New theoretical results for2νββdecay within a fully renormalized proton-neutron random-phase approximation approach with the gauge symmetry restored

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
C. M. Raduta ◽  
A. A. Raduta ◽  
I. I. Ursu
Keyword(s):  
Gauge Symmetry ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Approximation Approach ◽  
Theoretical Results

Phase diagram of charged dumbbells: A random phase approximation approach

2004 ◽  
Vol 70 (2) ◽  
Author(s):  
Alexander Kudlay ◽  
Alexander V. Ermoshkin ◽  
Monica Olvera de la Cruz
Keyword(s):  
Phase Diagram ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Approximation Approach

scholarly journals Elastic scattering of low-energy positron by atom

2005 ◽  
Vol 3 (2) ◽  
pp. 141-149 ◽  
Author(s):  
M.R. Nikolic ◽  
Aleksandar Tancic
Keyword(s):  
Elastic Scattering ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Dyson Equation ◽  
Low Energy ◽  
Phase Approximation ◽  
Correlation Effects ◽  
Slow Positron ◽  
Theoretical Results

In this paper, we present our calculation for the elastic scattering of the slow positron from atoms. The calculation is performed for He, Ne, Xe and Kr. In the calculations we used Random phase approximation. By slowing Dyson equation we take into account the correlation effects. Our results are consistent with experimental and other theoretical results.

scholarly journals Optical potential approach to the slow positron scattering from helium atom

2002 ◽  
Vol 2 (4) ◽  
pp. 183-188 ◽  
Author(s):  
Aleksandar Tancic ◽  
M.R. Nikolic
Keyword(s):  
Elastic Scattering ◽  
Random Phase Approximation ◽  
Optical Potential ◽  
Random Phase ◽  
Low Energy ◽  
Phase Approximation ◽  
Positron Scattering ◽  
Slow Positron ◽  
Experimental Values ◽  
Theoretical Results

We have extended our previous calculations to include the contribution of the random-phase approximation (RPA) (improved) optical potential to the low energy elastic scattering in the electron+He system. Our improved RPA calculations are shown to be in better agreement with the experimental values than other theoretical results.

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