Розрахунок iраст-смуг з позитивною парнiстю для ядер 190−198Hg

• Main Authors: Hussain, K. A., Mohsin, M. K., Sharrad, F. I.
• Format: Article
• Language: English
• Published: Publishing house "Academperiodika" 2018
• Subjects: IBM-1; B(E2) values; energy levels; potential energy; -
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018640

The Interacting Boson Model (IBM-1) has been used to calculate the low-lying positive parity yrast bands in 190−198Hg nuclei. The systematic yrast level and electric reduced transition probabilities B(E2)↓ of those nuclei are calculated and compared with the available experimental data. The ratio of the excitation energies of first 4+ and first 2+ excited states, R4/2, is also studied for the O(6) symmetry for these nuclei. Furthermore, as a measure to quantify the evolution, we have studied systematically the yrast level R = EL+1/E2+1 of some of the low-lying quadrupole collective states in comparison to the available experimental data. Moreover, we have studied the systematic B(E2) values, and the moment of inertia as a function of the squared rotational energy for even proton Z = 80 and 110 < N < 118 nuclei indicates the disappearance of back-bending properties. The results of this calculation are in good agreement with the corresponding available experimental data. The analytic IBM-1 calculation of the yrast level and B(E2) values of even-even Hg nuclei is performed in the framework of O(6) symmetry. The contour plot of the potential energy surfaces shows that the nuclei are deformed and have y-unstable-like characters.