Universität zu Köln

Derya, V., Savran, D., Endres, J., Harakeh, M. N., Hergert, H., Kelley, J. H., Papakonstantinou, P., Pietralla, N., Ponomarev, V. Yu., Roth, R., Rusev, G., Tonchev, A. P., Tornow, W., Wortche, H. J. and Zilges, A. (2014). Isospin properties of electric dipole excitations in Ca-48. Phys. Lett. B, 730. S. 288 - 293. AMSTERDAM: ELSEVIER. ISSN 1873-2445

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Derya, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Savran, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Endres, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Harakeh, M. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hergert, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kelley, J. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Papakonstantinou, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pietralla, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ponomarev, V. Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Roth, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rusev, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tonchev, A. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tornow, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wortche, H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zilges, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-443498
DOI:	10.1016/j.physletb.2014.01.050
Journal or Publication Title:	Phys. Lett. B
Volume:	730
Page Range:	S. 288 - 293
Date:	2014
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1873-2445
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NUCLEAR-STRUCTURE; STRENGTH; NEUTRON; ENERGY; RESONANCE; ALPHA Multiple languages Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44349