TY - JOUR
T1 - X-ray excited optical luminescence of CaF2
T2 - 6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications, ICOOPMA 2014
AU - Chen, W.
AU - Ma, L.
AU - Schaeffer, R.
AU - Hoffmeyer, R.
AU - Sham, T.
AU - Belev, G.
AU - Kasap, S.
AU - Sammynaiken, R.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2015/6/17
Y1 - 2015/6/17
N2 - Secondary optical processes are becoming more and more important in health and environmental applications. Ultraviolet produced from secondary emission or scintillation can damage DNA by direct photoexcitation or by the creation of reactive oxygen species. X-ray Excited Optical Luminescence (XEOL) and Time Resolved XEOL (TRXEOL) results for the fast emitter, CaF2:ZnO, that have been treated by heating in air and in vacuum, show that the scintillation from the Self Trapped Exciton (STE) emission of CaF2 at 282 nm is dominated by a slow process (>100 ns). A faster but weaker 10 ns component is also present. The ZnO and CaF2 show independent emission. The ZnO bandgap emission at 390 nm has dominant lifetimes of less than 1 ns.
AB - Secondary optical processes are becoming more and more important in health and environmental applications. Ultraviolet produced from secondary emission or scintillation can damage DNA by direct photoexcitation or by the creation of reactive oxygen species. X-ray Excited Optical Luminescence (XEOL) and Time Resolved XEOL (TRXEOL) results for the fast emitter, CaF2:ZnO, that have been treated by heating in air and in vacuum, show that the scintillation from the Self Trapped Exciton (STE) emission of CaF2 at 282 nm is dominated by a slow process (>100 ns). A faster but weaker 10 ns component is also present. The ZnO and CaF2 show independent emission. The ZnO bandgap emission at 390 nm has dominant lifetimes of less than 1 ns.
UR - http://www.scopus.com/inward/record.url?scp=84939222465&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/619/1/012047
DO - 10.1088/1742-6596/619/1/012047
M3 - Conference article
AN - SCOPUS:84939222465
SN - 1742-6588
VL - 619
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012047
Y2 - 27 July 2014 through 1 August 2014
ER -