Magnetically manipulated atomic and molecular beams

Gil Alexandrowicz, Technion - Israel Institute of Technology
Event Date and Time: 
Mon, 2016-06-20 14:00 - 15:00
Chem D-215
Local Contact: 
Roman Krems
Intended Audience: 

A common theme to the activities in our group is magnetically manipulating beams of atoms and molecules. In this talk I will briefly describe the different types of experiments which use magnetic manipulations.  In the first type we exploit the nuclear spin of a helium-3 atom to perform time-depended atom-interferometry experiments. This setup which is called a helium spin echo spectrometer [1], is capable of measuring very small energy changes during the scattering event (sub micro eV) and has the capability of measuring surface motion on an atomic scale and on a time scale of pico to nanoseconds (e.g. [2]), a range which is inaccessible using conventional surface science techniques.  In the second type of experiments, we magnetically manipulate molecular beams. One use of these magnetic manipulations is spin isomer separation of small molecules, for example the separation of ortho and para H2O molecules [3-4]. I will describe these experiments and our attempts to develop a  unique ultra-sensitive NMR spectrometer which uses the ortho-H2O beam to measure the magnetic resonance signal from a single surface layer of water molecules.  Finally, I will present a new approach we are pursuing in our lab, where we operate the spin echo setup mentioned above with a molecular beam of hydrogen. This combination forms a molecular interferometry setup, which measures the quantum interference between the zeeman and rotational states of a molecule within a magnetic field before and after it scatters from a a solid surface.


[1] Science. 304, 1790 (2004)

[2] Journal of Physical Chemistry Letters., 2015, 6, 4165 (2015).

[3] Science, 331, 319 (2011)

[4] Physical Review A, 86, 062710 (2012)

Website development by Checkmark Media. Designed by Armada.

a place of mind, The University of British Columbia

Faculty of Science
Department of Physics and Astronomy
6224 Agricultural Road
Vancouver, BC V6T 1Z1
Tel 604.822.3853
Fax 604.822.5324

Emergency Procedures | Accessibility | Contact UBC | © Copyright The University of British Columbia