Magnetic properties of rotational bands in¹⁶⁰Dyand^170–174Ybisotopes

Abstract

Abstract. In this work, non -adiabatic effects manifested in the magnetic properties of lowlying states of even-even deformed nuclei are studied. A simple phenomenological model which takes into account the Coriolis mixing of states of the ground and K π = 2 bands are calculated and compared with the experimental data. Decreases of g R -factor with increasing angular momentum I have been discussed.That these is an obvious inverse relation between g R -factor and angular momentum I of the ground band states. This has been explained by a mixing ground and K π = 1 + bands which have a strong B(M 1) to ground state. IntroductionThe interest to investigation in the properties of deformed nuclei, especially increased in recent years with the opening of a new collective isovector magnetic dipole mode [1,2].The measured values of energies of the excited states such as modes indicate that they are not so high in the excitation spectrum, and consideration of mixing the isovector magnetic modes with low-lying exciting states can lead to interesting physical phenomena [3,4].Using 85 Kr ions with energy of 350 M eV by Coulomb excitation has been studied ground band state in the flesh to the spin I = 16h isotopes 160 Dy and 170,174 Y b in paper [5]. Nonadiabaticity of magnetic characteristics of low-spin states of ground bands has been observed. It is shown that, with an increase of angular momentum I, g R -factor decreases in these three nuclei.The nuclei 170,172,174 Y b are among the most well studied. These isotopes are studied experimentally in a number of ways: such as radioactive decay of 170,172,174 Lu, and also different nuclear reactions. In the study of nuclear reactions of bands with the small K were supplemented bands with high spin [6]-[8]. In these isotopes detected many 1 + states and also bands with K π = 0 + n , 2 + n , and some of these bands include the levels with rather high spins.