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Nature of the Pygmy Dipole Resonance in Ce140 Studied in (α, α′γ) Experiments

Savran, D. ; Babilon, M. ; Berg, A. M. van den ; Harakeh, M. ; Hasper, J. ; Matic, A. ; Wörtche, H. J. ; Zilges, A. (2006):
Nature of the Pygmy Dipole Resonance in Ce140 Studied in (α, α′γ) Experiments.
In: Physical Review Letters, 97 (17), p. 172502. APS, ISSN 0031-9007,
[Article]

Item Type: Article
Erschienen: 2006
Creators: Savran, D. ; Babilon, M. ; Berg, A. M. van den ; Harakeh, M. ; Hasper, J. ; Matic, A. ; Wörtche, H. J. ; Zilges, A.
Title: Nature of the Pygmy Dipole Resonance in Ce140 Studied in (α, α′γ) Experiments
Language: English
Journal or Publication Title: Physical Review Letters
Journal volume: 97
Number: 17
Publisher: APS
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Zentrale Einrichtungen
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)
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) > A: Kernstrukturphysik
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) > A: Kernstrukturphysik > A1: Kernstrukturphysik mit reellen Photonen
Date Deposited: 20 Jun 2011 07:12
Official URL: http://dx.doi.org/10.1103/PhysRevLett.97.172502
Identification Number: doi:10.1103/PhysRevLett.97.172502
Alternative Abstract:
Alternative abstract Language

A concentration of electric-dipole excitations below the particle threshold, which is frequently denoted as the pygmy dipole resonance, has been studied in the semimagic nucleus 140Ce in (alpha, alpha[prime]gamma) experiments at Ealpha=136 MeV. The technique of alpha-gamma coincidence experiments allows the separation of E1 excitations from states of other multipolarities in the same energy region and provides an excellent energy resolution to allow a detailed analysis for each state. The experimental results show that the PDR splits into two parts with different nuclear structure: one part which is excited in (alpha, alpha[prime]gamma) as well as (gamma, gamma[prime]) experiments and one part which is excited only in (gamma, gamma[prime]).

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