Laser-induced two-photon ionization of acridine in aqueous solution
β Scribed by Ariette Kellmann; Francis Tfibel
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 437 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
The present aork reports the formanon of hydrated electrons upon excnatton of a'queous solunons of acndine usmg the thud harmomc oi a Nd-glass laser. The experimental results mdlcate that acndme is phototomzed VIZI a ccnsecutive txo-photon mechanljm in which the mtermetite states are both the first excited singlet and the lowest txipIet. However the tnplet pathway IS shown to be less efiictent than the smglet pathway.
π SIMILAR VOLUMES
The iotiation thxeshold of fluoranthene and of TMPD in rz-pentane was determmed by laser two-photon ionization (TPI) and found to be 450 c-0.05 and 3 88 + O-05 eV respectmely. For both molecules the TPI spectra show distinct structure due to autoionization. For fluoranthene the TPI spectrum suggests
Two-photon laser-induced fluorescence and "2+ 1" multiphoton ionization detection of silicon (3PJ., 'DJ atoms was accomplished using the 4 'PJ + 3 'P,,.., 4 'S, t3 'Pr, and the 4 ID,+3 'Dz resonant two-photon transitions. Silicon atoms were produced in their ground 'Pp (J" =0,1,2) and first singlet
Study of the photcuomzatlon of aqueous tryptophan by the 265 nm harmoruc of the Nd-glass laser at dfierent hser pulse durations and energies estabhshed that ths reaction IS due to one-photon as well as two-photon absorption, the latter occurrmg mamly ma the evxed smglet State Adchtlon of the 353. or
A method is presented which would allow the determination of the absolute number density of 0 atoms in discharge and postdischarge by simultaneous measurements of the number of photoions created from 2 + 1 resonant-enhanced multiphotoionization (REMPI) of atomic oxygen and the LIF (laser-induced flu
We report a spectroscopic study of consecutive two-photon absorption of azulene excited in the range 32800-42000 cm-', which provides infcrmntion concerning the cross sections for the S 1 + S3 and the S1 \* Sa traxsitions. \* Eqatum to ref. [4]. S. hiurata has determined Y(S2 + SO) = O.G31-0.032 [S