Value for proton mass energy equivalent in MeV
type: ConstantValue
has unit: MegaEV
informative reference: http://physics.nist.gov/cuu/Constants/bibliography.html
standard uncertainty: 0.000023
standard uncertainty SN: 2.3E-5
value: 938.272013
value SN: 9.38272013E2
website: http://physics.nist.gov/cgi-bin/cuu/Value#mid