematic studies of the techniques required to produce reliable dates close to background and the methods needed to assess contamination from either in situ sources or laboratory handling and processing. We have studied the requirements for producing accurate and reliable dates beyond 50 kyr. Laboratory procedures include optimization of LS spectrometers to obtain low and stable non-<sup>14</sup>C background count rates, use of low-background counting vials, large benzene volumes, long counting times, and preconditioning of vacuum lines. We also discuss the need for multiple analyses of a suitable material containing no original <sup>14</sup>C (background blank) and the application of an appropriate statistical model to compensate for variability in background contamination beyond counting statistics. Accurate and reproducible finite ages >60 kyr are indeed possible by high-sensitivity LS spectroscopy, but require corroborating background blank data to be defensible.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0033-8222</s0></fA01><fA03 i2="1"><s0>Radiocarbon</s0></fA03><fA05><s2>49</s2></fA05><fA06><s2>2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE</s1></fA08><fA09 i1="01" i2="1" l="ENG"><s1>19th International Radiocarbon Conference, Keble College, Oxford, England. 3-7 April 2006</s1></fA09><fA11 i1="01" i2="1"><s1>HOGG (Alan G.)</s1></fA11><fA11 i1="02" i2="1"><s1>FIFIELD (L. Keith)</s1></fA11><fA11 i1="03" i2="1"><s1>PALMER (Jonathan G.)</s1></fA11><fA11 i1="04" i2="1"><s1>TURNEY (Chris S. M.)</s1></fA11><fA11 i1="05" i2="1"><s1>GALBRAITH (Rex)</s1></fA11><fA12 i1="01" i2="1"><s1>RAMSEY (Christopher Bronk)</s1><s9>ed.</s9></fA12><fA12 i1="02" i2="1"><s1>HIGHAM (Thomas F. G.)</s1><s9>ed.</s9></fA12><fA14 i1="01"><s1>Radiocarbon Laboratory, University of Waikato, Private Bag</s1><s2>Hamilton</s2><s3>NZL</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University</s1><s2>Canberra ACT 0200</s2><s3>AUS</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Gondwana Tree Ring Laboratory, P.O. Box 64</s1><s2>Tai Tapu, Canterbury 8150</s2><s3>NZL</s3><sZ>3 aut.</sZ></fA14><fA14 i1="04"><s1>GeoQuEST Research Centre, School of Earth and Environmental Sciences, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>4 aut.</sZ></fA14><fA14 i1="05"><s1>Department of Statistical Science, University College London, Gower Street</s1><s2>London WC1E 6BT</s2><s3>GBR</s3><sZ>5 aut.</sZ></fA14><fA15 i1="01"><s1>Oxford Radiocarbon Accelerator Unit, Research Laboratory for Archaeology and the History of Art, Dyson Perrins Building, University of Oxford</s1><s2>Oxford OX1 3QY</s2><s3>GBR</s3><sZ>1 aut.</sZ></fA15><fA20><s1>379-391</s1></fA20><fA21><s1>2007</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>502B</s2><s5>354000174300270220</s5></fA43><fA44><s0>0000</s0><s1>© 2008 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1/2 p.</s0></fA45><fA47 i1="01" i2="1"><s0>08-0357964</s0></fA47><fA60><s1>P</s1><s2>C</s2></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Radiocarbon</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Although high-sensitivity liquid scintillation (LS) spectroscopy is theoretically capable of producing finite radiocarbon ages in the 50,000- to 70,000-yr range, there is little evidence in the literature that meaningful dates in this time period have been obtained. The pressing need to undertake calibration beyond 26 kyr has resulted in the regular publication of <sup>14</sup>C results in excess of 50 kyr, yet very little effort has been made to demonstrate their accuracy or precision. There is a paucity of systematic studies of the techniques required to produce reliable dates close to background and the methods needed to assess contamination from either in situ sources