物理定数および単位変換

物理定数や単位変換する際の数値の参照用．

例えば， Ry to eV の値が 13.6… ならば 1 Ry = 13.6… eV の意味．
プログラミングの際，コピペして使えるように．

エネルギー

Ry to eV

ry2ev = 13.605693122994

Ref: NIST, CODATA 2018

Hartree to eV

hrt2ev = 27.211386245988

Ref: NIST, CODATA 2018

eV to J

ev2j = 1.602176634e-19

Ref: NIST, CODATA 2018

J to eV

j2eV = 6.241509074e+18

Ref: NIST, CODATA 2018

長さ

Bohr to Å

bohr2ang = 0.529177210903

Ref: NIST, CODATA 2018

Å to Bohr

ang2bohr = 1.88972612463

圧力

kbar to eV/(Å**3)

kbar2ev_ang3 = 0.0006241509073