Savran, D., Isaak, J., Schwengner, R., Massarczyk, R., Scheck, M., Tornow, W., Battaglia, G., Beck, T., Finch, S. W., Fransen, C., Friman-Gayer, U., Gonzalez, R., Hoemann, E., Janssens, R. V. F., Johnson, S. R., Jones, M. D., Kleemann, J., Krishichayan, V., Little, D. R., O'Donnell, D., Papst, O., Pietralla, N., Sinclair, J., Werner, V., Wieland, O. and Wilhelmy, J. (2022). Model-independent determination of the dipole response of 66Zn using quasimonoenergetic and linearly polarized photon beams. Phys. Rev. C, 106 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

Background: Photon strength functions are an important ingredient in calculations relevant for the nucleosynthesis of heavy elements. The relation to the photoabsorption cross section allows to experimentally constrain photon strength functions by investigating the photoresponse of atomic nuclei. Purpose: We determine the photoresponse of 66Zn in the energy region of 5.6 MeV to 9.9 MeV and analyze the contribution of the 'elastic' decay channel back to the ground state. In addition, for the elastic channel electric and magnetic dipole transitions were separated. Methods: Nuclear resonance fluorescence experiments were performed using a linearly polarized quasi-monoenergetic photon beam at the High Intensity gamma -ray Source. Photon beam energies from 5.6 to 9.9 MeV with an energy spread of about 3% were selected in steps of 200-300 keV. Two high purity germanium detectors were used for the subsequent gamma -ray spectroscopy. Results: Full photoabsorption cross sections are extracted from the data making use of the monoenergetic character of the photon beam. For the ground-state decay channel, the average contribution of electric and magnetic dipole strengths is disentangled. The average Conclusions: The new results indicate lower cross sections when compared to the values extracted from a former experiment using bremsstrahlung on 66Zn. In the latter, the average branching ratio to the ground state is estimated from statistical-model calculations in order to analyze the data. Corresponding estimates from statistical-model calculations underestimate this branching ratio compared to the values extracted from the present analysis, which would partly explain the high cross sections determined from the bremsstrahlung data.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Savran, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Isaak, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schwengner, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Massarczyk, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scheck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tornow, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Battaglia, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beck, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Finch, S. W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fransen, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Friman-Gayer, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hoemann, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Janssens, R. V. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnson, S. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jones, M. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kleemann, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krishichayan, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Little, D. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
O'Donnell, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Papst, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pietralla, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sinclair, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Werner, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wieland, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wilhelmy, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-694095
DOI: 10.1103/PhysRevC.106.044324
Journal or Publication Title: Phys. Rev. C
Volume: 106
Number: 4
Date: 2022
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
STRENGTH FUNCTIONSMultiple languages
Physics, NuclearMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/69409

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