Positron annihilation and optical studies of natural brown type i diamonds

Paul Guagliardo, Keal Byrne, J. Chapman, K. Sudarshan, Sergey Samarin, James Williams

Research output: Contribution to journalArticle

4 Citations (Scopus)


Positron annihilation measurements of natural brown type I diamonds revealed that they contain monovacancy-type defects and large vacancy clusters. The latter defect type was absent in clear diamonds. Both the intensity of the positron vacancy cluster lifetime and the S-parameter were found to increase with the intensity of brown colouration determined by optical absorption measurements. No correlation was found between the nitrogen content and the positron annihilation parameters. © 2013 Elsevier B.V.
Original languageEnglish
Pages (from-to)37-40
JournalDiamond and Related Materials
Publication statusPublished - 2013

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