Timeline for How long does a positron last in the Sun's core?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 2, 2020 at 14:16 | vote | accept | Emilio Pisanty | ||
| Aug 21, 2016 at 22:11 | comment | added | Lawrence B. Crowell | I would say that for energy in the classical to semi-relativistic domain that is would work. The temperatures in the sun are $10^7K$, which corresponds to energy $E~\sim~10^2$ to $10^3eV$. This is far lower than the mass energy of the electron/positron, and corresponds to a $\gamma~\sim~1.002$ or velocity $v~\sim~.1c$. | |
| Aug 21, 2016 at 19:24 | comment | added | Emilio Pisanty | Can you provide more information on why $\sigma \sim r_\mathrm{cl}^2$ is a good approximation to the annihilation cross-section? | |
| Aug 21, 2016 at 18:55 | history | answered | Lawrence B. Crowell | CC BY-SA 3.0 |