TY  - JOUR
A1  - Löher, Bastian
A1  - Savran, Deniz
A1  - Aumann, Thomas
A1  - Beller, Jacob Daniel
A1  - Bhike, Megha
A1  - Cooper, Nathan L.
A1  - Derya, Vera
A1  - Duchêne, Marc
A1  - Endres, Janis
A1  - Hennig, Andreas
A1  - Humby, P.
A1  - Isaak, Johann
A1  - Kelley, John H.
A1  - Knörzer, Michael
A1  - Pietralla, Norbert
A1  - Ponomarev, Vladimir Yu.
A1  - Romig, Christopher
A1  - Scheck, Marcus
A1  - Scheit, Heiko
A1  - Silva, Joel
A1  - Tonchev, Anton P.
A1  - Tornow, Werner
A1  - Wamers, Felix
A1  - Weller, Henry R.
A1  - Werner, Volker
A1  - Zilges, Andreas
T1  - The decay pattern of the Pygmy Dipole Resonance of ¹⁴⁰Ce
T2  - Physical letters. B
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 [21+ x PDR] is extracted.
KW  - γ-ray spectroscopy
KW  - 140Ce
KW  - Pygmy Dipole Resonance
KW  - Nuclear resonance fluorescence
KW  - Coincidence measurement
KW  - Quasi-particle phonon model
Y1  - 2016
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62861
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-628617
SN  - 1873-2445
N1  - The work described in this article is supported by the Alliance Program of the Helmholtz Association (HA216/EMMI), the DFG (SFB 1245 and ZI510/7-1) and U.S. DOE grants No. DE-FG02-91ER-40609 and No. DE-FG02-97ER-41033.
N1  - Funded by SCOAP3.
VL  - 756
SP  - 72
EP  - 76
PB  - North-Holland Publ.
CY  - Amsterdam
ER  -