Intense photon emission induced by fracture of γ-irradiated Dy-, Tm-, Sm- and Mn-doped CaSO4 single crystals.
Identifieur interne : 000369 ( PubMed/Corpus ); précédent : 000368; suivant : 000370Intense photon emission induced by fracture of γ-irradiated Dy-, Tm-, Sm- and Mn-doped CaSO4 single crystals.
Auteurs : B P Chandra ; C S Tiwari ; R. SharmaSource :
- Luminescence : the journal of biological and chemical luminescence [ 1522-7243 ]
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Calcium Sulfate, Dysprosium, Luminescent Agents, Manganese, Samarium, Thulium.
- methods : Luminescent Measurements.
- Gamma Rays, Photons.
Abstract
When an γ-irradiated Dy-, Tm-, Sm- or Mn-doped CaSO4 crystal is impulsively deformed, two peaks appear in the ML intensity versus time curve, whereby the first ML peak is found in the deformation region and the second in the post-deformation region of the crystals. In this study, intensities Im1 and Im2 corresponding to first and second ML peaks, respectively, increased linearly with an impact velocity v0 of the piston used to deform the crystals, and times tm1 and tm2 corresponding to the first and second ML peaks, respectively, decreased with impact velocity. Total ML intensity initially increased with impact velocity and then reached a saturation value for higher values of impact velocity. ML intensity increased with increasing γ-doses and size of crystals. Results showed that the electric field produced as a result of charging of newly-created surfaces caused tunneling of electrons to the valence band of the hole-trapping centres. The free holes generated moved in the valence band and their subsequent recombination with electron trapping centres released energy, thereby resulting in excitation of luminescent centres.
DOI: 10.1002/bio.2377
PubMed: 22544509
Links to Exploration step
pubmed:22544509Le document en format XML
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Sharma</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="????"><PubDate><MedlineDate>2013 May-Jun</MedlineDate></PubDate></date><idno type="doi">10.1002/bio.2377</idno><idno type="RBID">pubmed:22544509</idno><idno type="pmid">22544509</idno><idno type="wicri:Area/PubMed/Corpus">000369</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000369</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Intense photon emission induced by fracture of γ-irradiated Dy-, Tm-, Sm- and Mn-doped CaSO4 single crystals.</title><author><name sortKey="Chandra, B P" sort="Chandra, B P" uniqKey="Chandra B" first="B P" last="Chandra">B P Chandra</name><affiliation><nlm:affiliation>Department of Applied Physics, Ashoka Institute of Technology and Management, G.E. Road, Rajnandgaon, 491441 (C.G.), India. bpchandra4@yahoo.co.in</nlm:affiliation></affiliation></author><author><name sortKey="Tiwari, C S" sort="Tiwari, C S" uniqKey="Tiwari C" first="C S" last="Tiwari">C S Tiwari</name></author><author><name sortKey="Sharma, R" sort="Sharma, R" uniqKey="Sharma R" first="R" last="Sharma">R. Sharma</name></author></analytic><series><title level="j">Luminescence : the journal of biological and chemical luminescence</title><idno type="eISSN">1522-7243</idno></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Calcium Sulfate (chemistry)</term><term>Dysprosium (chemistry)</term><term>Gamma Rays</term><term>Luminescent Agents (chemistry)</term><term>Luminescent Measurements (methods)</term><term>Manganese (chemistry)</term><term>Photons</term><term>Samarium (chemistry)</term><term>Thulium (chemistry)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Calcium Sulfate</term><term>Dysprosium</term><term>Luminescent Agents</term><term>Manganese</term><term>Samarium</term><term>Thulium</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Luminescent Measurements</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Gamma Rays</term><term>Photons</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">When an γ-irradiated Dy-, Tm-, Sm- or Mn-doped CaSO4 crystal is impulsively deformed, two peaks appear in the ML intensity versus time curve, whereby the first ML peak is found in the deformation region and the second in the post-deformation region of the crystals. In this study, intensities Im1 and Im2 corresponding to first and second ML peaks, respectively, increased linearly with an impact velocity v0 of the piston used to deform the crystals, and times tm1 and tm2 corresponding to the first and second ML peaks, respectively, decreased with impact velocity. Total ML intensity initially increased with impact velocity and then reached a saturation value for higher values of impact velocity. ML intensity increased with increasing γ-doses and size of crystals. Results showed that the electric field produced as a result of charging of newly-created surfaces caused tunneling of electrons to the valence band of the hole-trapping centres. The free holes generated moved in the valence band and their subsequent recombination with electron trapping centres released energy, thereby resulting in excitation of luminescent centres.