Classical description of H(1s) and H∗ (n = 2) for cross-section calculations relevant to charge-exchange diagnostics

N. D. CARIATORE; S. OTRANTO; R. E. OLSON

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

AMER PHYSICAL SOC

Lugar: New York; Año: 2015 vol. 91 p. 427091 - 4270910

1050-2947

In this work, we introduce a classical trajectory Monte Carlo (CTMC) methodology, specially conceived toprovide a more accurate representation of charge-exchange processes between highly charged ions and H(1s)and H∗ (n = 2). These processes are of particular relevance in power fusion reactor programs, for which charge-exchange spectroscopy has become a useful plasma diagnostics tool. To test the methodology, electron-capturereactions from these targets by C6+ , N7+ , and O8+ are studied at impact energies in the 10?150 keV/amu range.State-selective cross sections are contrasted with those predicted by the standard microcanonical formulationof the CTMC method, the CTMC method with an energy variation of initial binding energies that produces animproved radial electron density, and the atomic orbital close-coupling method. The present results are found into be much better agreement with the quantum-mechanical results than the results of former formulations of theCTMC method.