Wang, S. and van der Burgt, Peter J.M. and Corr, J.J. and McConkey, J.W. and Madison, D. (1994) Coherent Excitation of Ar 4s'[1/2] and 4s[3/2] by Low Energy Electrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 27 (2). pp. 329-339. ISSN 0953-4075

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Abstract

Electron-photon coincidence measurements are reported of the excitation of the 4s'[1/2]10 state of Ar at incident energies of 20 and 30 eV and scattering angles up to 80 degrees . All values of the rho 00 parameter obtained are very small and not distinguishable from zero within experimental uncertainty. The level of agreement with available perturbative theories is quite good but significant discrepancies are noted at some angles particularly at the lower impact energy. Previous measurements from this laboratory of the 4s[3/2]10 state are reanalyzed in terms of the ratio of the exchange to direct excitation cross sections.

Item Type:	Article
Keywords:	Electron-photon coincidence measurements; Low Energy Electrons;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	9810
Identification Number:	g/10.1088/0953-4075/27/2/010
Depositing User:	Dr Peter van der Burgt
Date Deposited:	22 Aug 2018 14:56
Journal or Publication Title:	Journal of Physics B: Atomic, Molecular and Optical Physics
Publisher:	IOP Publishing
Refereed:	Yes
URI:	http://iopscience.iop.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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