He2+ on He: State-Selective, Scattering-Angle-Dependent Capture Cross Sections Measured by Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS)
We present the first state-selective, scattering-angle-dependent cross sections for the reaction 0.25-1 MeV He2+ + He → He1+ + He1+. The experiment was performed, using a new generation of recoil ion momentum spectroscopy, which enabled us to determine the three momentum components and the charge state of the recoil ion simultaneously. An absolute momentum resolution of ±0.13 a.u. for the longitudinal and ±0.02 a.u. for the transverse momentum component has been achieved, which is equivalent to a resolution in projectile energy loss of ±5.6 eV and an uncertainty of the projectile scattering angle of better than ±1 μrad.
V. Mergel and R. Dorner and J. H. Ullrich and O. Jagutzki and S. Lencinas and S. Nuttgens and L. Spielberger and M. Unverzagt and C. L. Cocke and R. E. Olson and M. Schulz and U. Buck and H. Schmidt-Bocking, "He2+ on He: State-Selective, Scattering-Angle-Dependent Capture Cross Sections Measured by Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS)," Nuclear Inst. and Methods in Physics Research, B, vol. 98, no. 1-4, pp. 593-596, Elsevier, May 1995.
The definitive version is available at http://dx.doi.org/10.1016/0168-583X(95)00019-4
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