positron emission

(redirected from Positron decay)

positron emission

[′päz·ə‚trän i‚mish·ən]
(nuclear physics)
A β-decay process in which a nucleus ejects a positron and a neutrino.
References in periodicals archive ?
Comparison of the time spectra of positron decay revealed that in natural neon (composition 1) the shoulder is fuzzy, while in neon poor in [sup.
I then chose three species, 3H (a pure beta emitter with no gammas), 18F and 22Na (both of which decay by both electron capture and positron emission) and was somewhat surprised to see them as having no betas or, in the case of the latter two, as undergoing electron capture with no mention of positron decay.
A, B, and C are zero time intercepts of the three curves that comprise three modes of positron decay, and represent the number of positrons annihilated by each decay mode, respectively.
Comparison of temporal spectra of positron decay revealed: in natural neon (the 1st composition) the shoulder is fuzzy, while in neon poor with [sup.