| 释义 |
positon Physics.|ˈpɒzɪtɒn|
[f. positive a. and n. + -on1.]
†a. Proposed as an alternative name for the proton. Obs. rare—1.
b. [a. G. positon (P. Gruner 1935, in Helvetica Physica Acta VIII. 326.] = positron.
1928[see negaton]. 1937Chem. Abstr. XXXI. 2917/1 The following names are proposed for corpuscles of mass approx. 10-27 g. (present names in parentheses): nulliton (neutrino), positon (positron), negaton (electron). 1938, etc. [see negaton]. 1952B. Rossi High-Energy Particles i. 2 Positive electrons (or positons) are identical to negatons, except for their opposite sign of charge. 1956Nuclear Physics I. 72 The word ‘electron’ applies to particles with an elementary charge of either sign. When it is desirable to emphasize the sign of the charge, the words ‘positon’ and ‘negaton’ are used. Thus the illogical phrase ‘electron-positron pair’ is replaced by ‘electron pair’, or..‘positon-negaton pair’. 1960Ibid. XVI. 683 (heading) Branching ratios of K capture to positon emission in non-unique first forbidden 2- → 2+ beta transitions. 1974Ibid. A. CXXXII. 230 (heading) Electron capture to positon decay ratios and second-class currents. |