Erlangen 2018 – wissenschaftliches Programm

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AGA: Arbeitsgruppe Physik und Abrüstung

AGA 1: Nuclear Safeguards

AGA 1.1: Vortrag

Mittwoch, 7. März 2018, 15:00–15:30, B 0.014

Study of Neutron Detection Technologies Using 6Li as a Replacement of 3HeTheo Köble, •Charlotte Bornhöft, Olaf Schumann, and Wolfram Berky — Fraunhofer-Institut für Naturwissenschaftlich-Technische Trendanalysen INT, Appelsgarten 2, 53879 Euskirchen

Within the past decade a significant shortage of 3He and correspondingly an enormous increase in cost has occurred. 3He is widely used in neutron detection applications, e.g. by first responders, during on-site inspections, and in other applications where nuclear and radioactive material has to be detected, localized and possibly identified. Therefore replacement materials need to be considered, selected, implemented in a corresponding detector, and thoroughly tested.

One of these promising basic elements is 6Li which is utilized in detector applications such as the scintillation materials CLYC (Cs2LiYCl6:Ce), and CLLB (Cs2LiLaBr6:Ce). These two detector types even offer the possibility of simultaneously measuring neutrons and gamma radiation with good discrimination capability. Within the detection materials neutrons are captured by 6Li, triggering the nuclear reaction 6Li(n,α)3He. The secondary particles then create light pulses in the scintillation crystal which ultimately serve as detection signals. The neutron and gamma radiation result in different pulse shapes which allow the discrimination.

We performed test measurements with both scintillation materials; the results gain information for further use as material in measurement systems in the field of nuclear safety and security.

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