First measurements of macroscopic drag currents under the action of photon flux

Details First measurements of macroscopic drag currents under the action of photon flux First measurements of macroscopic drag currents under the action of photon flux

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aps..dmp.d6039h&link_type=abstract

American Physical Society, 36th Meeting of the Division of Atomic, Molecular and Optical Physics, May 17-21, 2005, abstract #D6.

Physics

Scientific paper

Until recently, it was believed that photoelectron angular distributions of atoms and molecules at photon energies below 1 keV is well described by the dipole approximation. While this is true for the angle-integrated total and partial cross sections to which only the squares of the transition matrix elements contribute, recent calculations and measurements [1] have shown that nondipole effects can strongly influence the differential cross sections. These nondipole effects lead to a forward-backward asymmetry in photoelectron emission resulting in a net flux of electrons parallel or anti-parallel to the photon propagation direction. The integrated flux can be measured as a macroscopic current called drag current [2]. With our new instrument we were able to measure these drag currents on a variety of gases such as Ne, Xe, and N2 in the photonenergy range between 80 and 240 eV. Our results show that drag currents are non-negligible electron transport processes even at low photon energies. This may be of importance to fields such as astrophysics or physics of the upper planetary atmospheres. [1] O. Hemmers, R. Guillemin, D.W. Lindle, Rad. Phys. Chem. 70, 123 (2004). [2] M.Ya. Amusia, A.S. Baltenkov, L.V. Chernysheva, Z. Felfli, A.Z. Msezane, and J. Nordgren, Phys. Rev. A 63, 052512 (2001).

Affiliated with

Also associated with

No associations

Rating

First measurements of macroscopic drag currents under the action of photon flux does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with First measurements of macroscopic drag currents under the action of photon flux, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First measurements of macroscopic drag currents under the action of photon flux will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1701360