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Gusev, Alexander A.; Solov’ev, Evgeni A.; Vinitsky, Sergue I.

ARSENY: a program for computing inelastic transitions via hidden crossings in one-electron atomic ion-ion collisions with classical description of nuclear motion. (English) Zbl 1521.81425

Comput. Phys. Commun. 286, Article ID 108662, 19 p. (2023).
Summary: The ARSENY program is intended to compute cross-sections of inelastic transitions via hidden crossings upon slow one-electron atomic ion-ion collisions using the approximation of classical description of nuclear motion in the collision energy region \(E < 20\) KeV/nucleon. Particular attention is paid to the calculation of the analytical properties of adiabatic potential energy curves of the two-center Coulomb problem for complex values of the internuclear distance. Complex branch points and hidden crossings are calculated and their significance for the dynamics of one-electron collisional systems is revealed. Benchmark calculations of cross sections for charge exchange, excitation, and ionization in slow \(\mathrm{He}^{2+}+\mathrm{H}(1s)\) collisions are presented and compared with experimental data.

MSC:

81U35 Inelastic and multichannel quantum scattering
81V45 Atomic physics
70F35 Collision of rigid or pseudo-rigid bodies
78A35 Motion of charged particles
81Q12 Nonselfadjoint operator theory in quantum theory including creation and destruction operators
70H11 Adiabatic invariants for problems in Hamiltonian and Lagrangian mechanics
81-04 Software, source code, etc. for problems pertaining to quantum theory

Keywords:

two-center Coulomb problem; complex values of internuclear distance; adiabatic potential energy curves; complex branch points; hidden avoided crossings; cross sections; charge exchange; excitation; ionization; slow one-electron atomic ion-ion collisions

Software:

ARSENY
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Full Text: DOI

References:

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