redefine (physical) constants

[nbc12]

There seems to be one more. According to https://physics.nist.gov/cgi-bin/cuu/Value?e,

Code:

const mksa_unit __qe_unit={1.60217733e-19,0,0,1,1,0,0,0};

should be

Code:

const mksa_unit __qe_unit={1.602176634e-19,0,0,1,1,0,0,0};

Since the conversion between Joule and eV depends on the fundamental charge, maybe it would be easier to set the value of __qe_unit to be __eV_unit or vice versa?