Spectroscopy of divalent samarium in alkaline-earth fluorides
Source abstract
Abstract
Abstract Optical spectra (absorption, luminescence, decay of emission, spectra with time resolution) of Sm2+ ions in alkaline-earth fluoride crystals (CaF2, SrF2, BaF2) in the wavelength range 120–900 nm at 7–300 K were studied. By additive coloration of about 60% of the original Sm3+ is converted to Sm2+. One component of the decay of the Sm2+ emission was observed in BaF2 crystals with a lifetime of 16 ms (a slow component) and in CaF2 crystals with a lifetime of 1.3 μs (fast component) at low temperature. In SrF2 crystals, two decay of luminescence components are found in the millisecond and nanosecond time range. The luminescence spectra of the slow and fast components in CaF2, SrF2, BaF2 are similar, which confirms their attribution to forbidden 4f-4f and allowed 5d-4f transitions, respectively. The results obtained made it possible to clarify the position of the excited levels of Sm2+ 4f(5D0) and 5d(eg) relative to the bottom of the conduction band of alkaline-earth fluorides.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Inorganic Fluorides and Related Compounds · Solid State Laser Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
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