Author/Authors :
Liu، نويسنده , , Min and Wu، نويسنده , , Chengyin and Wu، نويسنده , , Zhifeng and Liang، نويسنده , , Qingqing and Deng، نويسنده , , Yongkai and Gong، نويسنده , , Qihuang and Sun، نويسنده , , Yue and Xu، نويسنده , , Yuntao and Zhao، نويسنده , , Yujie and Shan، نويسنده , , Xiaobin and Liu، نويسنده , , Fuyi and Sheng، نويسنده , , Liusi، نويسنده ,
Abstract :
We experimentally investigate the ionization and dissociation of two isomers, methyl acetate (CH3COOCH3) and ethyl formate (CH3CH2COOH), irradiated by strong laser pulses with a pulse duration of 7 fs. Strong parent ions are observed for both isomers. However, main fragmental ions are CH3CO+ and CH 3 + for methyl acetate and CH3O+ and C 2 H 4 + for ethyl formate. Through comparing with the single photon ionization mass spectra of these two isomers, we find that these fragments are produced by the direct dissociation of the parent ions in different excited electronic states.
