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Journal Articles

Mass-resolved momentum imaging of three dichloroethylene isomers by femtosecond laser-induced coulomb explosion

Wada, Yoriko*; Akagi, Hiroshi*; Kumada, Takayuki; Itakura, Ryuji*; Wakabayashi, Tomonari*

Photochem (Internet), 2(3), p.798 - 809, 2022/09

https://doi.org/10.3390/photochem2030051

Coulomb explosion experiments using 60 fs laser pulses were conducted for structural characterization of three dichloroethylene isomers. Under laser intensity at 1.8 $$times$$ 10$$^{14}$$ W/cm$$^2$$, mass-resolved momentum imaging (MRMI) for selected fragment ions of $$^{35}$$Cl$$^+$$ and C$$^{2+}$$ revealed different patterns for the three isomers. The C$${2+}$$ ion fragmented from multiply charged trans-1,2-DCE was forced to leave perpendicularly to the direction of the laser polarization, due to recoil forces from adjacent cations. In contrast, the fast ions of C$${2+}$$ from cis-1,2-DCE exhibited an isotropic distribution, whereas the fast ions of C$${2+}$$ from 1,1-DCE recoiled along the laser polarization together with the slow C$${2+}$$ ions, and thereby distinction of the three isomers was demonstrated. Coulomb explosion occurs predominantly at specific orientation, which is useful for potential applications of MRMI analysis to molecular structure assays.

Journal Articles

Simultaneous measurements of superradiance at multiple wavelength from helium excited states, 2; Analysis

Ohae, Chiaki*; Harries, J.; Iwayama, Hiroshi*; Kawaguchi, Kentaro*; Kuma, Susumu*; Miyamoto, Yuki*; Nagasono, Mitsuru*; Nakajima, Kyo*; Nakano, Itsuo*; Shigemasa, Eiji*; et al.

Journal of the Physical Society of Japan, 85(3), p.034301_1 - 034301_10, 2016/03

https://doi.org/10.7566/JPSJ.85.034301
 Times Cited Count：8 Percentile：53.38(Physics, Multidisciplinary)

Oral presentation

Multiple-transition superradiance from EUV-FEL excited helium atoms, 2; Experiment

Ohae, Chiaki*; Harries, J.; Iwayama, Hiroshi*; Kuma, Susumu*; Miyamoto, Yuki*; Nagasono, Mitsuru*; Nakajima, Kyo*; Shigemasa, Eiji*; Wakabayashi, Tomonari*; Sasao, Noboru*

no journal, , 

no abstracts in English

Oral presentation

Multiple-wavelength superfluorescence in helium following FEL excitation; Ultrafast experiments and simulations

Harries, J.; Ohae, Chiaki*; Iwayama, Hiroshi*; Kawaguchi, Kentaro*; Kuma, Susumu*; Miyamoto, Yuki*; Nagasono, Mitsuru*; Nakajima, Kyo*; Yabashi, Itsuo*; Shigemasa, Eiji*; et al.

no journal, , 

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