| 单词 | positive electron |
| 释义 | > as lemmaspositive electron positive electron n. Physics a subatomic particle analogous to an electron but having a positive charge (now identified with a positron). ΘΚΠ the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > positive electron E1894 positive electron1899 positron1933 positon1937 1899 W. Sutherland in London, Edinb., & Dublin Philos. Mag. 5th Ser. 47 273 In æther showing no electric charge each negative electron is united with a positive electron to form the analogue of a material molecule. 1902 Nature 18 Sept. 488 The conception..that the ultimate atoms of matter involve positive and negative electrons. 1932 Science 9 Sept. 238/1 Up to the present a positive electron has always been found with an associated mass 1,850 times that associated with the negative electron. 1936 S. Glasstone Recent Adv. Gen. Chem. i. 13 Anderson..obtained the first definite evidence for the existence of the positive electron, now generally called the ‘positron’. 1980 D. Wilkinson in B. Dixon From Creation to Chaos (1993) 322 Very occasionally one of those protons..transforms itself through the weak force into a neutron, emitting a positive electron (the antiparticle of the more familiar negative electron). < as lemmas |
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