FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2006150473> ?p ?o ?g. }

• W2006150473 endingPage "861" @default.
• W2006150473 startingPage "843" @default.
• W2006150473 abstract "We have undertaken a study of the common green or orange-brown spots at the surface of rough diamond specimens, which are caused by alpha particles emanating from radioactive sources outside the diamond. Richly coloured haloes represent elevated levels of structural damage, indicated by strong broadening of the main Raman band of diamond, intense strain birefringence, and up-doming of spots due to their extensive volume expansion. Green radio-colouration was analogously generated through the irradiation of diamond with 8.8 MeV helium ions. The generation of readily visible radio-colouration was observed after irradiating diamond with ≥1015 He ions per cm2. The accumulation of such a high number of alpha particles requires irradiation of the diamond from a radioactive source over long periods of time, presumably hundreds of millions of years in many cases. In the samples irradiated with He ions, amorphisation was observed in volume areas where the defect density exceeded 5 × 10−3 Å−3 (or 0.03 dpa; displacements per target atom). In contrast, graphitisation as a direct result of the ion irradiation was not observed. The green colouration transformed to brown at moderate annealing temperatures (here 450 °C). The colour transformation is associated with only partial recovery of the radiation damage. The colour change is mainly due to the destruction of the GR1 centre, explained by trapping of vacancies at A defects to form the H3 centre. An activation energy of ~2.4 ± 0.2 eV was determined for the GR1 reduction. The H3 centre, in turn, causes intense yellowish-green photoluminescence under ultraviolet illumination. Radio-colouration and associated H3 photoluminescence are due to point defects created by the ions irradiated, whereas lattice ionisation is of minor importance. This is concluded from the depth distribution of the colouration and the photoluminescence intensity (which corresponds to the defect density but not the ionisation distribution pattern). The effect of the implanted He ions themselves on the colour and photoluminescence seems to be negligible, as radio-colouration and H3 emission were analogously produced through irradiation of diamond with C ions. The photoluminescence emission becomes observable at extremely low defect densities on the order of 10−6 Å−3 (or 0.000006 dpa) and is suppressed at moderate defect densities of ~5 × 10−4 Å−3 (or ~0.003 dpa). Intensely brown-coloured diamond hence does not show the H3 emission anymore. Anneals up to 1,600 °C has reduced considerably irradiation damage and radio-colouration, but the structural reconstitution of the diamond (and its de-colouration) was still incomplete." @default.
• W2006150473 created "2016-06-24" @default.
• W2006150473 creator A5001593712 @default.
• W2006150473 creator A5006294552 @default.
• W2006150473 creator A5010088659 @default.
• W2006150473 creator A5010314635 @default.
• W2006150473 creator A5012488552 @default.
• W2006150473 creator A5049753744 @default.
• W2006150473 creator A5059532452 @default.
• W2006150473 creator A5061703044 @default.
• W2006150473 creator A5064107017 @default.
• W2006150473 creator A5070596446 @default.
• W2006150473 creator A5084560620 @default.
• W2006150473 date "2012-12-11" @default.
• W2006150473 modified "2023-10-01" @default.
• W2006150473 title "Radio-colouration of diamond: a spectroscopic study" @default.
• W2006150473 cites W1535211234 @default.
• W2006150473 cites W156254087 @default.
• W2006150473 cites W1965383209 @default.
• W2006150473 cites W1965692883 @default.
• W2006150473 cites W1966410152 @default.
• W2006150473 cites W1967824510 @default.
• W2006150473 cites W1970962354 @default.
• W2006150473 cites W1974762423 @default.
• W2006150473 cites W1978795315 @default.
• W2006150473 cites W1979416452 @default.
• W2006150473 cites W1979750460 @default.
• W2006150473 cites W1981003391 @default.
• W2006150473 cites W1981248407 @default.
• W2006150473 cites W1984815980 @default.
• W2006150473 cites W1985451612 @default.
• W2006150473 cites W1989062073 @default.
• W2006150473 cites W1992297374 @default.
• W2006150473 cites W1995663588 @default.
• W2006150473 cites W1997676935 @default.
• W2006150473 cites W2001500348 @default.
• W2006150473 cites W2004537726 @default.
• W2006150473 cites W2007440758 @default.
• W2006150473 cites W2010250255 @default.
• W2006150473 cites W2010613803 @default.
• W2006150473 cites W2025017963 @default.
• W2006150473 cites W2026318104 @default.
• W2006150473 cites W2027003688 @default.
• W2006150473 cites W2027302940 @default.
• W2006150473 cites W2027686944 @default.
• W2006150473 cites W2028358301 @default.
• W2006150473 cites W2032069269 @default.
• W2006150473 cites W2033944901 @default.
• W2006150473 cites W2038145519 @default.
• W2006150473 cites W2038217034 @default.
• W2006150473 cites W2040909006 @default.
• W2006150473 cites W2044447871 @default.
• W2006150473 cites W2045496714 @default.
• W2006150473 cites W2046045842 @default.
• W2006150473 cites W2046664144 @default.
• W2006150473 cites W2052314341 @default.
• W2006150473 cites W2055144690 @default.
• W2006150473 cites W2057104877 @default.
• W2006150473 cites W2057699032 @default.
• W2006150473 cites W2059055579 @default.
• W2006150473 cites W2063424128 @default.
• W2006150473 cites W2064362324 @default.
• W2006150473 cites W2064375098 @default.
• W2006150473 cites W2066531939 @default.
• W2006150473 cites W2067411838 @default.
• W2006150473 cites W2067693627 @default.
• W2006150473 cites W2067740193 @default.
• W2006150473 cites W2070258122 @default.
• W2006150473 cites W2071024692 @default.
• W2006150473 cites W2071947777 @default.
• W2006150473 cites W2074113597 @default.
• W2006150473 cites W2074779199 @default.
• W2006150473 cites W2076815534 @default.
• W2006150473 cites W2076950384 @default.
• W2006150473 cites W2078668822 @default.
• W2006150473 cites W2078710740 @default.
• W2006150473 cites W2081683263 @default.
• W2006150473 cites W2089632305 @default.
• W2006150473 cites W2089747736 @default.
• W2006150473 cites W2091378764 @default.
• W2006150473 cites W2092041611 @default.
• W2006150473 cites W2092337895 @default.
• W2006150473 cites W2093198399 @default.
• W2006150473 cites W2106099812 @default.
• W2006150473 cites W2113789993 @default.
• W2006150473 cites W2115032894 @default.
• W2006150473 cites W2115917828 @default.
• W2006150473 cites W2116964496 @default.
• W2006150473 cites W2142134388 @default.
• W2006150473 cites W2171898868 @default.
• W2006150473 cites W2284146771 @default.
• W2006150473 cites W2312705184 @default.
• W2006150473 cites W2321789190 @default.
• W2006150473 cites W2333779305 @default.
• W2006150473 cites W2657464135 @default.
• W2006150473 cites W4245401043 @default.
• W2006150473 cites W609648047 @default.
• W2006150473 cites W2057155128 @default.

• next