or laboratory handling and processing. We have studied the requirements for producing accurate and reliable dates beyond 50 kyr. Laboratory procedures include optimization of LS spectrometers to obtain low and stable non-<sup>14</sup>C background count rates, use of low-background counting vials, large benzene volumes, long counting times, and preconditioning of vacuum lines. We also discuss the need for multiple analyses of a suitable material containing no original <sup>14</sup>C (background blank) and the application of an appropriate statistical model to compensate for variability in background contamination beyond counting statistics. Accurate and reproducible finite ages >60 kyr are indeed possible by high-sensitivity LS spectroscopy, but require corroborating background blank data to be defensible.</s0></fC01><fC02 i1="01" i2="A"><s0>52618</s0><s1>I</s1></fC02><fC02 i1="02" i2="A"><s0>526</s0></fC02><fC03 i1="01" i2="A" l="FRE"><s0>Radiocarbone</s0><s2>NI</s2><s2>FM</s2><s5>01</s5></fC03><fC03 i1="01" i2="A" l="ENG"><s0>Radiocarbon</s0><s2>NI</s2><s2>FM</s2><s5>01</s5></fC03><fC03 i1="02" i2="A" l="FRE"><s0>Datation</s0><s5>02</s5></fC03><fC03 i1="02" i2="A" l="ENG"><s0>Dating</s0><s5>02</s5></fC03><fC03 i1="03" i2="A" l="FRE"><s0>Bois</s0><s5>03</s5></fC03><fC03 i1="03" i2="A" l="ENG"><s0>Wood</s0><s5>03</s5></fC03><fC03 i1="04" i2="H" l="FRE"><s0>Echantillon</s0><s5>04</s5></fC03><fC03 i1="04" i2="H" l="ENG"><s0>Sample</s0><s5>04</s5></fC03><fC03 i1="05" i2="H" l="FRE"><s0>Méthode</s0><s5>05</s5></fC03><fC03 i1="05" i2="H" l="ENG"><s0>Method</s0><s5>05</s5></fC03><fC03 i1="06" i2="A" l="FRE"><s0>Calibration</s0><s2>NI</s2><s2>FM</s2><s5>06</s5></fC03><fC03 i1="06" i2="A" l="ENG"><s0>Calibration</s0><s2>NI</s2><s2>FM</s2><s5>06</s5></fC03><fC03 i1="07" i2="A" l="FRE"><s0>Spectroscopie à scintillation liquide</s0><s4>INC</s4><s5>31</s5></fC03><fC03 i1="08" i2="A" l="FRE"><s0>Pollution</s0><s4>CD</s4><s5>96</s5></fC03><fC03 i1="08" i2="A" l="ENG"><s0>Pollution</s0><s4>CD</s4><s5>96</s5></fC03><fN21><s1>224</s1></fN21></pA><pR><fA30 i1="01" i2="1" l="ENG"><s1>International Radiocarbon Conference</s1><s2>19</s2><s3>Oxford GBR</s3><s4>2006-04-03</s4></fA30></pR></standard></inist><affiliations><list><country><li>Australie</li><li>Nouvelle-Zélande</li><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement><orgName><li>University College de Londres</li></orgName></list><tree><country name="Nouvelle-Zélande"><noRegion><name sortKey="Hogg, Alan G" sort="Hogg, Alan G" uniqKey="Hogg A" first="Alan G." last="Hogg">Alan G. Hogg</name></noRegion><name sortKey="Palmer, Jonathan G" sort="Palmer, Jonathan G" uniqKey="Palmer J" first="Jonathan G." last="Palmer">Jonathan G. Palmer</name></country><country name="Australie"><noRegion><name sortKey="Fifield, L Keith" sort="Fifield, L Keith" uniqKey="Fifield L" first="L. Keith" last="Fifield">L. Keith Fifield</name></noRegion><name sortKey="Turney, Chris S M" sort="Turney, Chris S M" uniqKey="Turney C" first="Chris S. M." last="Turney">Chris S. M. Turney</name></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Galbraith, Rex" sort="Galbraith, Rex" uniqKey="Galbraith R" first="Rex" last="Galbraith">Rex Galbraith</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Archeologie/explor/ArcheoDatationV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000042 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000042 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Archeologie
|area= ArcheoDatationV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= Francis:08-0357964
|texte= ROBUST RADIOCARBON DATING OF WOOD SAMPLES BY HIGH-SENSITIVITY LIQUID SCINTILLATION SPECTROSCOPY IN THE 50-70 KYR AGE RANGE
}}
| This area was generated with Dilib version V0.6.39. |  |