scholarly journals Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation

2011 ◽  
Vol 83 (4) ◽  
Author(s):  
Y. F. Niu ◽  
N. Paar ◽  
D. Vretenar ◽  
J. Meng
Keyword(s):  
Electron Capture ◽  
Finite Temperature ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Capture Rates

Expanded calculations of proton–neutron quasi-particle random phase approximation (pn-QRPA) electron capture rates on 55Co for presupernova and supernova physics

2008 ◽  
Vol 86 (6) ◽  
pp. 819-828 ◽  
Author(s):  
J -U Nabi ◽  
M Sajjad
Keyword(s):  
Electron Capture ◽  
Random Phase Approximation ◽  
Massive Star ◽  
Random Phase ◽  
Phase Approximation ◽  
Quasi Particle ◽  
21.60 Jz ◽  
First Time ◽  
Density Scale ◽  
Capture Rates

Because of its abundance and its relatively high capture rates, 55Co is one of the key nuclide that can control the dynamics of core collapse of a massive star. Previously we introduced our microscopic calculations of capture rates on 55Co using the proton–neutron quasi-particle random phase approximation (pn-QRPA) theory. Here, we present for the first time an expanded calculation of the electron capture rates on 55Co on an extensive temperature-density scale. This type of scale is appropriate for interpolation purposes and of greater utility for simulation codes.PACS Nos.: 26.50.+x, 21.60.Jz, 23.40.–s, 27.40.+z

Relativistic Random Phase Approximation At Finite Temperature

2009 ◽  
Author(s):  
Y. F. Niu ◽  
N. Paar ◽  
D. Vretenar ◽  
J. Meng ◽  
Matko Milin ◽  
...  
Keyword(s):  
Finite Temperature ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation
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