The decay pattern of the Pygmy Dipole Resonance of 140Ce
Abstract
The decay properties of the Pygmy Dipole Resonance (PDR) have been investigated in the semi-magic N = 82 nucleus 140Ce using a novel combination of nuclear resonance fluorescence and γ–γ coincidence techniques. Branching ratios for transitions to low-lying excited states are determined in a direct and model-independent way both for individual excited states and for excitation energy intervals. Comparison of the experimental results to microscopic calculations in the quasi-particle phonon model exhibits an excellent agreement, supporting the observation that the Pygmy Dipole Resonance couples to the ground state as well as to low-lying excited states. In conclusion, a 10% mixing of the PDR and the [21+ × PDR] is extracted.
- Authors:
- more »
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1556159
- Alternate Identifier(s):
- OSTI ID: 1378506
- Report Number(s):
- LLNL-JRNL-695021
Journal ID: ISSN 0370-2693; S0370269316001386; PII: S0370269316001386
- Grant/Contract Number:
- FG02-91ER-40609; FG02-97ER-41033; AC52-07NA27344
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 756 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; γ-ray spectroscopy; 140Ce; Pygmy Dipole Resonance; Nuclear resonance fluorescence; Coincidence measurement; Quasi-particle phonon model
Citation Formats
Löher, B., Savran, D., Aumann, T., Beller, J., Bhike, M., Cooper, N., Derya, V., Duchêne, M., Endres, J., Hennig, A., Humby, P., Isaak, J., Kelley, J. H., Knörzer, M., Pietralla, N., Ponomarev, V. Yu., Romig, C., Scheck, M., Scheit, H., Silva, J., Tonchev, A. P., Tornow, W., Wamers, F., Weller, H., Werner, V., and Zilges, A. The decay pattern of the Pygmy Dipole Resonance of 140Ce. Netherlands: N. p., 2016.
Web. doi:10.1016/j.physletb.2016.02.042.
Löher, B., Savran, D., Aumann, T., Beller, J., Bhike, M., Cooper, N., Derya, V., Duchêne, M., Endres, J., Hennig, A., Humby, P., Isaak, J., Kelley, J. H., Knörzer, M., Pietralla, N., Ponomarev, V. Yu., Romig, C., Scheck, M., Scheit, H., Silva, J., Tonchev, A. P., Tornow, W., Wamers, F., Weller, H., Werner, V., & Zilges, A. The decay pattern of the Pygmy Dipole Resonance of 140Ce. Netherlands. doi:10.1016/j.physletb.2016.02.042.
Löher, B., Savran, D., Aumann, T., Beller, J., Bhike, M., Cooper, N., Derya, V., Duchêne, M., Endres, J., Hennig, A., Humby, P., Isaak, J., Kelley, J. H., Knörzer, M., Pietralla, N., Ponomarev, V. Yu., Romig, C., Scheck, M., Scheit, H., Silva, J., Tonchev, A. P., Tornow, W., Wamers, F., Weller, H., Werner, V., and Zilges, A. Sun .
"The decay pattern of the Pygmy Dipole Resonance of 140Ce". Netherlands. doi:10.1016/j.physletb.2016.02.042.
@article{osti_1556159,
title = {The decay pattern of the Pygmy Dipole Resonance of 140Ce},
author = {Löher, B. and Savran, D. and Aumann, T. and Beller, J. and Bhike, M. and Cooper, N. and Derya, V. and Duchêne, M. and Endres, J. and Hennig, A. and Humby, P. and Isaak, J. and Kelley, J. H. and Knörzer, M. and Pietralla, N. and Ponomarev, V. Yu. and Romig, C. and Scheck, M. and Scheit, H. and Silva, J. and Tonchev, A. P. and Tornow, W. and Wamers, F. and Weller, H. and Werner, V. and Zilges, A.},
abstractNote = {The decay properties of the Pygmy Dipole Resonance (PDR) have been investigated in the semi-magic N = 82 nucleus 140Ce using a novel combination of nuclear resonance fluorescence and γ–γ coincidence techniques. Branching ratios for transitions to low-lying excited states are determined in a direct and model-independent way both for individual excited states and for excitation energy intervals. Comparison of the experimental results to microscopic calculations in the quasi-particle phonon model exhibits an excellent agreement, supporting the observation that the Pygmy Dipole Resonance couples to the ground state as well as to low-lying excited states. In conclusion, a 10% mixing of the PDR and the [21+ × PDR] is extracted.},
doi = {10.1016/j.physletb.2016.02.042},
journal = {Physics Letters B},
number = C,
volume = 756,
place = {Netherlands},
year = {2016},
month = {5}
}
DOI: 10.1016/j.physletb.2016.02.042
Web of Science
Figures / Tables:

Works referencing / citing this record:
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The decay pattern of the Pygmy Dipole Resonance of $^{140}$Ce
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Study of photon strength functions via ( γ → , γ ′ , γ ″ ) reactions at the γ 3 -setup
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- EPJ Web of Conferences, Vol. 178
Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0°
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Figures / Tables found in this record: