Diamond CL spectrum, 7 keV e- beam, LN2 (77K), Tomkins et al. 2022

Diamond CL spectrum, 7 keV e^- beam, LN₂ (77K), Tomkins et al. 2022

Description	CL spectrum of Diamond
Reference	Tomkins et al. 2022 Tomkins, A., Wilson, N., MacRae, C., Salek, A.; Field, M., Brand, H., Langendam, A., Stephen, N., Torpy, A., Pintér, Z., Jennings, L., and McCulloch, D. Sequential Lonsdaleite to Diamond Formation in Ureilite Meteorites via In Situ Chemical Fluid/Vapor Deposition, PNAS, 2022(119) https://doi.org/10.1073/pnas.2208814119
Date measured	2020-08-05
Material	Diamond [ C ] A rare blue diamond from India, in the Smithsonian National Museum of Natural History (G3551-00) © Photo by Chip Clark, via Smithsonian National Museum of Natural History
Specimen	NWA 7983 [Monash University], Morocco Cathodoluminescence overlay on EPMA chemical phase map of lonsdaleite and diamond in NWA7983 ureilite (Tomkins et al. 2022)
Specimen temperature	LN₂ (77K)
Technique	Cathodoluminescence (CL)
Instrument	JEOL 8530F
Probe	7 keV electron beam
Beam current	80.2 nA
Probe diameter	0.5 μm
Det. technology	CCD, Si, Peltier cooled
Acquisition time	6 s
Channel count	1024
Wavelength range	199.467 … 970.586 nm
Intensity range	11.9309 … 73072.7 counts
Integral	1.9035×10⁷ counts

CL spectra of Lonsdaleite and Diamond