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Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce

Authors :
D. Savran
V. Derya
S. Bagchi
J. Endres
M.N. Harakeh
J. Isaak
N. Kalantar-Nayestanaki
E.G. Lanza
B. Löher
A. Najafi
S. Pascu
S.G. Pickstone
N. Pietralla
V.Yu. Ponomarev
C. Rigollet
C. Romig
M. Spieker
A. Vitturi
A. Zilges
Source :
Physics Letters B, Vol 786, Iss , Pp 16-20 (2018)
Publication Year :
2018
Publisher :
Elsevier, 2018.

Abstract

We report on the first (p,p′γ) experiments at Ep=80 MeV to investigate the Pygmy Dipole Resonance (PDR) in the semi-magic nucleus 140Ce. This experiment is the latest in a series of experiments to investigate the PDR with different complementary probes to provide a multi-messenger data set on the properties of the PDR in 140Ce. In addition, calculations within the Quasi-particle Phonon Model (QPM) have been performed. Cross sections have been calculated for proton- as well as α-scattering reactions based on the transition densities obtained from the QPM, not only at the RPA level, but including the full model space of up to 3p–3h configurations. This allows for the first time to compare the calculations to the experimental results on an absolute scale for single excitations. Agreement between QPM and experiment is observed, which proves the high accuracy of the calculated transition densities for individual PDR states. Keywords: Pygmy Dipole Resonance, E1 strength, Direct reactions, Collective levels, Quasi-particle Phonon Model

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
03702693
Volume :
786
Issue :
16-20
Database :
Directory of Open Access Journals
Journal :
Physics Letters B
Publication Type :
Academic Journal
Accession number :
edsdoj.3024a8b4d43a4237b70abecbb82727ba
Document Type :
article
Full Text :
https://doi.org/10.1016/j.physletb.2018.09.025