Antiproton and proton collisions with the alkali metal atoms Li, Na, and K

Abstract

Single-electron ionization and excitation cross sections as well as cross sections for excitation into the first excited p state of the alkali metal atoms Li(2s), Na(3s) and K(4s) colliding with antiprotons and protons were calculated using a time-dependent channel-coupling approach. For antiprotons an impact-energy range from 0.25 to 1000 keV and for protons from 2 to 1000 keV was considered. The target atoms are treated as effective one-electron systems using a model potential. The results are compared with theoretical and experimental data from literature and calculated cross sections for antiproton-hydrogen collisions. For proton collisions a good overall agreement is found which confirms the present numerical approach, whereas discrepancies are found between the present antiproton cross sections and those calculated by Stary et al., J.Phys.B 23, 263 (1990).

Cited by in corpus (8)

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• Antiproton collisions with molecular hydrogen
• Full two-electron calculations of antiproton collisions with molecular hydrogen
• Stopping power of antiprotons in H, H2, and He targets
• Collisions of antiprotons with hydrogen molecular ions
• Collisions of low-energy antiprotons with molecular hydrogen: ionization, excitation and stopping power
• Interaction of antiprotons with Rb atoms and a comparison of antiproton stopping powers of the atoms H, Li, Na, K, and Rb