Electro-Magnetic Dipole Properties of The Even-Even 160Gd Nucleus in The Spectroscopic Region

In this study result of calculations using rotational, translational and Galilean invariant quasiparticle random-phase approximation is presented for the low lying dipole excitations in the even-even 60Gd nucleus. To make detail structure analysis for electric and magnetic dipole states, calculations carried out for both ΔK = 1 and ΔK = 0 branches. The analysis shows that almost all transitions with ΔK = 1 are magnetic character in 2.4 divide 4 MeV energy interval. However, the calculations indicate the presence of a few prominent negative parity Kπ = 1 states in the investigated energy interval, one of them with rather high E1 strength B(E1) = 7.1·10-3 e2 fm2 at energy 3.2 MeV. Calculated M1 dipole strength of the scissors mode Kπ = 1+ excitations clustered in two groups around 2.7 and 3.3 MeV. A similar situation arises for the experimentally obtained states two bumps around ωi = 2.7 MeV and ωi = 3.3 MeV. It has been shown that main part of spin-1 states, observed at energy 2.4 divide 4 MeV in 160Gd may be attributed to have M1 character and may be interpreted as main fragments of the scissors mode. However, it is apparent that the experimental data exceeds the calculation results for the summed B(M1) by a factor of 1.13 for M1 transitions.