Experimental separation of electron-electron and electron-nuclear contributions to ionization of fast hydrogenlike ions colliding with He

Cold Target Recoil Ion Momentum Spectroscopy

“…The projectile electron can either be emitted by an interaction with the target nucleus (ne) or with one of the target electrons (ee) [202}211]. With the use of COLTRIMS a break through in this investigations has been achieved since the measurement of the recoil ion momentum allows an experimental separation of the two mechanisms [66,88,89,212]. The explanation for this is similar to the case of transfer ionization discussed in Section 4.2.2.…”

“…Fig. 4 reported by Wu and coworkers [88,89] shows strong forward emission of the recoil ion in an electron loss reaction. COLTRIMS requires the production of an ion, thus projectile ionization can only be investigated if it is accompanied by simultaneous target ionization.…”

“…Thus, COLTRIMS is the only experimental approach allowing to separate this dominant channel. DoK rner and coworkers [111] found a ratio of about 16$3% for double [243,244], dashed line theoretical estimate from [89], see text (from [87]). …”

“…All grids and the inside of the drift tube are germanium coated. Instead of the carbon "ber in other setups wires or rings of thin sheet metal, which are connected by resistors, have been used successfully [64,89,109,110]. Fig.…”

Search for isotope effects in projectile and target ionization in swiftHe+onH2orD2Trinter1, Waitz2, Schöffler3 et al. 2014Phys. Rev. ASelf Cite2010View full textAdd to dashboardCite

“…In our experiment we use the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) technique [19][20][21] to examine the electron loss process [22][23][24][25] yielding an acceptance angle of 4π for ions up to 5 a.u. momentum.…”