pynucastro.constants package

Fundamental constants in CGS (unless otherwise noted)

Submodules

pynucastro.constants.constants module

Fundamental constants used throughout pynucastro. Most of these come from scipy.constants.

pynucastro.constants.constants.MeV2erg = 1.6021766339999998e-06

conversion factor from MeV to erg

pynucastro.constants.constants.N_A = 6.02214076e+23

Avogadro’s number

pynucastro.constants.constants.c_light = 29979245800.0

speed of light in cm / s

pynucastro.constants.constants.erg2MeV = 624150.9074460763

conversion factor from erg to MeV

pynucastro.constants.constants.h = 6.62607015e-27

Planck constant in erg s

pynucastro.constants.constants.hbar = 1.0545718176461565e-27

Planck constant / 2 pi in erg s

pynucastro.constants.constants.k = 1.3806490000000002e-16

Boltzmann constant in erg/K

pynucastro.constants.constants.k_MeV = 8.61733326214518e-11

Boltzmann constant in MeV/K

pynucastro.constants.constants.m_e = 9.1093837139e-28

electron mass in g

pynucastro.constants.constants.m_e_MeV = 0.51099895069

electron mass in MeV

pynucastro.constants.constants.m_n = 1.6749275005600003e-24

neutron mass in g

pynucastro.constants.constants.m_n_C18 = 1.67492749804e-24

neutron mass in g from CODATA 2018

pynucastro.constants.constants.m_n_MeV = 939.56542194

neutron mass in MeV

pynucastro.constants.constants.m_n_MeV_C18 = 939.56542052

neutron mass in MeV from CODATA 2018

pynucastro.constants.constants.m_p = 1.67262192595e-24

proton mass in g

pynucastro.constants.constants.m_p_MeV = 938.27208943

proton mass in MeV

pynucastro.constants.constants.m_u = 1.66053906892e-24

atomic mass unit in g

pynucastro.constants.constants.m_u_C18 = 1.6605390666e-24

atomic mass unit in g from CODATA 2018

pynucastro.constants.constants.m_u_MeV = 931.49410372

atomic mass unit in MeV

pynucastro.constants.constants.m_u_MeV_C18 = 931.49410242

atomic mass unit in MeV from CODATA 2018

pynucastro.constants.constants.q_e = 4.803204712570263e-10

elementary charge in stat-Coulomb