| 单词 | beta ray |
| 例句 | Radium emitted alpha particles at a meager 7.6 million electron volts and beta rays—that is, electrons—at only 3 million volts. Big Science 2015-07-07T00:00:00Z Eventually alpha rays were identified as helium atoms stripped of their electrons—that is, helium nuclei-—and beta rays as energetic electrons. Big Science 2015-07-07T00:00:00Z Americium-241, an isotope that emits gamma and beta rays as it decays, is found in homes around the world in an unassuming device: a fire alarm. Australia radioactive capsule: Missing material more common than you think 2023-02-03T05:00:00Z "It emits both beta rays and gamma rays so if you have it close to you, you could either end up with skin damage including skin burns," the state's Chief Health Officer Andy Robertson warned. How a tiny radioactive capsule was found in Australia's vast outback 2023-02-01T05:00:00Z The electron is emitted from the nucleus as a beta ray. An Introduction to Geology 2017-01-01T00:00:00Z Some of these sensors collect particles on a filter and then shine beta rays through them to measure mass. Cheaper air quality sensors arrived just in time for the climate catastrophe 2020-09-16T04:00:00Z Potential sources of exposure, the agency found, included inhaling or ingesting uranium dust or fumes as well as gamma or beta rays while handling or working near the depleted uranium. Depleted uranium at Wah Chang led to decades of health woes 2016-06-21T04:00:00Z "Since they emit beta rays we weren't able to detect them until recently. Specific tools were necessary and we couldn't afford them," says Suzuki. The mothers who set up a radiation lab - BBC News 2016-03-12T05:00:00Z Tepco said the radiation measured was beta rays, which would be easier to protect against than gamma rays. Radiation Readings Spike at Water Tank at Japan's Ruined Nuclear Plant 2013-09-01T20:45:04.600Z In her work, she established the nature of radiation and beta rays, and discovered and isolated polonium and radium. Scientific American Defends Marie Curie and Women Scientists in 1911 2011-12-06T19:15:11.590Z Man did not find only these rays—he discovered that electrons were escaping, but before he had recognised what we were, he had named us beta rays. Autobiography of an Electron Wherein the Scientific Ideas of the Present Time Are Explained in an Interesting and Novel Fashion 2011-06-19T02:00:25.633Z Beta Rays The beta rays are negatively charged and have a greater penetrating power than the alpha rays. A Brief Account of Radio-activity Of these the beta rays are deviated strongly by the magnetic field, the alpha much less so—very slightly, in fact—while the gamma rays are not affected at all. A History of Science, Volume 5(of 5) Aspects Of Recent Science The radium capsule, if applied within the esophagus, should be so screened that the soft, irritating, beta rays, and the secondary rays, are both filtered out to prevent sloughing of the esophageal mucosa. Bronchoscopy and Esophagoscopy A Manual of Peroral Endoscopy and Laryngeal Surgery The beta ray of radium will penetrate solid iron a foot thick, a feat that would give a spirit pause. The Breath of Life Some of them, the beta rays, are negative electrons, only about one seven-thousandth the size of the others, but are ejected with almost the speed of light, 186,000 miles a second. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries The beta rays are identical in type with the cathode rays and are negative electrons. A Brief Account of Radio-activity The beta rays are on all points similar to the cathode rays; they are, as M. and Madame Curie have shown, negatively charged, and the charge they carry is always the same. The New Physics and Its Evolution A large number of beta rays are also emitted during this time, but they are unimportant because their range is not very great, only a few feet. The Atomic Bombings of Hiroshima and Nagasaki The beta rays, or emanations from radium, penetrating one foot of solid iron are very convincing. The Breath of Life The beta rays come next, say, about an inch and a half. The War Terror The beta rays are particles of negative electricity or electrons. A Brief Account of Radio-activity Phosphorescence and fluorescence seem especially to result from the alpha and beta rays, particularly from the alpha rays, to which belongs the most important part of the total energy of the radiation. The New Physics and Its Evolution The statement is made by Rutherford that indirect evidence obtained from the study of the aurora suggests that the sun emits rays similar in type to the alpha and beta rays. A Brief Account of Radio-activity Those falling in the other direction are the beta rays. The War Terror |
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