In this paper the mathematical expression which is given by Bohr for the moment of inertia of eveneven nuclei on the basis of the hydrodynamical model is modified. This modification is on the kinetic energy of the surface oscillations including the second and third terms of $R-$ expansion as well as the first term which was already carried out by Bohr. Therefore, this work can be considered
An approach based on the idea that the spinning nucleus being stretched out along the symmetry axis under the influence of some of centrifugal force has been proposed. The stretching in this work is treated within the framework of quantum mechanics rather than classical mechanics which had been used by Diamond Stephens and Swiatecki. Our approach led to a new formula that describes the dependence of the moment of inertia on the angular momentum. This formula is applied for the calculation of rotational ground state bands of eveneven nuclei in the atomic mass range 150 A 190 and that having energy ratios in the range between 4 2 2.9 E / E 3.33 . The results show an overall agreement with the experimental data up to high level energies. There are a small and systematic deviation appears at 12 I . This deviation increases with the increasing in I and also differs from one nucleus to another.
Abstract. The non-adiabatic effects which is manifested in the electric properties of low-lying states of even-even deformed nuclei are studied. A simple phenomenological model which takes into account the Coriolis mixing of K π = 0 IntroductionDespite the fact that the structure of deformed nuclei and nature of low excited levels have been substantially studies over more than four decades, this still occupies a central part of today's research Refs.[1]- [3].The isotopes of Yb is the deformed nuclei in rare-earth region and the spherical nuclei near Z = 70. For well deformed nuclei the states associated with ground state rotation produce regular sequences which dominate the yrast line. The nuclei 170,172,174 Y b have been well studied. In highspin spectroscopy studies of rare-earth nuclei, the isotopes of ytterbium have been a central focus for many experiments, and a large body of data has been established [4].It is important to note that these are investigated in a number of ways such as radioactive decay of 170,172,174 Lu, and different nuclear reactions. In these isotopes, many 1 + states and K π = 0 + , 2 + bands have been observed.Numerous conducted experiments on defining spectroscopic characteristics of low-lying exciting states, particular K π = 1 + in deformed nuclei [5], have motivated the further theoretical investigations. In this case, investigations influence of K π = 1 + states to the properties of lowlying levels is actual.In the present paper analyzing properties of positive parity low-lying state in the transuranium nuclei, within the phenomenological model
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