Alignment, orientation, and Coulomb explosion of difluoroiodobenzene studied with the pixel imaging mass spectrometry (PImMS) camera

作者：Amini Kasra^*; Boll Rebecca; Lauer Alexandra; Burt Michael; Lee Jason W L; Christensen Lauge; Brausse Felix; Mullins Terence; Savelyev Evgeny; Ablikim Utuq; Berrah Nora; Bomme Cedric; Duesterer Stefan; Erk Benjamin; Hoeppner Hauke; Johnsson Per; Kierspel Thomas; Krecinic Faruk; Kuepper Jochen; Mueller Maria; Mueller Erland; Redlin Harald; Rouzee Arnaud; Schirmel Nora; Thogersen Jan; Techert Simone; Toleikis Sven; Treusch Rolf; Trippel Sebastian; Ulmer Anatoli

来源：Journal of Chemical Physics, 2017, 147(1): 013933.

DOI：10.1063/1.4982220

Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C6H3F2I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. The ion side of the spectrometer is equipped with a pixel imaging mass spectrometry camera, a time-stamping pixelated detector that can record the hit positions and arrival times of up to four ions per pixel per acquisition cycle. Thus, the time-of-flight trace and ion momentum distributions for all fragments can be recorded simultaneously. We show that we can obtain a high degree of one-and three-dimensional alignment and mixed-field orientation and compare the Coulomb explosion process induced at both wavelengths.

• 出版日期2017-7-7