首页|Laser-fluence dependence of resonance-enhanced multiphoton reduction of trivalent europium
Laser-fluence dependence of resonance-enhanced multiphoton reduction of trivalent europium
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NSTL
Elsevier
Efficiency of the one-color two-photon reduction of trivalent europium mediated by an f-f transition is examined with a nanosecond laser tuned at 394 nm in methanol. The divalent-europium concentration is measured by absorbance at 350 nm. The laser-fluence dependence is obtained by varying both the pulse energy and the beam size, resulting in a fluence range of 10(2)-10(4) mJ cm(-2). An analysis is then performed considering both the two-photon reduction of trivalent europium and the one-photon backward oxidation of divalent europium. The quantum yields of the first and second processes in the reduction are (3.8 +/- 0.6) x 10(-3) and 0.7 +/- 0.2, respectively.
NSTL
Elsevier
