In some kinds of beta decay, a nuclide loses surplus positive charge by emitting a positron (in the same event, a proton becomes a neutron, and neutrinos are also given off).
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释义
以某种贝它衰减,一个核素靠发出一个正电子失去剩余正电荷(在相同的事件中,一个质子变成一个中子,而且也发射微中子)。
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