The Fifth Conference “ Nuclear Science and Its Application”, 14-17 October 2008
CALCULATION OF THE SPECTROSCOPIC CHARACTERISTICS OFmEr
AND 179Re NUCLEI WITHIN NON-ADIABATIC APPROACH
M. J. ERMAMATOV
Institute o f Nuclear Physics, Ulughbek, Tashkent 100214, Uzbekistan
Low-lying excited states of nuclei are divided into single-particle and collective states in adiabatic approximation. The latter in turn can be divided into p - and y -vibrational levels and rotational levels. The above approximation is applicable to even-even nuclei, because their spectrum of the single-particle excitations is separated from the ground state by a gap of 1 to 2 MeV. In odd nuclei, the energy of single-particle excitations is on the same order of magnitude as the rotational energy and the energy of vibrations o f the nuclear surface; therefore, the separation o f single-particle excitations from the total excitation of a nucleus is not well justified.
An odd-mass nucleus is often considered as a system consisting of a core and an external nucleon moving in its field. Interplay between collective and single-particle states which is taken into account, is important since the excited states with high spins are included in the present consideration.
Recently we have developed non-adiabatic approach to the study of deformable triaxial odd nuclei using different types of potential for the longitudinal vibrations of the nuclear surface [1-4]. Here we apply this approach to 171Er and 179Re odd nuclei. Calculated values o f excited states energies for these nuclei, E2-transition probabilities for these nuclei are compared with existing
Section II. Basic Problems O f Nuclear Physics
The Fifth Conference “ Nuclear Science and Its Application”, 14-17 October 2008
experimental data. Predicted values of quadrupole moments and E2-transition probabilities are also presented for the above nuclei.
[1] Sh. Sharipov and M. J. Ermamatov, Int. J. Mod. Phys, 12 (2003) 683 [2] Sh. Sharipov and M. J. Ermamatov, Int. J. Mod. Phys, 12 (2003) 41
[3] Sh. Sharipov, M. J. Ermamatov and Bayimbetova, Int. J. Mod. Phys. E 15 (2006) 719. [4] Sh. Sharipov and M. J. Ermamatov, Phys. Atomic Nucl 71 (2008) 215.
