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Title: Role of momentum transfer in the quenching of the Gamow-Teller strength

Abstract

A recent analysis of (p,n) and (n,p) reaction data from {sup 90}Zr was performed recently, where a significant amount of Gamow-Teller strength was found above the resonance, an energy region previously unreachable by experimental setups. The extracted strengths in the {beta}{sub -} and the {beta}{sub +} channel indicate that approximately 10% of the total strength necessary to satisfy the model independent Ikeda sum rule is missing. One possible source of this discrepancy is the treatment of the isovector spin monopole (IVSM) mode of excitation which has been found to occurr at high excitation energies. Employing the relativistic Hartree-Bogoliubov (RHB) model and the protonneutron relativistic quasiparticle random phase approximation (pn-RQRPA) to calculate the nuclear response, we explore the contribution of the IVSM mode to the total L= 0 strength and apply our results to the available data.

Authors:
; ; ;  [1];  [2];  [3]
  1. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt, Germany and Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb (Croatia)
  2. (Germany)
  3. (Croatia)
Publication Date:
OSTI Identifier:
22075603
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1491; Journal Issue: 1; Conference: Conference on nuclear structure and dynamics 2012, Opatija (Croatia), 9-13 Jul 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; EXCITATION; GAMOW-TELLER RULES; ISOVECTORS; MOMENTUM TRANSFER; NEUTRON REACTIONS; NEUTRONS; NUCLEAR STRUCTURE; PROTON REACTIONS; PROTON-NUCLEON INTERACTIONS; QUENCHING; RANDOM PHASE APPROXIMATION; RELATIVISTIC RANGE; SPIN; SUM RULES; ZIRCONIUM 90

Citation Formats

Marketin, T., Martinez-Pinedo, G., Paar, N., Vretenar, D., Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt, and Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb. Role of momentum transfer in the quenching of the Gamow-Teller strength. United States: N. p., 2012. Web. doi:10.1063/1.4764234.
Marketin, T., Martinez-Pinedo, G., Paar, N., Vretenar, D., Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt, & Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb. Role of momentum transfer in the quenching of the Gamow-Teller strength. United States. doi:10.1063/1.4764234.
Marketin, T., Martinez-Pinedo, G., Paar, N., Vretenar, D., Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt, and Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb. Sat . "Role of momentum transfer in the quenching of the Gamow-Teller strength". United States. doi:10.1063/1.4764234.
@article{osti_22075603,
title = {Role of momentum transfer in the quenching of the Gamow-Teller strength},
author = {Marketin, T. and Martinez-Pinedo, G. and Paar, N. and Vretenar, D. and Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt and Physics Department, Faculty of Science, University of Zagreb, 10000 Zagreb},
abstractNote = {A recent analysis of (p,n) and (n,p) reaction data from {sup 90}Zr was performed recently, where a significant amount of Gamow-Teller strength was found above the resonance, an energy region previously unreachable by experimental setups. The extracted strengths in the {beta}{sub -} and the {beta}{sub +} channel indicate that approximately 10% of the total strength necessary to satisfy the model independent Ikeda sum rule is missing. One possible source of this discrepancy is the treatment of the isovector spin monopole (IVSM) mode of excitation which has been found to occurr at high excitation energies. Employing the relativistic Hartree-Bogoliubov (RHB) model and the protonneutron relativistic quasiparticle random phase approximation (pn-RQRPA) to calculate the nuclear response, we explore the contribution of the IVSM mode to the total L= 0 strength and apply our results to the available data.},
doi = {10.1063/1.4764234},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1491,
place = {United States},
year = {2012},
month = {10}
}