正电子

正電子

zhèngdiànzǐ

noun #31,195

Meanings

1 positron (the antiparticle of the electron)
2 positively-charged electron

Characters

positive, correct

(suffix) particle, small thing

Examples

HSK 7-9

正电子是电子的反粒子。

Zhèngdiànzǐ shì diànzǐ de fǎn lìzǐ.

The positron is the antiparticle of the electron.

HSK 7-9

正电子发射断层扫描简称PET。

Zhèngdiànzǐ fāshè duàncéng sǎomiáo jiǎnchēng PET.

Positron emission tomography is abbreviated PET.

Tips

usage

Built from 正 'positive' + 电子 'electron' = 'positive electron'. Compare 反质子 'antiproton' and 中微子 'neutrino'. Predicted by Dirac in 1928, confirmed by Anderson in 1932 - the first antiparticle ever observed.

Stroke Order

正 zhèng

电 diàn

子 zǐ