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A measurement to determine the thermal neutron capture cross section of (99)Tc has started at the high flux reactor (HFR) in Petten. This cross section is an important parameter for the transmutation of (99)Tc into the stable isotope (100)Ru. The capture gamma-ray technique is applied in experiments at the HFR in Petten to improve the accuracy of this cross section. A sample consisting of a mixture of sulphur and technetium is exposed to thermal neutrons from a multi-reflecting mirror system at the HFR. The gamma-rays of the (32)S(n, gamma) and (99)Tc(n,gamma) reactions are measured with a high purity germanium detector. Using the intensities of several well-known gamma rays in both isotopes, the cross section of Tc can be related to that of S. This paper presents the status of the current experiment.

Additional information

Authors: STECHER-RASMUSSEN F, Netherlands Energy Research Foundation ECN, Petten (NL);GRUPPELAAR H, Netherlands Energy Research Foundation ECN, Petten (NL);KOPECKY J, Netherlands Energy Research Foundation ECN, Petten (NL);GUNSING F, CEA, CEN Saclay, Gif-sur-Yvette (FR);WEIGMANN H, JRC Geel (BE)
Bibliographic Reference: Paper presented: International Conference on Nuclear Data for Science and Technology, Trieste (IT), 19-24 May 1997
Availability: Available from (1) as Paper EN 40442 ORA
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