constants.hpp File Reference

Physical, mathematical and miscellaneous constants used in alma. More...

#include <cmath>
#include <complex>

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Functions
constexpr std::complex< double >	alma::constants::imud (0.0, 1.0)
	Imaginary unit in double precision.

Variables
constexpr double	alma::constants::amu = 1.660538921e-27
	Atomic mass unit, kg.
constexpr double	alma::constants::e = 1.602176565e-19
	Atomic unit of charge, C.
constexpr double	alma::constants::a0 = 0.52917721092e-10
	Bohr radius, m.
constexpr double	alma::constants::NA = 6.02214129e23
	Avogadro constant, mol^{-1}.
constexpr double	alma::constants::kB = 1.3806488e-23
	Boltzmann constant, J / K.
constexpr double	alma::constants::epsilon0 = 8.854187817e-12
	Electric constant, F / m.
constexpr double	alma::constants::me = 9.10938291e-31
	Electron mass, kg.
constexpr double	alma::constants::mu0 = 12.566370614e-7
	Magnetic constant, Wb.
constexpr double	alma::constants::h = 6.62606957e-34
	Planck constant, J s.
constexpr double	alma::constants::hbar = 1.054571726e-34
	Dirac constant, J s.
constexpr double	alma::constants::c = 299792458.
	Speed of light in vacuum, m/s.
constexpr double	alma::constants::pi = 3.1415926535897932384626433832795028841953
	Value of pi (to 128 bits)
constexpr char	alma::constants::alphabet [] = "abcdefghijklmnopqrstuwxyz"
	Lower-case English alphabet.
constexpr double	alma::constants::nsigma = 2.828427124746190097603377448419396157138
	A Gaussian PDF is considered to be zero at any point beyond nsigma standard deviations from its mean. More...

Detailed Description

Physical, mathematical and miscellaneous constants used in alma.

Values taken from http://physics.nist.gov/cuu/Constants/Table/allascii.txt .

Variable Documentation

nsigma

constexpr double alma::constants::nsigma = 2.828427124746190097603377448419396157138

A Gaussian PDF is considered to be zero at any point beyond nsigma standard deviations from its mean.