Abstract

Isotope shift Δ T( 156Gd– 160Gd) of the even-parity energy levels of 4f 86s 2 and 4f 76s 26p configurations of neutral gadolinium atoms (Gd I) have been reevaluated using the level isotope shift (Δ T) of two odd-parity levels reported recently. Earlier the isotope shifts of these even-parity energy levels were evaluated using empirical relation. Our extensive isotope shift data has been used for the reevaluation of Δ T values of these low even-parity energy levels which have been utilised for revision of the Δ T values of high-lying odd-parity energy levels of Gd I.

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