Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Конференция: International Conference on Atomic and Molecular Pulsed Lasers; Tomsk, RUSSIA; Tomsk, RUSSIA
Год издания: 2004
Идентификатор DOI: 10.1117/12.562975
Ключевые слова: dye; photoreduction; energy yield; doubic-step exitation; laser photolysis
Аннотация: The laser irradiation of the thin films of solid solution of eosin in gelatinous matrix in the first and some upper dyes absorption bands leads to decrease of films optical density due to reaction of photoreduction. In the paper the kinetic of photoreduction of the dye eosin K in polymeric matrix in three cases of irradiation was eПоказать полностьюxperimentally investigated: a) irradiation by N-2 laser (lambda=337nm, second band of absorption, tau = 2 nsec, repetition rate - 100 Hz, average power - 2,2 mW), b) irradiation by Ar- laser (lambda=488 nm, first band of absorption, 6,5-12 mW), c) under a simultaneous action of both Ar- and N-2-lasers. It was demonstrated that the most effective reaction of photoreduction took place in case of direct populating of upper singlet states with probable following nonradiative transition into equienergetic triplet states (energy range 35000 - 45000 sm(-1)).
Журнал: ATOMIC AND MOLECULAR PULSED LASERS V
Выпуск журнала: Vol. 5483
Номера страниц: 147-151
ISSN журнала: 0277786X
Место издания: BELLINGHAM
Издатель: SPIE-INT SOC OPTICAL ENGINEERING