Simple model for the quenching of the moments of inertia due to pairing correlations in rigidly deformed rotational bands

2004 ◽  
Vol 69 (5) ◽  
Author(s):  
P. Quentin ◽  
H. Lafchiev ◽  
D. Samsœn ◽  
I. N. Mikhailov
Keyword(s):  
Simple Model ◽  
Moments Of Inertia ◽  
Rotational Bands ◽  
Pairing Correlations

Pairing correlations in the superdeformed rotational bands: The frequency-deformation scaling

1987 ◽  
Vol 196 (4) ◽  
pp. 404-408 ◽  
Author(s):  
W. Nazarewicz ◽  
Z. Szymański ◽  
J. Dudek
Keyword(s):  
Rotational Bands ◽  
Pairing Correlations

PHENOMENOLOGICAL ANALYSIS OF THE OBLATE-PROLATE SYMMETRY BREAKING IN TRIAXIAL DEFORMATION DYNAMICS

2010 ◽  
Vol 25 (21n23) ◽  
pp. 2018-2019
Author(s):  
KOICHI SATO ◽  
NOBUO HINOHARA ◽  
TAKASHI NAKATSUKASA ◽  
MASAYUKI MATSUO
Keyword(s):  
Simple Model ◽  
Symmetry Breaking ◽  
Phenomenological Analysis ◽  
Numerical Results ◽  
Shape Coexistence ◽  
Triaxial Deformation ◽  
Moments Of Inertia ◽  
Prolate Shape ◽  
Deformation Dynamics ◽  
Collective Hamiltonian

From a viewpoint of oblate-prolate symmetry and its breaking, we propose a simple model based on the quadrupole collective Hamiltonian to study dynamics of triaxial deformation in shape coexistence phenomena. The numerical results suggest that the oblate-prolate symmetry breaking in the rotational moments of inertia can play an important role for the oblate-prolate shape coexistence as well as that in the collective potential.

scholarly journals Form Factors for Rotational Levels in 12C, 16O, 28Si and 40 Ca

1975 ◽  
Vol 30 (8) ◽  
pp. 1018-1022 ◽  
Author(s):  
K. J. Lezuo
Keyword(s):  
Experimental Data ◽  
Simple Model ◽  
Excellent Agreement ◽  
Ground State ◽  
Transition Probabilities ◽  
Form Factors ◽  
Rotational Bands ◽  
Rotator Model ◽  
Two Parameters ◽  
Surface Thickness

Abstract We support the proposed ground state rotational bands in 12 C, 16 O, 28 Si and 40 Ca by calculating the form factors for the electro-excitation within a simple model. The model introduces two parameters for the size and the surface thickness of these nuclei and allows for the prediction of the transition probabilities and form factors within the rotator model. The model unambiguously predicts the sequence of rotational levels 0+, 3+ , 4+ ... for 16 O and 40 Ca, and 0 + , 2 + , 4 + ... for 12 C and 28 Si in agreement with the experiment. The comparison of the calculated form factors with the experimental data shows excellent agreement in the cases 28 Si and 40 Ca and is less satisfactory in the cases 12 C and 16 O.

scholarly journals Study of the high rotational bands of heavy nuclei (A=190) by An approach keeping the number of particles: دراسة منطقة الدوران العالية للانوية الثقيلة(A » 190) باستعمال الحفاظ على عدد الجسيمات

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Hamel Fatima zohra, Djamel Eddine Medjadi
Keyword(s):  
Experimental Data ◽  
Mass Region ◽  
Collective Modes ◽  
Heavy Nuclei ◽  
Moments Of Inertia ◽  
Deformed Nuclei ◽  
Rotational Bands ◽  
Hartree Fock ◽  
Rotational Part ◽  
Number Of Particles

  Current study propuse to treat on first all what is mentioned the these statment which role essentially in two steps .First, we start with a presentation of the formalism of the approach HTDA (Higher Tamm Dancoff approximation).This approximation is based on the excitations particle-hole permits the conservation of a number of particles in a middle field. A special attention will be drifted on the HTDA code with triaxial symmetry that we will extend in a way that allows us to include in the Hamiltonian a rotational part to process the collective modes of rotation in the deformed nuclei. Secondly, the Cranking version of this formalism (Cr.HTDA) Will allow us to calculate the moments of inertia of the super-distorted bands of nuclei in the mass region A ~190.These will be compared to the experimental data and with those of the Cranking version of the approach Hartree- Fock- Bogoliubov. This work, will offer an interesting perspectives, calling for certain ameliorations or extensions of the HTDA code.    

Structure of Superdeformed Rotational Bands in A ~ 150 Mass Region

2015 ◽  
Vol 7 (2) ◽  
pp. 1414-1427 ◽  
Author(s):  
Mahmoud Kotb ◽  
A.M. Khalaf ◽  
F.A. Altalhi
Keyword(s):  
Mass Region ◽  
Rotational Frequency ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Moments Of Inertia ◽  
Transition Energies ◽  
Rotational Bands ◽  
Yrast Bands ◽  
Best Fit ◽  
Theory And Experiment

The structure of superdeformed rotational bands (SDRB's) in A ~ 150 mass region are studied by using the Harris three – parameter expansion and the incremental alignment. The bandhead spins Io have been determined with best fit procedure in order to obtain a minimum root mean square deviation between the calculated and the experimental dynamical moments of inertia. The kinematic moment of inertia has been calculated as a function of rotational frequency and compared to the corresponding experimental ones by assuming three spin values Io - 2 , Io , Io + 2. The transition energies and the variation of the moments of inertia as a function of rotational frequency have been calculated. The agreement between theory and experiment are excellent. The identical bands of SDRB's with ΔI = 2 staggering in 148Gd (SD6) and 149Gd (SD1) are investigated. Also the presence of ΔI = 2 staggering effect in the yrast bands of 147Eu and 150Tb has been examined.

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