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">22544509</PMID><DateCreated><Year>2013</Year><Month>06</Month><Day>11</Day></DateCreated><DateCompleted><Year>2013</Year><Month>12</Month><Day>23</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1522-7243</ISSN><JournalIssue CitedMedium="Internet"><Volume>28</Volume><Issue>3</Issue><PubDate><MedlineDate>2013 May-Jun</MedlineDate></PubDate></JournalIssue><Title>Luminescence : the journal of biological and chemical luminescence</Title><ISOAbbreviation>Luminescence</ISOAbbreviation></Journal><ArticleTitle>Intense photon emission induced by fracture of γ-irradiated Dy-, Tm-, Sm- and Mn-doped CaSO4 single crystals.</ArticleTitle><Pagination><MedlinePgn>275-9</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/bio.2377</ELocationID><Abstract><AbstractText>When an γ-irradiated Dy-, Tm-, Sm- or Mn-doped CaSO4 crystal is impulsively deformed, two peaks appear in the ML intensity versus time curve, whereby the first ML peak is found in the deformation region and the second in the post-deformation region of the crystals. In this study, intensities Im1 and Im2 corresponding to first and second ML peaks, respectively, increased linearly with an impact velocity v0 of the piston used to deform the crystals, and times tm1 and tm2 corresponding to the first and second ML peaks, respectively, decreased with impact velocity. Total ML intensity initially increased with impact velocity and then reached a saturation value for higher values of impact velocity. ML intensity increased with increasing γ-doses and size of crystals. Results showed that the electric field produced as a result of charging of newly-created surfaces caused tunneling of electrons to the valence band of the hole-trapping centres. The free holes generated moved in the valence band and their subsequent recombination with electron trapping centres released energy, thereby resulting in excitation of luminescent centres.</AbstractText><CopyrightInformation>Copyright © 2012 John Wiley & Sons, Ltd.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Chandra</LastName><ForeName>B P</ForeName><Initials>BP</Initials><AffiliationInfo><Affiliation>Department of Applied Physics, Ashoka Institute of Technology and Management, G.E. Road, Rajnandgaon, 491441 (C.G.), India. bpchandra4@yahoo.co.in</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Tiwari</LastName><ForeName>C S</ForeName><Initials>CS</Initials></Author><Author ValidYN="Y"><LastName>Sharma</LastName><ForeName>R</ForeName><Initials>R</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>04</Month><Day>30</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Luminescence</MedlineTA><NlmUniqueID>100889025</NlmUniqueID><ISSNLinking>1522-7235</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D049408">Luminescent Agents</NameOfSubstance></Chemical><Chemical><RegistryNumber>1D4N45714Q</RegistryNumber><NameOfSubstance UI="D004419">Dysprosium</NameOfSubstance></Chemical><Chemical><RegistryNumber>42OD65L39F</RegistryNumber><NameOfSubstance UI="D012493">Samarium</NameOfSubstance></Chemical><Chemical><RegistryNumber>42Z2K6ZL8P</RegistryNumber><NameOfSubstance UI="D008345">Manganese</NameOfSubstance></Chemical><Chemical><RegistryNumber>8RKC5ATI4P</RegistryNumber><NameOfSubstance UI="D013932">Thulium</NameOfSubstance></Chemical><Chemical><RegistryNumber>WAT0DDB505</RegistryNumber><NameOfSubstance UI="D002133">Calcium Sulfate</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N" UI="D002133">Calcium Sulfate</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D004419">Dysprosium</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D005720">Gamma Rays</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D049408">Luminescent Agents</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D008163">Luminescent Measurements</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000379">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D008345">Manganese</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D017785">Photons</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D012493">Samarium</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D013932">Thulium</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000737">chemistry</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2011</Year><Month>8</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2012</Year><Month>2</Month><Day>26</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2012</Year><Month>3</Month><Day>28</Day></PubMedPubDate><PubMedPubDate PubStatus="aheadofprint"><Year>2012</Year><Month>4</Month><Day>30</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>5</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>5</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>12</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1002/bio.2377</ArticleId><ArticleId IdType="pubmed">22544509</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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