Two different experimental approaches were combined to study the
electric dipole strength in the doubly-magic nucleus Ca-48 below the
neutron threshold. Real-photon scattering experiments using
bremsstrahlung up to 9.9 MeV and nearly mono-energetic linearly
polarized photons with energies between 6.6 and 9.51 MeV provided
strength distribution and parities, and an (alpha, alpha'gamma)
experiment at E-alpha = 136 MeV gave cross sections for an isoscalar
probe. The unexpected difference observed in the dipole response is
compared to calculations using the first-order random-phase
approximation and points to an energy-dependent isospiu character. A
strong isoscalar state at 7.6 MeV was identified for the first time
supporting a recent theoretical prediction. (C) 2014 The Authors.
Published by Elsevier B.V.
%0 Journal Article
%1 ISI:000333506400048
%A Derya, V.
%A Savran, D.
%A Endres, J.
%A Harakeh, M. N.
%A Hergert, H.
%A Kelley, J. H.
%A Papakonstantinou, P.
%A Pietralla, N.
%A Ponomarev, V. Yu.
%A Roth, R.
%A Rusev, G.
%A Tonchev, A. P.
%A Tornow, W.
%A Wortche, H. J.
%A Zilges, A.
%D 2014
%J Physics Letters B
%K imported myown zilges
%P 288-292
%R 10.1016/j.physletb.2014.01.050
%T Isospin properties of electric dipole excitations in Ca-48
%V 730
%X Two different experimental approaches were combined to study the
electric dipole strength in the doubly-magic nucleus Ca-48 below the
neutron threshold. Real-photon scattering experiments using
bremsstrahlung up to 9.9 MeV and nearly mono-energetic linearly
polarized photons with energies between 6.6 and 9.51 MeV provided
strength distribution and parities, and an (alpha, alpha'gamma)
experiment at E-alpha = 136 MeV gave cross sections for an isoscalar
probe. The unexpected difference observed in the dipole response is
compared to calculations using the first-order random-phase
approximation and points to an energy-dependent isospiu character. A
strong isoscalar state at 7.6 MeV was identified for the first time
supporting a recent theoretical prediction. (C) 2014 The Authors.
Published by Elsevier B.V.
@article{ISI:000333506400048,
abstract = {Two different experimental approaches were combined to study the
electric dipole strength in the doubly-magic nucleus Ca-48 below the
neutron threshold. Real-photon scattering experiments using
bremsstrahlung up to 9.9 MeV and nearly mono-energetic linearly
polarized photons with energies between 6.6 and 9.51 MeV provided
strength distribution and parities, and an (alpha, alpha'gamma)
experiment at E-alpha = 136 MeV gave cross sections for an isoscalar
probe. The unexpected difference observed in the dipole response is
compared to calculations using the first-order random-phase
approximation and points to an energy-dependent isospiu character. A
strong isoscalar state at 7.6 MeV was identified for the first time
supporting a recent theoretical prediction. (C) 2014 The Authors.
Published by Elsevier B.V.},
added-at = {2019-11-20T10:09:48.000+0100},
author = {Derya, V. and Savran, D. and Endres, J. and Harakeh, M. N. and Hergert, H. and Kelley, J. H. and Papakonstantinou, P. and Pietralla, N. and Ponomarev, V. Yu. and Roth, R. and Rusev, G. and Tonchev, A. P. and Tornow, W. and Wortche, H. J. and Zilges, A.},
biburl = {https://www.bibsonomy.org/bibtex/2d5552e08273899396a545351dde0d057/ikpcologne},
doi = {10.1016/j.physletb.2014.01.050},
eissn = {1873-2445},
interhash = {fad02fe4524c5dd0a0a9aaa2364a2ae8},
intrahash = {d5552e08273899396a545351dde0d057},
issn = {0370-2693},
journal = {Physics Letters B},
keywords = {imported myown zilges},
month = {MAR 7},
orcid-numbers = {Papakonstantinou, Panagiota/0000-0002-7119-6667
Hergert, Heiko/0000-0003-0520-0856
Pietralla, Norbert/0000-0002-4797-3032
kelley, john/0000-0001-8578-2723},
pages = {288-292},
researcherid-numbers = {Roth, Robert/B-6502-2008
Papakonstantinou, Panagiota/B-6799-2008
Hergert, Heiko/G-9597-2016
Pietralla, Norbert/L-8465-2017
Ponomarev, Vladimir Yu./K-6344-2018},
timestamp = {2019-11-20T10:09:48.000+0100},
title = {Isospin properties of electric dipole excitations in Ca-48},
unique-id = {ISI:000333506400048},
volume = 730,
year = 2014
}