SAMOP 2021 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 5: Miscellaneous
MO 5.4: Vortrag
Donnerstag, 23. September 2021, 11:30–11:45, H2
Penning Electron Spectroscopy of Chiral Camphor Molecules Embedded in Helium Nanodroplets — •Subhendu De1, S. Mandal2, Sanket Sen3, L. Ben Ltaief1,4, Ram Gopal5, R. Richter6, M. Coreno7, S. Turchini7, D. Catone7, N. Zema7, M. Mudrich1,4, V. Sharma3, and S.R. Krishnan1 — 1QuCenDiEM group and Dept. of Physics, Indian Institute of Technology Madras, Chennai, India. — 2Indian Institute of Science Education and Research, Pune, India. — 3Indian Institute of Technology Hyderabad, Kandi, India. — 4Department of Physics and Astronomy, Aarhus University, Aarhus C. — 5Tata Institute of Fundamental Research, Hyderabad, Telangana, India. — 6Elettra-Sincrotrone Trieste, Basovizza, Italy — 7Istituto di Struttura della Materia - Consiglio Nazionale delle Ricerche (ISM-CNR), Trieste, Italy.
We performed Penning electron spectroscopy of chiral Camphor molecules embedded in cold sub-Kelvin He nanodroplets (∼ 0.4 K). We have employed a velocity map imaging (VMI) spectrometer to measure kinetic energy spectra and angular distributions of photoelectrons in coincidence with photoions detected by the time-of-flight (ToF) technique. When photoexcited at hν=21.43 eV , there is a significant transfer of excitation energy from the host atoms to the dopant molecules leading to the Penning ionization [1,2] of the dopant molecules. From, these spectra, we discern details of the excited states of fragment ions and photoelectron spectra associated with them.
[1] D. Buchta, et al. 2013 J. Phys. Chem. A, 117, 4394.
[2] L. Ben Ltaief et al. 2021 J Low Temp Phys, 202, 444-455.