Dosimetric properties of gamma-irradiated borate materials

Omar, R.S.; Dhoble, S.J.

doi:10.1016/b978-0-323-85471-9.00009-9

Cited by 1 publication

(2 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1−3 Phosphors based on these compounds are important for the dosimetry of ionizing radiation and personnel monitoring, and medical dosimetry, etc. 4,5 Using borate crystals as a white light-emitting (WLED) diode matrix is a relatively new area of active development. WLEDs have many advantages compared to conventional light sources.…”

Section: Introductionmentioning

confidence: 99%

“…The study of borate systems is a research field developing at the intersection of crystal chemistry and materials science. Borates are promising compounds due to their chemical diversity and many areas of practical applications. − Phosphors based on these compounds are important for the dosimetry of ionizing radiation and personnel monitoring, and medical dosimetry, etc. , …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoluminescence in Cerium-Doped Fluoride Borate Crystals

et al. 2023

View full text Add to dashboard Cite

Antizeolite fluoride borates LiBa 12 (BO 3 ) 7 F 4 (LBBF) doped by Ce 3+ ions demonstrate photoluminescence (PL) and hold promise for use as phosphors in white light-emitting diodes. In this study, we present the results of modeling the electronic and optical properties of Ce-containing LBBF structures where doping atoms are located at different sites of the host lattice. We also consider the presence of F-centers, which exhibit trap states located within the band gap. We further investigate the nonadiabatic excited state electronic dynamics to elucidate electron-relaxation pathways. The nonadiabatic couplings (NACs) calculations provide transition probabilities facilitated by the nuclear movement. The relaxation rates of electrons and holes are calculated using Redfield's theory of the formalism of the reduced density matrix (RDM). The PL spectra are calculated using molecular dynamics (MD) sampling and time-integrated methods along the excited state trajectory based on NACs. Mechanisms of PL in LBBF:Ce 3+ crystals are interpreted using both computational and experimental observations. This work illustrates the dependence of transition energies, intensities, and relaxation rates of Ce-containing LBBF crystals on a selection of doping sites. In addition to analysis of emission band contributed by cerium, this work allows to identify and reproduce spectral lines hypothetically corresponding to the interband and intraband transitions in F-centers of borate crystals, available in the absence of a metal center.

show abstract

Section: Introductionmentioning

confidence: 99%