Time-resolved study of recoil-induced rotation by X-ray pump - X-ray probe spectroscopy.

ABSTRACT: Modern stationary X-ray spectroscopy is unable to resolve rotational structure. In the present paper, we propose to use time-resolved two color X-ray pump-probe spectroscopy with picosecond resolution for real-time monitoring of the rotational dynamics induced by the recoil effect. The proposed technique consists of two steps. The first short pump X-ray pulse ionizes the valence electron, which transfers angular momentum to the molecule. The second time-delayed short probe X-ray pulse resonantly excites a 1s electron to the created valence hole. Due to the recoil-induced angular momentum the molecule rotates and changes the orientation of transition dipole moment of core-excitation with respect to the transition dipole moment of the valence ionization, which results in a temporal modulatio

SUBMITTER: Liu JC 

PROVIDER: S-EPMC8925299 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature