Dissociation des ions h2+ et h3+ dans un plasma de lithium

An evaporation model for H2-clusters interacting with electrons and ions in a plasma

“…Therefore, the maximum energy stored into excitation of molecular vibrational levels, and not affecting the solid-lattice stability is given by This formula is used to fix the /3-value used in relation (2. 11), valid for secondary electrons which recombine inside the cluster [10]. Experimental supports of the hypothesis that the energy of the secondary electrons is not stored in the solid lattice are given in Refs [10][11][12][13], As the rotational energies of H 2 are in the range 5xlO" 2 -0.…”

“…11), valid for secondary electrons which recombine inside the cluster [10]. Experimental supports of the hypothesis that the energy of the secondary electrons is not stored in the solid lattice are given in Refs [10][11][12][13], As the rotational energies of H 2 are in the range 5xlO" 2 -0. 1 eV, by assuming that almost all cluster molecules can be excited, we find that rotational levels can absorb less energy than vibrational ones (formula 2.…”

“…From Ref. [10] we have (2.17) where o^ is the ionization cross-section of H 2 as due to the primary particles considered and F the secondary-electron escaping probability. The escaping probability F(N,W S0 ), which has been computed in Ref.…”

“…The escaping probability F(N,W S0 ), which has been computed in Ref. [10] as a function of the secondary-electron range i% and the cluster radius R , can be approximated by F = 0.75 For j ? / R c g 2, F is equal to unity.…”

“…The dependence of W so , the initial mean energy of the ejected electrons, on the energy Vô f the primary electrons has been given in Ref. [10].…”