Author/Authors :
Wang، نويسنده , , Qiaoqiao and Dyakov، نويسنده , , Yuri A. and Wu، نويسنده , , Di and Zhang، نويسنده , , Dongdong and Jin، نويسنده , , Mingxing and Liu، نويسنده , , Fuchun and Liu، نويسنده , , Hang-Wei Hu، نويسنده , , Zhan and Ding، نويسنده , , Dajun and Mineo، نويسنده , , Hirobumi and Teranishi، نويسنده , , Yoshiaki and Chao، نويسنده , , Sheng Der and Lin، نويسنده , , Sheng Hsien and Kosheleva، نويسنده , , O.K. and Meb، نويسنده ,
Abstract :
Ionization and dissociation of 2- and 3-methyl cyclopentanones have been investigated in molecular beams by their irradiation with intense 394 and 788 nm laser fields with pulse duration of 90 fs and intensity of 3 × 1013–4 × 1014 W/cm2. The analysis of the resulting mass spectra allowed us to discern the effects of methyl substitution and its position on the outcome of ionization/dissociation processes induced by the intense femtosecond laser field. Generalized Keldysh-Faisal-Reiss (g-KFR) and ab initio G3(MP2,CCSD)//B3LYP/6–31G∗/RRKM theoretical calculations helped to uncover the formation mechanism of major ionic fragments observed in the mass spectra including C5H10+, C4H6O+, C3H3O+, C3H4O+, C3Hx+, and C2Hx+.
