Test of the Brink-Axel hypothesis for the pygmy dipole resonance
| Autor: | Kichiji Hatanaka, Norbert Pietralla, P. von Neumann-Cosel, Dirk Martin, L. M. Donaldson, Markus Zweidinger, V. Yu. Ponomarev, Nori Aoi, T. Hashimoto, B. Liu, Atsushi Tamii, Tatsushi Shima, Yoshitaka Fujita, K. Miki, T. Yamamoto, Achim Richter, Yusuke T. Maeda, I. Poltoratska, Tsuyohito Ito, H. Fujita, A. Krugmann, S. Bassauer, Carlos A. Bertulani, R. Neveling, J. Carter |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
010308 nuclear & particles physics Strength function Nuclear Theory General Physics and Astronomy FOS: Physical sciences State (functional analysis) 01 natural sciences Resonance (particle physics) Dipole 0103 physical sciences Atomic physics Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Energy (signal processing) |
| Popis: | The gamma strength function and level density of 1- states in 96Mo have been extracted from a high-resolution study of the (p,p') reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus $\gamma$ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the Pygmy Dipole Resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of initial and final state. The present results validiate the Brink-Axel hypothesis for 96Mo and provide independent confirmation of the methods used to separate gamma strength function and level density in $\gamma$ decay experiments. Comment: 6 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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