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Zeynalova S.,Joint Institute for Nuclear Research | Zeynalovaab O.,Moscow State Institute of Radioengineering | Nazarenkob M.A.,EC JRC IRMM Institute for Reference Materials and Measurements | Hambschc F.-J.,Joint Institute for Nuclear Research | Oberstedtc S.,Joint Institute for Nuclear Research
AIP Conference Proceedings | Year: 2012

In this work we report recent achievements in design of twin back-to-back ionization chamber (TIC) for fission fragment (FF) mass and kinetic energy spectroscopy. Correlated FF kinetic energies, their masses and the angle of the fission axes in 3D Cartesian coordinates can be determined from analysis of the heights and shapes of the pulses induced by the fission fragments on the anodes of TIC. Anodes of TIC were designed as consisting of isolated strips each having independent electronic circuitry and special multi-channel pulse processing apparatus. Mathematical algorithms were provided along with formulae derived for fission axis angles determination. It was shown how the point of fission fragments origin on the target plane may be determined using the same measured data. The last feature made the TIC a rather powerful tool for prompt fission neutron (PFN) emission investigation in event by event analysis of individual fission reactions from non point fissile source. Position sensitive neutron induced fission detector for neutron imaging applications with both thermal and low energy neutrons was found as another possible implementation of the designed TIC © 2012 American Institute of Physics.


Tzika F.,EC JRC IRMM Institute for Reference Materials and Measurements | Hult M.,EC JRC IRMM Institute for Reference Materials and Measurements | Burda O.,Physikalisch - Technische Bundesanstalt | Arnold D.,Physikalisch - Technische Bundesanstalt | And 14 more authors.
Radiation Physics and Chemistry | Year: 2015

A comparison was conducted, between 11 European National Metrology Institutes and EC-JRC, on measurement of 137Cs activity concentration in fume dust. As test material an activity standard produced from real contaminated fume dust was used. The standard material consisted of 13 cylindrical samples of compressed fume dust. The material contained 137Cs and 60Co of reference activity concentrations of (9.72±0.10)Bq/g and (0.450±0.018)Bq/g, respectively, for the reference date of 1 June 2013, determined using the comparison results. The organization and results of the intercomparison, as well as the process of obtaining reliable reference values are presented. © 2015 The Authors.

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