Abstract
Praseodymium (Pr) belongs to Lanthanide group; it has an unfilled f shell. Atomic Praseodymium is very rich in fine levels. Atomic structures both Pr I and Pr II have still not been completely classified. Few researchers have studied Pr fine structures theoretically. The 4f25d2 configuration of singly ionized Praseodymium (Pr II) has been investigated and term values, fine levels angular momenta and coupled wave functions arising from this configuration are being reported in this paper. To calculate the term values and wave functions, Russell-Saunders (L-S) and coefficient of fractional parentage methods have been used respectively. Spectroscopic terms for 4f25d2 configuration are 187, 457 J values of possible fine levels and 106 wave functions of given configuration have also been found. Wavefunctions could be used to calculate the energies of terms, transition probabilities, etc.
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