The Investigation of Electromagnetic Transition Probabilities of Gadolinium Isotopes with the IBFM-1 Model

We investigate the energy levels and the electric quadrupole transition probabilities B(E2;I(i) -> I(f)) and gamma-ray E2/M1 mixing ratios for selected transitions of (152 similar to 156)Gd. The results are in reasonably good agreement with the previous experimental values. The negative spin states of the even-odd (153)Gd isotope were studied within the framework of the interacting boson-fermion model (IBFM-1). The single fermion is assumed to be in one of the lh(9/2), 3p(3/2), 2f(5/2), and 3p(1/2) single particle orbits. It was found that the calculated negative spin state energy spectra of the even-odd (153)Gd isotope agrees quite well with the experimental data. The observed B(E2) values were also calculated and compared with the experimental data.