UnitConv__conversions_8hpp_source.html

#pragma once

#include "Physics/PhysConst_constants.hpp"


namespace UnitConv {


constexpr double Energy_au_to_keV = PhysConst::Hartree_eV / 1.0e3;

constexpr double Energy_keV_to_au = 1.0 / Energy_au_to_keV;

constexpr double Energy_invcm_to_au = 1.0 / PhysConst::Hartree_invcm;


constexpr double Momentum_au_to_MeV =

    PhysConst::Hartree_eV / PhysConst::alpha / 1.0e6;

constexpr double Momentum_MeV_to_au = 1.0 / Momentum_au_to_MeV;


constexpr double Mass_au_to_GeV = PhysConst::m_e_MeV / 1000.0;

constexpr double Mass_au_to_MeV = PhysConst::m_e_MeV;

constexpr double Mass_GeV_to_au = 1.0 / Mass_au_to_GeV;

constexpr double Mass_MeV_to_au = 1.0 / Mass_au_to_MeV;


constexpr double Velocity_au_to_kms = (PhysConst::c_SI / PhysConst::c) / 1.0e3;

constexpr double Velocity_au_to_cms =

    (PhysConst::c_SI / PhysConst::alpha) * 100.;

constexpr double Velocity_au_to_cmday =

    Velocity_au_to_cms * (24.0 * 60.0 * 60.0);


constexpr double AtomicMass_u_to_kg = PhysConst::u_NMU * PhysConst::m_e_kg;


} // namespace UnitConv

PhysConst::Hartree_invcm
constexpr double Hartree_invcm
Hartree to cm^-1 conversion [wave-number, inverse cm]:
Definition PhysConst_constants.hpp:87

PhysConst::Hartree_eV
constexpr double Hartree_eV
Hartree (atomic energy unit = 2Ry) in eV, 27.211 386 245 981(30) eV [CODATA 2022].
Definition PhysConst_constants.hpp:51

PhysConst::alpha
constexpr double alpha
Fine-structure constant: alpha = 1/137.035 999 177(21) [CODATA 2022].
Definition PhysConst_constants.hpp:24

PhysConst::m_e_kg
constexpr double m_e_kg
electron mass, in SI (kg)
Definition PhysConst_constants.hpp:33

PhysConst::m_e_MeV
constexpr double m_e_MeV
Electron mass (MeV/c^2)
Definition PhysConst_constants.hpp:70

PhysConst::u_NMU
constexpr double u_NMU
unified atomic mass unit; (nuclear mass unit, Dalton): au
Definition PhysConst_constants.hpp:73

PhysConst::c_SI
constexpr double c_SI
c, speed of light: 299 792 458 m/s [exact]
Definition PhysConst_constants.hpp:12

PhysConst::c
constexpr double c
speed of light in a.u. (=1/alpha)
Definition PhysConst_constants.hpp:63