http://www.cnr.it/ontology/cnr/individuo/prodotto/ID303887

State-to-state electron impact cross sections for BeH+ molecular ions in ITER-like fusion edge plasmas with Be walls (Articolo in rivista)

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State-to-state electron impact cross sections for BeH+ molecular ions in ITER-like fusion edge plasmas with Be walls (Articolo in rivista) (literal)

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Celiberto, Roberto; Janev, Ratko K.; Reiter, Detlev (2012)
State-to-state electron impact cross sections for BeH+ molecular ions in ITER-like fusion edge plasmas with Be walls
in Plasma physics and controlled fusion (Print)
(literal)

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Politecnico di Bari; Consiglio Nazionale delle Ricerche; Macedonian Academy of Sciences and Arts; Forschungszentrum Jülich (FZJ) (literal)

Titolo

State-to-state electron impact cross sections for BeH+ molecular ions in ITER-like fusion edge plasmas with Be walls (literal)

Abstract

BeH+ molecules will be an important intermediary species present in fusion plasmas with Be walls (e.g. JET, ITER), both for impurity transport and spectroscopic studies. To enable such analyses the electron-impact-induced excitations X 1?+(vi) -> A 1?+(vf) and X 1?+(vi) -> B 1?(vf) in BeH+(vi) molecular ion, occurring between the vi and vf vibrational levels of different electronic states (vibro-electronic transitions), have been studied using the Coulomb-Born approximation. The cross sections and rate coefficients for these transitions have been calculated in a broad energy and temperature range, respectively. Accurate analytic fit expressions have been derived for the cross sections and rate coefficients for the vi = vf = 0 case of considered electronic transitions that have correct asymptotic limits. It has been demonstrated that the cross sections and rate coefficients for vi, vf > 0 transitions satisfy approximate (to within 10%) scaling relationships that involve the transition energies and matrix elements of dipole transition moments only. (literal)

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