Low-Energy Electrons and Their Dynamical Correlation with Recoil Ions for Single Ionization of Helium by Fast, Heavy-Ion Impact. Moshammer, R., Ullrich, J., Unverzagt, M., Schmidt, W., Jardin, P., Olson, R., Mann, R., Dörner, R., Mergel, V., Buck, U., & Schmidt-Böcking, H. Physical Review Letters, 73(25):3371–3374, December, 1994. Publisher: American Physical Society
Low-Energy Electrons and Their Dynamical Correlation with Recoil Ions for Single Ionization of Helium by Fast, Heavy-Ion Impact [link]Paper  doi  abstract   bibtex   
Helium single ionization by 3.6 me V/u Ni24+ impact was explored in a kinematically complete experiment by combining a high-resolution recoil-ion momentum spectrometer with a novel 4π low-energy electron analyzer. More than 90% of the "soft electrons" (Ee≲50 eV) are ejected in the forward direction in agreement with classical-trajectory Monte Carlo predictions. The electron longitudinal momentum is not balanced by the longitudinal momentum change of the projectile but mainly by the backwards recoiling He1+ ion. Energy losses of the 0.2 GeV projectiles as small as ΔEP/EP=3.4×10-7 are observable.
@article{Moshammer1994,
	title = {Low-{Energy} {Electrons} and {Their} {Dynamical} {Correlation} with {Recoil} {Ions} for {Single} {Ionization} of {Helium} by {Fast}, {Heavy}-{Ion} {Impact}},
	volume = {73},
	issn = {0031-9007},
	shorttitle = {Phys. {Rev}. {Lett}.},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.73.3371},
	doi = {10.1103/PhysRevLett.73.3371},
	abstract = {Helium single ionization by 3.6 me V/u Ni24+ impact was explored in a kinematically complete experiment by combining a high-resolution recoil-ion momentum spectrometer with a novel 4π low-energy electron analyzer. More than 90\% of the "soft electrons" (Ee≲50 eV) are ejected in the forward direction in agreement with classical-trajectory Monte Carlo predictions. The electron longitudinal momentum is not balanced by the longitudinal momentum change of the projectile but mainly by the backwards recoiling He1+ ion. Energy losses of the 0.2 GeV projectiles as small as ΔEP/EP=3.4×10-7 are observable.},
	number = {25},
	urldate = {2012-11-12},
	journal = {Physical Review Letters},
	author = {Moshammer, R. and Ullrich, J. and Unverzagt, M. and Schmidt, W. and Jardin, P. and Olson, R. and Mann, R. and Dörner, R. and Mergel, V. and Buck, U. and Schmidt-Böcking, H.},
	month = dec,
	year = {1994},
	note = {Publisher: American Physical Society},
	keywords = {\#nosource},
	pages = {3371--3374},
}

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