Details

Autor(en) / Beteiligte

• Yoshikawa, Kazuki
• Kanno, Manabu
• Xue, Hao
• Kishimoto, Naoki
• Goto, Soki
• Ota, Fukiko
• Tamura, Yoshiaki
• Trinter, Florian
• Fehre, Kilian
• Kaiser, Leon
• Stindl, Jonathan
• Tsitsonis, Dimitrios
• Schöffler, Markus
• Dörner, Reinhard
• Boll, Rebecca
• Erk, Benjamin
• Mazza, Tommaso
• Mullins, Terence
• Rivas, Daniel E
• Schmidt, Philipp
• Usenko, Sergey
• Meyer, Michael
• Wang, Enliang
• Rolles, Daniel
• Rudenko, Artem
• Kukk, Edwin
• Jahnke, Till
• Díaz-Tendero, Sergio
• Martín, Fernando
• Hatada, Keisuke
• Ueda, Kiyoshi

Titel

Time-resolved photoelectron diffraction imaging of methanol photodissociation involving molecular hydrogen ejection

Ist Teil von

• Physical chemistry chemical physics : PCCP, 2024-10, Vol.26 (38), p.25118-25130

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Imaging ultrafast atomic and molecular hydrogen motion with femtosecond time resolution is a challenge for ultrafast spectroscopy due to the low mass and small scattering cross section of the moving neutral hydrogen atoms and molecules. Here, we propose time- and momentum-resolved photoelectron diffraction (TMR-PED) as a way to overcome limitations of existing methodologies and illustrate its performance using a prototype molecular dissociation process involving the sequential ejection of a neutral hydrogen molecule and a proton from the methanol dication. By combining state-of-the-art molecular dynamics and electron-scattering methods, we show that TMR-PED allows for direct imaging of hydrogen atoms in action. More specifically, the fingerprint of hydrogen dynamics reflects the time evolution of polarization-averaged molecular-frame photoelectron angular distributions (PA-MFPADs) as would be recorded in X-ray pump/X-ray probe experiments with few-femtosecond resolution. We present the results of two precursor experiments that support the feasibility of this approach.