This is the universal constant representing the ratio of the electron's mass to themas of an alpha particle.

Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. They are generally produced in the process of alpha decay, but may also be produced in other ways. Alpha particles are named after the first letter in the Greek alphabet, `alpha`

author: TeddyCamalus

Notes

This constant is specified with a standard uncertainty (standard deviation) of: 0.000 000 000 55 E-4