Structure and photoinduced bond fission dynamics in hydrated clusters by spatial and velocity map imaging

by Mr. Rami Rahimi

Ben-Gurion University Of The Negev

at Quantum optics seminar

Wed, 24 Jun 2020, 16:00
Sacta-Rashi Building for Physics (54), room 207

Abstract

This is a student seminar (from the group of Ilana Bar).
The seminar will be given in Hebrew.
This is a Zoom meeting.
Meeting ID: 991 4474 3154
Password: 925535

The insight into the structures and intrinsic molecular properties of isolated biomolecules and their clusters is of considerable interest and can be revealed by combination of different spectroscopic methods with imaging methods, including spatial map imaging (SMI) and velocity map imaging (VMI). Here, a new approach was developed for characterizing and calculating different SMI patterns, mapping the position coordinates, velocity vectors and the angular distributions of charged particles on a detector. As a first demonstration of this capability the SMI pattern of the ejected photoelectrons (PEs) resulting from the (2 + 1) resonance enhanced multiphoton ionization of H2O molecule in a selected rotational state was measured for the first time. This measured SMI is characterized by a unique vertical intensity profile which was least-square fitted with the values resulting from computed data sets, accounting for various kinetic energies (KEs) and anisotropy parameters, βs. The best-fitted values provide the maximal KE release and βs for the ejected PEs, allowing backward reconstruction of the SMI pattern and the intensity profile. This new approach is expected to be capable to determine the above parameters with improved resolution, particularly for signals of particles suffering from high background levels and in processes that release high KE particles.

Created on 16-06-2020 by Folman, Ron (folman)
Updaded on 16-06-2020 by Folman, Ron (folman)