The decay pattern of the Pygmy Dipole Resonance of Ce-140

B. Löher, D. Savran, T. Aumann, J. Beller, M. Bhike, N. Cooper, V. Derya, M. Duchêne, J. Endres, A. Hennig, P. Humby, J. Isaak, J. H. Kelley, M. Knörzer, N. Pietralla, V. Yu. Ponomarev, C. Romig, M. Scheck, H. Scheit, J. Silva & 6 others A. P. Tonchev, W. Tornow, F. Wamers, H. Weller, V. Werner, A. Zilges

Research output: Contribution to journalArticle

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. A 10% mixing of the PDR and the [2+1 x PDR] is extracted.
Original languageEnglish
Pages (from-to)72-76
JournalPhysics Letters B
Volume756
DOIs
Publication statusPublished - 10 May 2016

Keywords

  • gamma-ray spectroscopy
  • Ce-140
  • Pygmy Dipole Resonance
  • Nuclear resonance fluorescence
  • Coincidence measurement
  • Quasi-particle phonon model

Cite this

Löher, B., Savran, D., Aumann, T., Beller, J., Bhike, M., Cooper, N., ... Zilges, A. (2016). The decay pattern of the Pygmy Dipole Resonance of Ce-140. Physics Letters B, 756, 72-76. https://doi.org/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 Ce-140. In: Physics Letters B. 2016 ; Vol. 756. pp. 72-76.
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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. A 10{\%} mixing of the PDR and the [2+1 x PDR] is extracted.",
keywords = "gamma-ray spectroscopy, Ce-140, Pygmy Dipole Resonance, Nuclear resonance fluorescence, Coincidence measurement, Quasi-particle phonon model",
author = "B. L{\"o}her and D. Savran and T. Aumann and J. Beller and M. Bhike and N. Cooper and V. Derya and M. Duch{\^e}ne and J. Endres and A. Hennig and P. Humby and J. Isaak and Kelley, {J. H.} and M. Kn{\"o}rzer and N. Pietralla and Ponomarev, {V. Yu.} and C. Romig and M. Scheck and H. Scheit and J. Silva and Tonchev, {A. P.} and W. Tornow and F. Wamers and H. Weller and V. Werner and A. Zilges",
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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, JH, Knörzer, M, Pietralla, N, Ponomarev, VY, Romig, C, Scheck, M, Scheit, H, Silva, J, Tonchev, AP, Tornow, W, Wamers, F, Weller, H, Werner, V & Zilges, A 2016, 'The decay pattern of the Pygmy Dipole Resonance of Ce-140' Physics Letters B, vol. 756, pp. 72-76. https://doi.org/10.1016/j.physletb.2016.02.042

The decay pattern of the Pygmy Dipole Resonance of Ce-140. / 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.

In: Physics Letters B, Vol. 756, 10.05.2016, p. 72-76.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The decay pattern of the Pygmy Dipole Resonance of Ce-140

AU - Löher, B.

AU - Savran, D.

AU - Aumann, T.

AU - Beller, J.

AU - Bhike, M.

AU - Cooper, N.

AU - Derya, V.

AU - Duchêne, M.

AU - Endres, J.

AU - Hennig, A.

AU - Humby, P.

AU - Isaak, J.

AU - Kelley, J. H.

AU - Knörzer, M.

AU - Pietralla, N.

AU - Ponomarev, V. Yu.

AU - Romig, C.

AU - Scheck, M.

AU - Scheit, H.

AU - Silva, J.

AU - Tonchev, A. P.

AU - Tornow, W.

AU - Wamers, F.

AU - Weller, H.

AU - Werner, V.

AU - Zilges, A.

PY - 2016/5/10

Y1 - 2016/5/10

N2 - 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. A 10% mixing of the PDR and the [2+1 x PDR] is extracted.

AB - 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. A 10% mixing of the PDR and the [2+1 x PDR] is extracted.

KW - gamma-ray spectroscopy

KW - Ce-140

KW - Pygmy Dipole Resonance

KW - Nuclear resonance fluorescence

KW - Coincidence measurement

KW - Quasi-particle phonon model

U2 - 10.1016/j.physletb.2016.02.042

DO - 10.1016/j.physletb.2016.02.042

M3 - Article

VL - 756

SP - 72

EP - 76

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

ER -

Löher B, Savran D, Aumann T, Beller J, Bhike M, Cooper N et al. The decay pattern of the Pygmy Dipole Resonance of Ce-140. Physics Letters B. 2016 May 10;756:72-76. https://doi.org/10.1016/j.physletb.2016.02.042