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Coherent π0 photoproduction from ⁴He

Rambo, F. and Achenbach, P. and Ahrens, J. and Arends, H. J. and Beck, R. and Hall, S. J. and Hejny, V. and Jennewein, P. and Kamalov, S. S. and Kotulla, M. and Krusche, B. and Kuhr, V. and Leukel, R. and Metag, V. and Novotny, R. and de Leon, V. O. and Schmidt, A. and Schumacher, M. and Siodlaczek, U. and Smend, F. and Stroher, H. and Weiss, J. and Wissmann, F. and Wolf, M.. (1999) Coherent π0 photoproduction from ⁴He. Nuclear physics. A, Nuclear and hadronic physics, Vol. 660, H. 1. pp. 69-83.

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Official URL: http://edoc.unibas.ch/dok/A5261972

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Abstract

Differential cross sections and beam asymmetries for coherent pi(0) photoproduction from He-4 in the Delta energy-range have been measured with high statistical and systematic precision using both decay photons for identifying the process. The experiment was performed at the MAinz MIcrotron using the TAPS photon spectrometer and the Glasgow/Mainz tagged photon facility. The differential cross sections are in excellent agreement with predictions based on the DWIA if an appropriate parametrization of the Delta-nuclear interaction is applied. The beam asymmetries are interpreted in terms of degrees of linear polarization of collimated coherent bremsstrahlung. The expected increase of the degree of linear polarization with decreasing collimation angle is confirmed. Agreement with calculations is obtained on a few-percent level of precision in the maxima of the coherent peaks.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:North Holland
ISSN:0375-9474
Note:Variant title: Coherent pi(0) photoproduction from He-4 -- Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:46

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