scholarly journals Dipole States in 86Sr, 88Sr and 90Zr

1974 ◽  
Vol 27 (1) ◽  
pp. 21 ◽  
Author(s):  
RP Robertson
Keyword(s):  
Shell Model ◽  
Quantum Number ◽  
Ground State ◽  
Residual Interaction ◽  
Ground State Wavefunction ◽  
Model Method ◽  
Good Quantum Number ◽  
Realistic Force

A shell model method for calculating dipole states in N > Z even nuclei is discussed. By assuming isospin to be a good quantum number, the spectrum resolves into two classes of states differing in isospin. Applications of this model to 88Sr and 90Zr essentially differ from previous calculations by the use of a new realistic force in the residual interaction. Dipole states in 86Sr are also investigated along with the effect of correlating the ground state wavefunction

PARTICLE-NUMBER CONSERVING TREATMENT FOR THE GROUND STATE BANDS IN EVEN-EVEN TRANSFERMIUM NUCLEI

2008 ◽  
Vol 17 (supp01) ◽  
pp. 208-218 ◽  
Author(s):  
XIAO-TAO HE ◽  
ZHONG-ZHOU REN
Keyword(s):  
Angular Momentum ◽  
Shell Model ◽  
Single Particle ◽  
Ground State ◽  
Particle Number ◽  
Rotational Frequency ◽  
Moment Of Inertia ◽  
Particle Level ◽  
Pairing Correlations ◽  
Band Crossing

The ground state bands observed in even-even transfermium nuclei 250 Fm and 252,254 No are investigated by the cranked shell model with the particle-number conserving treatment for the monopole and quadrupole pairing correlations. The experimental variations of the kinematic moment of inertia with rotational frequency are reproduced very well in our calculation. Our results show bankbendings of [Formula: see text] at ħω ≈ 0.275 and 0.300 MeV in 252 No and 254 No , respectively. The detailed information about the contribution to alignment from each cranked single particle level exhibits that the backbending is mainly due to the rapidly aligned angular momentum of proton 1j15/2 [770]1/2 pairs and neutron 2h11/2 [761]3/2, 1j15/2 [734]9/2 pairs the band crossing.

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