Validation of Calculated Self-Shielding Factors for Rh Foils

Rhodium foils of about 5 mm diameter were obtained from IRMM. One foil had thickness of 0.006 mm and three were 0.112 mm thick. They were irradiated in the pneumatic transfer system and in the carousel facility of the TRIGA reactor at the Jo¿ef Stefan Institute. The foils were irradiated bare and enclosed in small cadmium boxes (about 2 g weight) of 1 mm thickness to minimise the perturbation of the local neutron flux. They were co-irradiated with 5 mm diameter and 0.2 mm thick Al-Au(0.1%) alloy monitor foils. The resonance self-shielding corrections for the 0.006 mm and 0.112 mm thick samples were calculated by Monte Carlo simulation and amount to about 10 % and 60 %, respectively. The consistency of the measurements confirmed the validity of the self-shielding factors. Trial estimates of the Q0 and k0 factors for the 555.8 keV gamma line of 104Rh were made and amount to 6.65±0.18 and (6.61±0.12) × 10 2, respectively. The quoted uncertainty is the spread from the mean of two measurements, and not the true uncertainty.

JACIMOVIC R.;  TRKOV Andrej;  ZEROVNIK G.;  SNOJ L.;  SCHILLEBEECKX Peter; 

2010-09-07

ELSEVIER SCIENCE BV

JRC56123

0168-9002,   

www.elsevier.com/locate/nima,    https://publications.jrc.ec.europa.eu/repository/handle/JRC56123,   

10.1016/j.nima.2010.02.053,