Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 5: Atomic clusters (together with MO)

A 5.8: Poster

Dienstag, 21. September 2021, 16:30–18:30, P

X-ray induced dissociation dynamics of isoelectronic homo- and heteronuclear clusters — •Frederic Ussling¹ and Co-authors of Community Beamtime Proposal No. 2176² — ¹ETH Zurich, Switzerland — ²European XFEL, Germany

With the development of X-ray free-electron lasers (FELs) high-resolution coherent diffractive imaging (CDI) of individual nanometer-sized specimen like viruses or large biomolecules within a single exposure has become possible [1]. However, the intense X-ray pulse quickly alters the target’s structure and subsequent dissociation dynamics may blur the diffraction pattern thus limiting the resolution [2]. Hence, a profound understanding of the interaction between matter and intense X-rays is indispensable for an unambiguous interpretation of the data. In order to investigate the interaction of light with matter, atomic and molecular clusters can serve as an ideal testbed. In particular, neon and methane are interesting systems for a comparative study of homonuclear and heteronuclear specimen [3], since they have comparable masses and number of electrons. We studied neon and methane clusters irradiated with intense FEL pulses at 1 keV photon energy by recording the resulting ionic fragments. We find that in a certain intensity regime, the fast ejection of protons from the methane cluster strongly influences the dynamics, in line with theoretical work [3].

[1] H.N. Chapman et al., Nature 470, 73-77 (2011)

[2] R. Neutze et al., Nature 406, 752-757 (2000)

[3] P. Di Cintio et al., PRL 111, 123401 (2013)