Date: 5 months ago   Category: Studies

Physicists from Korea has created long-range "locator" of radioactive materials - RIA Novosti, 5/9/2017


The Korean physicists have learned to find radioactive materials at distance in kilometer from a radiation source
MOSCOW, on May 9 – RIA Novosti. The Korean scientists have developed the new technique of detection of radioactive materials capable to find even small amounts of unstable elements at distance in kilometer. "Instruction" for assembly of such device has been published in the Nature Communications magazine. "Two years ago the whole world was shaken recently by news about the UAV which has dumped radioactive sand on the residence of the prime minister of Japan. Similar "dirty bombs" can't be found beforehand by means of modern detectors of radiation as they don't work at long distances from a radiation source" — tell EunMi Choi from National institute of science and technologies in Ulsan (Korea) also its colleagues. The Geiger counters and other devices used today for detection of sources of radiation are guided by streams of photons and electrons of high energy which collision with gas atoms in the detector ionizes them and forces to carry current. The radioaktivny material, the more than such particles it develops that can be found on increase in conductivity of the dosimeter. © Photo: Emlyn Hughesuchenye: radiation level on Bikini Atoll still above нормыКак explains to Choi, similar approach well works at small distances from deposits or containers with unstable atoms, but during big removal from them the number of photons or electrons of high energy becomes too low to understand where there is their source. It does similar detectors useless for a prediction of the attacks of terrorists, searches of illegal radioactive freights and "dirty bombs". How to solve this problem? To Choi and her colleagues have paid attention to that, the same electrons developed by radioactive materials, will influence in a special way powerful bunches of electromagnetic radiation and a cloud of plasma which they create at the movement. For example, hit even of one electron in this cloud will lead to emergence of electric discharge in him and to formation secondary волн.© the Photo: Popov et al. / RSC Adv 2016 the Russian scientists have opened the nanoparticles protecting a body from radiatsiisvobodny electrons as scientists note, are present at air always, but their quantity is rather small. If to focus a beam on rather narrow area of space then hit of an electron in him will be actually guaranteed connected with existence of radioactive elements nearby. The Korean physics has checked this idea, using a simple set of devices – the powerful magnetron, the generator of microwave radiation, the focusing antenna, the sensor of radio waves and container with the cobalt-60 dangerous by isotope which is widely used in medicine and the industry today. During these experiments scientists watched time of emergence of a cloud of plasma, the category birth in him both a delay between the first and second event. © AFP 2017 the First nuclear explosion Lunykak has helped scientists to open birth secrets have shown these experiments, the similar combination of devices can find even trace quantities кобаль

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