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Photo-excitation of nucleon resonances from complex nuclei

Mertens, Thierry. Photo-excitation of nucleon resonances from complex nuclei. 2006, Doctoral Thesis, University of Basel, Faculty of Science.

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Official URL: http://edoc.unibas.ch/diss/DissB_8419

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Abstract

Photoproduction of [n] mesons off 12C, 40Ca, 93Nb, and natPb nuclei has been
measured with the tagged-photon-beam technique for incident photon energies
between 0.6 and 2.2 GeV. The experiment was performed at the Bonn ELSA ac-
celerator with the combined setup of the Crystal Barrel and TAPS calorimeters.
It aimed at the in-medium properties of the S11(1535) nucleon resonance and
the study of the absorption properties of nuclear matter for [n] mesons. Careful
consideration was given to contributions from [np] final states and secondary pro-
duction mechanisms of [n]-mesons e.g. from inelastic [p]N reactions of intermediate
pions. The analysis of the mass number scaling shows that the nuclear absortpion
cross section [o]N[n] for [n] mesons is constant over a wide range of the [n] momen-
tum. The comparison of the excitation functions to data off the deuteron and to
calculations in the framework of a BUU-model show no unexplained in-medium
modifications of the S11(1535).
Advisors:Krusche, Bernd
Committee Members:Schadmand, Susan
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Thesis
Thesis Subtype:Doctoral Thesis
Thesis no:8419
Thesis status:Complete
Number of Pages:104
Language:English
Identification Number:
edoc DOI:
Last Modified:22 Jan 2018 15:50
Deposited On:13 Feb 2009 16:38

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