scholarly journals Isoscalar pairing interaction for the quasiparticle random-phase approximation approach to double- β and β decays

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
J. Terasaki ◽  
Y. Iwata
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Pairing Interaction ◽  
Quasiparticle Random Phase Approximation ◽  
Approximation Approach

LOWEST LYING 2+ AND 3- STATES OF Z-EVEN N = 50 ISOTONES IN RELATIVISTIC QUASIPARTICLE RANDOM PHASE APPROXIMATION

2009 ◽  
Vol 24 (38) ◽  
pp. 3103-3111 ◽  
Author(s):  
A. ANSARI ◽  
P. RING
Keyword(s):  
Random Phase Approximation ◽  
Mass Number ◽  
Random Phase ◽  
Interaction Strength ◽  
Adjustable Parameter ◽  
Phase Approximation ◽  
Pairing Interaction ◽  
Microscopic Approach ◽  
Quasiparticle Random Phase Approximation ◽  
Wide Range

We have studied the variation of the excitation energy, electric multipole decay rate and g factor of the lowest lying 2+ and 3- states of even-ZN = 50 isotones as a function of the mass number in relativistic quasiparticle random phase approximation. Overall agreement with the available data is quite satisfactory considering the wide range of the number of nuclei and their excitation properties in a microscopic approach having no free adjustable parameter. Also predictions are made for several nuclei. We find that increase in the pairing interaction strength, in general, improves the agreement with the data for 3- states but it affects adversely the results for the 2+ states.

scholarly journals A new renormalization procedure of the quasiparticle random phase approximation

2016 ◽  
Vol 25 (03) ◽  
pp. 1650017
Author(s):  
A. A. Raduta ◽  
C. M. Raduta
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Interaction Strength ◽  
Phase Approximation ◽  
Many Body ◽  
Pairing Interaction ◽  
Renormalization Procedure ◽  
Quasiparticle Random Phase Approximation ◽  
Exact Calculations ◽  
Single Formula

The ground state of a many body Hamiltonian considered in the quasiparticle representation is redefined by accounting for the quasiparticle quadrupole pairing interaction. The residual interaction of the newly defined quasiparticles is treated by the quasiparticle random phase approximation (QRPA). Solutions of the resulting equations exhibit specific features. In particular, there is no interaction strength where the first root is vanishing. A comparison with other renormalization methods is presented. Application to a single [Formula: see text]-shell allows for the results interpretation by comparing them with those obtained by exact calculations.

Neutrino reactions onC12by the quasiparticle random-phase approximation (QRPA)

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
Myung-Ki Cheoun ◽  
Eunja Ha ◽  
Su Youn Lee ◽  
K. S. Kim ◽  
W. Y. So ◽  
...  
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Quasiparticle Random Phase Approximation
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