Ag. Mikosza et al., Magnetic sublevel coincidence spectroscopy and characterisation of the 3(1)D state of Helium, J ELEC SPEC, 97(3), 1998, pp. 215-224
Citations number
23
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Instrumentation, techniques and a statistical analysis are described for th
e accurate observation of the two, and three, particle coincidences of the
scattered energy loss electrons with the two sequential cascading photons f
rom the 3(1)D state of helium excited by incident electrons. A three-dimens
ional histogram data accumulation system enables the two, and three, partic
le true and random coincidences to be analysed. These observations yield in
formation not obtainable in other ways and were used to deduce the scatteri
ng amplitudes, relative phases and their various combinations for the excit
ed 3(1)D state. The measured values agree with the best convergent close co
upling calculations within one standard deviation experimental uncertainty.
(C) 1998 Elsevier Science B.V. All rights reserved.