![]() ![]() This paper presents the results of these surveys, the results of gamma spectroscopy, and a method for releasing existing computer equipment having naturally occurring radioactive materials. Since most surveys of cathode ray tubes in the literature were made while the units were energized and indicated low-energy x-rays, the use of naturally occurring radioactive materials in the manufacture of cathode ray tubes has not been widely recognized. The three glass components of CRTs are the funnel. Gamma spectroscopy indicates that the radioactivity is due to naturally occurring radioactive materials. Cathode-ray tubes (CRTs) from computer monitors and TV sets are a large component of such waste. The cathode ray tube (the wonky-looking device in the uppermost photograph of the instructable) is sensitive and will implode if care is not taken. However, it may be necessary to transport your cathode ray tube, or CRT, television during cold weather while moving, or store it in a unit without climate. However, recklessness (as usual) is not recomended. In a TV's cathode ray tube, the stream of electrons is focused by a focusing anode into a tight beam and then accelerated by an accelerating anode. These televisions yield tons of parts and the can be found at the goodwill for around five dollars. The anode is positive, so it attracts the electrons pouring off of the cathode. RCA demonstrated electronic television at the 1939 Worlds Fair and other manufacturers quickly began to develop products. Surveys were made of recently manufactured television sets with similar results. The 'ray' is a stream of electrons that naturally pour off a heated cathode into the vacuum. Braun’s diagram of his original 1897 cathode ray tube design. ![]() Similar surveys of computer monitors that were never in Contamination Areas confirmed that radioactivity was incorporated into the monitor. ![]() Hot spots were found also along the edges and seals of the cathode ray tube. The radioactivity was primarily on the front face of the cathode ray tube and was not amenable to decontamination. Louisville, CO USA- May 1, 2022: An analog signal is visualized on a Cathode Ray Tube. While surveying used computer equipment out of a zone posted as a Contamination Area, 100% of the computer monitors surveyed had levels of radioactivity that were significantly above background. A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. The cathode ray tube (CRT), invented by German physicist Karl Ferdinand Braun in 1897, is an evacuated glass envelope containing an electron gun (a source. ![]()
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