Naslov
Quantum efficiency improvement of a cesium based resonance fluorescence detector by helium-induced collisional excitation energy transfer

Autori
Correll, Tiffany L. ; Horvatić, Vlasta ; Omenetto, Nicoló ; Vadla, Čedomil ; Winefordner, James D.

Izvornik
Spectrochimica acta. Part B, Atomic spectroscopy (0584-8547) 60 (2005), 6; 765-774

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
resonance fluorescence detector; atomic line filter; energy transfer; collision transfer; cesium; alkali-noble gas mixture

Sažetak
Quantum efficiency improvement of a cesium based resonance fluorescence detector (RFD) was achieved by enhancing the transfer in a particular channel of the RFD excitation scheme with noble gas-induced collisional excitation energy transfer (CEET). The influence of Cs-Ar and Cs-He collisional mixing between the 6D and 7P states in cesium on the quantum efficiency of the 6S -> 6D -> 7P -> 6S excitation scheme was investigated by fluorescence measurements at relevant transitions. Ar-induced CEET was found to have little effect on the fluorescence response and quantum efficiency of the Cs RFD excitation scheme. However, a 35 fold quantum efficiency increase in the cesium resonance fluorescence detector response at only moderate He pressures was observed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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