Präzise Messung der γ-Absolutintensität niederenergetischer Übergänge bei (n, γ)-Reaktionen und beim radioaktiven Zerfall mit einem Kristallspektrometer
Open Access
- 1 September 1966
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 21 (9) , 1328-1343
- https://doi.org/10.1515/zna-1966-0902
Abstract
A direct and an indirect method for accurate measurement of absolute intensities of low-energy γ-rays from neutron capture and radioactive decay by means of a crystal spectrometer is described. The 478-keV peak of Li7 (target B10) is used in the direct method while the 412-keV peak of Hg198 (target Au) is used in the indirect method. In addition the intensity calibration of the crystal spectrometer used in FRM (Munich Research Reactor), determination of the neutron capture rate and corrections for γ and neutron self-absorption are discussed in some detail. Absolute γ-intensities per neutron capture or decay respectively were determined for a number of strong low energy γ transitions in Rh104, Cd114, Sm150, Sm153, Eu152, Eu153, Eu154, Gd156, Gd158, Dy162, Dy163, Dy164, Dy165, Ho165, Ho166 and Er166. An accuracy of 2% was obtained in the most favorable cases.Keywords
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