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2010
Journal Article
Title
Lifetime effects for high-resolution gamma-ray spectroscopy at relativistic energies and their implications for the RISING spectrometer
Abstract
The lineshapes and peak position of Doppler corrected gamma-ray spectra from in-beam experiments at relativistic energies are investigated with respect to the intrinsic energy resolution of the employed detectors, the particles' velocities, and the photons' emission angle uncertainties at the moment of gamma-ray emission. The uncertainties in velocity and photon emission angle are dependent on the lifetime of the excited state. The impact of these two observables on the lineshape and energy resolution are studied for the RISING gamma-spectrometer by means of simulations and experimental results from a two-step fragmentation experiment at ~ 200MeV=u. Potential use of the distinct lineshape for lifetime determination is demonstrated for measured gamma-ray transitions.
Author(s)
Doornenbal, P.
Institut für Kernphysik, Universität zu Köln, Köln, Germany / GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
Bednarczyk, P.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / The Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
Bracco, A.
INFN Sezione di Milano, Milano, Italy / Dipartimento di Fisica, Universita di Milano, Milano, Italy
Caceres, L.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / Departamento de Fisica Teorica, Universidad Autonoma de Madrid, Madrid, Spain
Crespi, F.C.
INFN Sezione di Milano, Milano, Italy / Dipartimento di Fisica, Universita di Milano, Milano, Italy
Grebosz, J.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / The Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
Kavatsyuk, M.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / Taras Shevchenko Kiev National University, Kiev, Ukraine
Kavatsyuk, O.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / Taras Shevchenko Kiev National University, Kiev, Ukraine
Kmiecik, M.
The Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
Lozeva, R.
GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany / Faculty of Physics, St. Kliment Ohridski University of Sofia, Bulgaria
Meczynski, W.
The Niewodniczanski Institute of Nuclear Physics, Polish Academy of Science, Krakow, Poland