Helion (chemistry)
A helion (symbol h) is the
stable isotope of helium, helium-4, consisting of two protons and two neutrons, is called an alpha particle
or an alpha for short.
This particle is the daughter product in the beta-minus decay of tritium, an isotope of hydrogen:
CODATA reports the mass of a helion particle as mh = 5.0064127796(15)×10−27 kg[1] = 3.014932247175(97) Da.[2]
Helions are intermediate products in the
proton–proton chain reaction in stellar fusion
.
An antihelion is the
antiprotons and an antineutron
.
References
- ^ "2018 CODATA Value: helion mass". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2022-09-11.
- ^ "2018 CODATA Value: helion mass in u". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2022-09-11.
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