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The residual p-n interaction in doubly odd deformed nuclei is examined in the framework of the unified model. Extensive experimental information about the Gallagher-Moszkowski splitting energies and Newby shifts in the rare-earth and actinide regions is used to deduce empirical parameters of the residual p-n interaction. Delta interaction and Gaussian-shape radial potential are assumed, Empirical p-n parameters are discussed and compared with previously deduced parameters. For the first time, errors in the parameters are estimated and special attention is paid to parameter significance.

An iron-free P spectrometer with preand post-acceleration of electrons was used to study P branches and conversion electrons at very low energies in the P decay of Ra. Results of conversionelectron and p-ray spectroscopy are analyzed using P selection rules and two-quasiparticle-rotor model considerations. A tentative Ac level scheme, including model-dependent spin-parity and configuration assignments consistent with the available data, is presented.PACS number(s): 27.90.+b, 21.60.Ev, 23.40.Hc