title: Revealing smuggled nuclear material covered by a legitimate radioisotope shipment using CdTe-based gamma-ray spectrometry.
abstract: Illicit trade of nuclear materials (NM) represents a serious challenge to radiation monitoring upon scenarios, when legitimate radioisotope shipments are used to obscure the weak radiation of NM. Planar and hemispherical Cd(Zn)Te detectors with a portable mini-multichannel analyzer were proven to be suitable, in measuring times of 10min order, for revealing the presence of low-enriched or natural U-bearing reactor fuel pellets in amounts of kg order, placed beside transport containers of lead or depleted uranium, which contain high activity 60Co (10GBq range) or 192Ir (TBq range) radioisotope sources. Such a hand-held or portable device may help authorities combating illicit trafficking of nuclear materials.
authors.affiliation: Institute of Isotope and Surface Chemistry, Hungarian Academy of Sciences, Chemical Research Center, Budapest, Hungary. lakosi@alpha0.iki.kfki.hu
authors.forename: L
authors.initials: L
authors.lastname: Lakosi
authors.forename: N C
authors.initials: NC
authors.lastname: Tam
authors.forename: J
authors.initials: J
authors.lastname: Zsigrai
authors.forename: J
authors.initials: J
authors.lastname: Sáfár
mesh_terms: D004867:Equipment Design; D011834:Radiation Monitoring / Q000379:methods*; D011868:Radioisotopes / Q000032:analysis*; D013051:Spectrometry, Gamma / Q000379:methods*; D023481:Terrorism / Q000517:prevention & control; D014186:Transportation; D014501:Uranium / Q000032:analysis
chemical_list: D011868:Radioisotopes; D014501:Uranium