The 2.0 version of the CHIANTI database includes energy levels, radiative transition probabilities and collision strengths for a large number of ions belonging to the so-called Minor Elements: Na, P, Cl, K, Ti, Cr, Mn, Co, Zn. Lines from these ions have often been observed in the past both in solar and stellar spectra, and they can be useful for plasma diagnostics.
In the recent past a careful review of the existing Minor Ions data in the literature has been carried out by Landi & Landini (1998), including data for the Minor Elements belonging to the lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, sodium and magnesium isoelectronic sequences.
In the 2.0 version of the CHIANTI database we include the Minor Ions database resulting from Landi & Landini (1998), where details on the atomic data used can be found. The list of the ions included in the CHIANTI database is given in Tables 1 and 2.
In order to calculate line emissivities with CHIANTI, ionization equilibrium populations are necessary, and we have adopted the Landini & Monsignori Fossi (1991) results. A file containing the Landini & Monsignori Fossi (1991) ionization equilibrium calculations is distributed with version 2.0 of the CHIANTI database.
A new calculation of ionization balance for all elements from helium to nickel has been performed by Mazzotta et al. (1998). These dataset will be inserted into CHIANTI as soon as it will be available.
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