Abstract
This paper reports on precision measurements of conversion lines in the decay of83mKr with nuclear transition energies of 32.1 keV and 9.4 keV, respectively. The spectra were taken from a submonolayer surface of83mKr frozen onto a cold backing, using the new Mainz solenoid retarding spectrometer. The high luminosity and resolution of this instrument enables the observation of all allowed conversion lines up to theN-shell and to fully separate the elastic component from inelastic satellites. The combined analysis of the data yields the transition energiesE y=32151.5±1.1 eV and 9405.9±0.8 eV, respectively. The experiment served also to pilot the application of this spectrometer to the question of a finite neutrino rest mass, searched for in theβ-decay spectrum of tritium and to problems in precision electron spectroscopy in general.
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Dedicated to Prof. Paul Kienle on the occasion of his 60th birthday
We would like to thank the Kernforschungszentrum Karlsruhe, especially the cyclotron laboratory for providing us with pure83Rb. The spectrometer was financed by the state of Rheinland-Pfalz and the Bundesminister für Forschung und Technologie providing funds for the new physics building of the university and its equipment. The Deutsche Forschungsgemeinschaft has contributed to the running and personal costs of the experiment under the contract number Ot33-11.
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Picard, A., Backe, H., Bonn, J. et al. Precision measurement of the conversion electron spectrum of83mKr with a solenoid retarding spectrometer. Z. Physik A - Hadrons and Nuclei 342, 71–78 (1992). https://doi.org/10.1007/BF01294491
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DOI: https://doi.org/10.1007/BF01294491