2014 Dans cet article, nous présentons une formule analytique semi-empirique à deux paramètres libres pour la section efficace électronique d'ionisation directe de l'état fondamental des atomes de zinc et de cadmium. Les résultats obtenus se trouvent dans la limite des erreurs des données expérimentales. Les autres processus d'ionisation (ionisation multiple, autoionisation) ont été négligés.Abstract. 2014 In this paper, a semi-empirical analytical formula with two free parameters is given for the representation the ionisation cross-section by electron-impact for the zinc and cadmium atoms from the ground state. The results are within the error bars of the experimental results. Other ionization processes (multiple ionisation, autoionization) are not taken into account.
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