6533b82ffe1ef96bd1294f82
RESEARCH PRODUCT
Isotope Effect on the Infrared Photoluminescence Decay of Interstitial Oxygen Molecules in Amorphous SiO2
Koichi KajiharaKoichi KajiharaLinards SkujaLinards SkujaMasahiro HiranoHayato KamiokaHideo HosonoTaisuke Miurasubject
PhotoluminescenceIsotopeInfraredChemistryGeneral EngineeringAnalytical chemistryGeneral Physics and AstronomyQuantum yieldchemistry.chemical_elementOxygenAmorphous solidKinetic isotope effectAtomic physicsGround statedescription
The decay constants of the a1Δg(v=0)→X3Σg-(v=0) infrared photoluminescence (PL) of isotopically-labeled oxygen molecules 16O18O and 18O2 dissolved in the interstitial voids of a-SiO2 are ~1.7 and ~2.5 times larger than that of 16O2. This difference originates from the isotope shift in the energy of the nonradiative transitions from the a state to the vibronic levels of the X ground state. Calibration of the PL quantum yield using the measured decay constants is essential to measure the correct concentration of isotopically-labeled interstitial O2.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-05-01 | Applied Physics Express |