| 释义 |
▪ I. selectron|sɪˈlɛktrɒn|
Also Selectron.
[f. select v. + -tron.]
A kind of cathode-ray tube formerly used in computers as a means of storing digital information.
1947Math. Tables & Other Aids to Computation II. 229 ‘The selectron—a tube for selective electrostatic storage’ by Dr. Jan Rajchman. 1947[see instruction 4 c]. 1950W. W. Stifler High-Speed Computing Devices xiv. 370 The Selectron utilizes the fact that an insulated secondary-electron emitter can be made to ‘float’ at either of two stable potentials. 1957R. K. Richards Digital Computer Components & Circuits vi. 265 Among the more important forms of electrostatic storage are the ‘Williams tube’, the ‘barrier-grid tube’, the ‘holding-gun tube’, and the Selectron, each of which has at one time or another been successfully used in a digital computer.
▪ II. selectron, n.2 Particle Physics.|sɪˈlɛktrɒn|
[f. super- + electron n.]
The supersymmetric counterpart of the electron, with spin 0 instead of ½.
1982Physics Lett. B. CXVI. 280/1 The selectron decays very rapidly to an electron and a photino. 1984Times 16 Feb. 10/5 In the case of the electron, the supersymmetric version, the ‘selectron’ would have the same electromagnetic properties, but unlike the electron would have zero spin. 1985Nature 3 Jan. 9/1 Superelectrons (selectrons) would have Bose statistics, while superphotons (photinos) would be fermions. 1986New Scientist 2 Jan. 26/1 The theory of supersymmetry predicts that the electron should have a partner called the selectron, but the theory does not give the selectron's mass. |