Doubly differential cross sections for ionization of lithium atom by protons and O8+ ions

Abstract

We consider single ionization of lithium atom in collisions with p and O 8+ projectiles. Doubly differential cross sections for ionization are calculated within a relativistic non-perturbative approach. Comparisons with the recent measurements and theoretical predictions are made.

Fully differential cross sections for ionization of Li(2s) and Li(2p) by 16 MeV Li2+ impact

“…The FDCS of 2p y always vanishes at f e =0°and shows a doublepeak structure. Therefore, the FDCSs of 2p ±1 show double peaks when FDCS of 2p y predominates over the FDCS of 2p x , see equations (9) and (11). The double peak seems to occur, if…”

“…The method was first applied to investigate ionization of the 2s and 2p states of the lithium atom. The doubly differential cross sections for the Li targets with respect to the electron ejection energy and the transverse momentum transfer were measured for 24 MeV O 8+ and 6 MeV proton impacts [6], which were analyzed by theoretical calculations [7][8][9][10][11]. Measurements for the FDCS were also reported for the 24 MeV O 8+ and 16 MeV Li 2+ impacts [12][13][14][15].…”

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

“…For the case of heavy projectiles, calculations were presented for targets of helium [ 32 ] and lithium atoms [ 33 ], as well as for water molecules [ 34 ], and neutral atoms and hydrogen molecules [ 35 ] collisions. Differential cross sections for charge-exchange and single and double electronic emission in collisions of protons with He-atoms at intermediate impact energies were theoretically evaluated by the classical trajectory Monte Carlo methods [ 32 ].…”

“…The role of the electron–electron correlation effects in double ionization processes was analysed by inspecting the angular and energetic dependence of the electronic emission spectra at different impact energies. Bondarev et al considered the single ionization of lithium atoms in collisions with p and O projectiles [ 33 ]. Doubly differential cross sections for ionization were reported within a relativistic non-perturbative approach and compared with the recent measurements.…”