Print ISSN: 1812-125X

Online ISSN: 2664-2530

Keywords : even-even


Changes in properties of Ba132-126 even-even isotopes

Zeena Hameed Salih; Imad Mamdooh Ahmad

JOURNAL OF EDUCATION AND SCIENCE, 2013, Volume 26, Issue 3, Pages 95-107
DOI: 10.33899/edusj.2013.89901

Abstract
The energy of the first exited state , and , , and for 132-126Ba even-even isotopes are compared with the standard values for the three limits, the vibration U(5), gamma-soft O(6) and the rotational SU(3). The back-bending curve and the relation between as a function of ( E-GOS) are drawn for these isotopes to have more information about their properties. Calculation of the energy of different states along the yrast region has been done using the standard relations for each limit, U(5), O(6) and SU(3) and a comparison with the experimental data show that they have the O(6) property for low-lying states and a O(6) – U(5) property for the high states, except for 132 Ba that shows a O(6) – U(5) property for all these states with different values of parameters along the yrast region. The interacting boson model IBM-1 has been used to calculate the energy of different states along the yrast region applying a suitable limit for each isotopes. A program with MATLAB 6.5 has been built for this purpose. Agood agreement with the experimental data was obtained.

Properties of the yrast levels of 78-82Sr even-even isotops

Emad Mamdouh; Wafaa Mohammad Najeebb

JOURNAL OF EDUCATION AND SCIENCE, 2010, Volume 23, Issue 2, Pages 104-119
DOI: 10.33899/edusj.2010.58249

Abstract:
The properties of the yrast levels of 78-82Sr even-even isotopes have been studied. The method of gamma energy over spin (E-GOS) has been used to analyze the energy levels of these isotopes which shows that the two isotopes 78 Sr and 80Sr lie in the γ-unstable, O(6), limit, but 82Sr isotope lies in the transition region (SU(5)→SU(3)).
The interacting boson model IBM-1 has been used to calculate the energy levels for these three isotopes each for the limit it lies and a comparision with the experimental data is done and shows a good agreement.
The backbending in the energy levels for 80Sr and 82Sr are observed but not for 78Sr.