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Test of the modified BCS model at finite temperature

Ponomarev, V. Yu. and Vdovin, A. I. :
Test of the modified BCS model at finite temperature.
[Online-Edition: http://dx.doi.org/10.1103/PhysRevC.72.034309]
In: Physical Review C, 72 (3) 034309. ISSN 0556-2813
[Article] , (2005)

Official URL: http://dx.doi.org/10.1103/PhysRevC.72.034309
Item Type: Article
Erschienen: 2005
Creators: Ponomarev, V. Yu. and Vdovin, A. I.
Title: Test of the modified BCS model at finite temperature
Language: English
Journal or Publication Title: Physical Review C
Volume: 72
Number: 3
Publisher: American Physical Society
Divisions: 05 Department of Physics > Institute of Nuclear Physics
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik > D2: Kernstrukturuntersuchungen mit Relevanz für das experimentelle Programm
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik
05 Department of Physics
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC)
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 20 Jun 2011 07:13
Official URL: http://dx.doi.org/10.1103/PhysRevC.72.034309
Identification Number: doi:10.1103/PhysRevC.72.034309
Alternative Abstract:
Alternative abstract Language
A recently suggested modified BCS (MBCS) model has been studied at finite temperatures. We show that this approach does not allow the existence of the normal (nonsuperfluid) phase at any finite temperature (FT). Other MBCS predictions, such as a negative pairing gap, pairing induced by heating in closed-shell nuclei, and superfluid to super-superfluid phase transition are discussed also. The MBCS model is tested by comparing it with exact solutions for the picket fence model. Severe violation of the internal symmetry of the problem is detected. The MBCS equations are found to be inconsistent. The limit of the MBCS applicability has been determined to be far below the superfluid--normal phase transition of the conventional FT-BCS, where the model performs worse than the FT-BCS.English
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