physical_constants.f90 Source File

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! This file is part of ReMKiT1D.
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! published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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! Copyright 2023 United Kingdom Atomic Energy Authority (stefan.mijin@ukaea.uk)
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module physical_constants
    !! Houses some useful physical/mathematical constants

    use data_kinds  ,only: rk, ik

    real(rk), parameter :: pi         = 4.d0 * atan(1.d0)
    real(rk), parameter :: epsilon0   = 8.854188d-12            !! Vacuum permittivity 
    real(rk), parameter :: elMass     = 9.10938d-31             !! Electron mass 
    real(rk), parameter :: elCharge   = 1.60218d-19             !! Electron charge 
    real(rk), parameter :: bohrRadius = 5.291772d-11 
    real(rk), parameter :: hPlanck    = 6.62607004d-34 
    real(rk), parameter :: mu0        = 4.00D00 * pi * 1d-17    !! Vacuum permeability
    real(rk), parameter :: protonMass = 1.67262d-27
    real(rk), parameter :: amu        = 1.6605390666d-27        !! Atomic mass unit
 
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end module physical_constants
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