Ionization balance for optically thin plasmas: Rate coefficients for all atoms and ions of the elements H to Ni^*

¹ Dipartimento di Fisica, Università di Roma "Tor Vergata”, via della Ricerca Scientifica 1, I-00133 Roma, Italy
² Associazione EURATOM-ENEA sulla Fusione, C.R. Frascati, CP 65-00044 Frascati Roma, Italy
³ Osservatorio Astronomico di Roma, via dell'Osservatorio, I-00040 Monteporzio, Italy

Send offprint request to: P. Mazzotta

Received: 5 February 1998
Accepted: 22 June 1998

Abstract

We present in this paper new and updated calculations of the ionization equilibrium for all the elements from H to Ni. We collected for these elements all the data available in the literature for the ionization and radiative plus dielectronic recombination rates. In particular, the dielectronic rates have been fitted with a single formula and the related coefficients are tabulated. Our results are compared with previous works.