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The previously reported levels assigned to 151,152,153Pr have recently beencalled into question regarding their mass assignment. The above questionedlevel assignments are clarified by measuring g-transitions tagged with A and Zin an in-beam experiment in addition to the measurements from 252Cf spontaneousfission (SF) and establish new spectroscopic information from $N=84$ to $N=94$in the Pr isotopic chain. The isotopic chain 143-153Pr has been studied fromthe spontaneous fission of 252Cf by using Gammasphere and also from themeasurement of the prompt g-rays in coincidence with isotopically-identifiedfission fragments using VAMOS++ and EXOGAM at GANIL. The latter were producedusing 238U beams on a 9Be target at energies around the Coulomb barrier. Theg-g-g-g data from 252Cf (SF) and those from the GANIL in-beam A- and Z-gatedspectra were combined to unambiguously assign the various transitions andlevels in 151,152,153Pr and other isotopes. New transitions and bands in145,147,148,149,150Pr were identified by using g-g-g and g-g-g-g coincidencesand A and Z gated g-g spectra. The transitions and levels previously assignedto 151,153Pr have been confirmed by the (A,Z) gated spectra. The transitionspreviously assigned to 152Pr are now assigned to 151Pr on the basis of the(A,Z) gated spectra. Two new bands with 20 new transitions in 152Pr and one newband with 7 new transitions in 153Pr are identified from the g-g-g-gcoincidence spectra and the (A,Z) gated spectrum. In addition, new g-rays arealso reported in 143-146Pr. New levels of 145,147-153Pr have been established,reliable mass assignments of the levels in 151,152,153Pr have been reported andnew transitions have been identified in 143-146Pr showing the new avenues thatare opened by combining the two experimental approaches.

Identification of new transitions and mass assignments of levels in $^{143-153}$Pr