COMMISSION OF THE EUROPEAN COMMUNITIES fUwflrffi lit ».«♦its iiii ilMMllSiiiliiSlll L¿£t¿a VARIABLE DEAD TIME NEUTRON COUNTER jjfOR TAMPER RESISTANT MEASUREMENTS SI OF SPONTANEOUS FISSION NEUTRONS 'it*í '.¿ι- ; .Sil Hf δ*ώ'! UV ώ UJ* Ρτ'·^£* wl«,,; ω ¿1?F; ''HJK' .JSiesiiiii lii «1 SI! ¿i-1!*«* **tff "*% ìWt ^1 J^iiiflt l'ili'ef im & Baia» Joint Nuclear Research Centre TJÎ.T BÍ Ispra Establishment - Italy Physics Division and Technology Division á;iif|i|liii Paper presented at the International Meeting on Non-Destructive Measurement and Identification Techniques in Nuclear Safeguards ..It I .-* Ispra (Italy) September 20-22, 1971 ' fff/'Im ¡bilfil 'mm This document was prepared under the sponsorship of the Commission of the European Communities. nun immunities, its Neither the Commission of the European Communities contractors nor any person acting on their behalf ' lniorziiatiun CUIIUSJUCU m WHO uuv-uiuum,, «^ „+**.* *,— —~_— -—-„ information, apparatus, method, or process disclosed in this document may not infringe privately owned rights ; or ¡Pratt ISMBÌ^^SPS ^SiSslw assume any liability with respect to the use of, or for damages resulting from the use of any information, apparatus, method J , · - at the price of B.Fr. 25-When ordering, please quote the EUR number and the title, which are indicated on the cover of each report. Printed by L. Vanmelle s.a.