Benchmarking nuclear models for Gamow–Teller response

Litvinova, Elena and Brown, B.A. and Fang, D.-L. and Marketin, Tomislav and Zegers, R. G. T. (2014) Benchmarking nuclear models for Gamow–Teller response. Physics Letters B, 730. pp. 307-313. ISSN 0370-2693

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A comparative study of the nuclear Gamow–Teller response (GTR) within conceptually different state-of-the-art approaches is presented. Three nuclear microscopic models are considered: (i) the recently developed charge-exchange relativistic time blocking approximation (RTBA) based on the covariant density functional theory, (ii) the shell model (SM) with an extended “jj77” model space and (iii) the non-relativistic quasiparticle random-phase approximation (QRPA) with a Brueckner G-matrix effective interaction. We study the physics cases where two or all three of these models can be applied. The Gamow–Teller response functions are calculated for 208Pb, 132Sn and 78Ni within both RTBA and QRPA. The strengths obtained for 208Pb are compared to data that enable a firm model benchmarking. For the nucleus 132Sn, also SM calculations are performed within the model space truncated at the level of a particle–hole (ph) coupled to vibration configurations. This allows a consistent comparison to the RTBA where ph⊗phonon coupling is responsible for the spreading width and considerable quenching of the GTR. Differences between the models and perspectives of their future developments are discussed.

Item Type: Article
Keywords: Gamow-Teller; nuclear models
Date: 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2014 Elsevier B.V. Open access under CC BY license. Funded by SCOAP3. Received 2 October 2013. Received in revised form 1 February 2014. Accepted 3 February 2014. Available online 6 February 2014.
Divisions: Faculty of Science > Department of Physics
Publisher: Elsevier
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 04 Dec 2017 07:31
Last Modified: 04 Dec 2017 07:31

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