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Update physical constants to CODATA 2018

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Paul Romano 2019-11-11 15:39:16 -06:00
parent fd40a874cc
commit 03244d755f
2 changed files with 15 additions and 15 deletions
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openmc/data/data.py
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@ -178,20 +178,20 @@ ATOMIC_SYMBOL = {0: 'n', 1: 'H', 2: 'He', 3: 'Li', 4: 'Be', 5: 'B', 6: 'C',
ATOMIC_NUMBER = {value: key for key, value in ATOMIC_SYMBOL.items()}
# Values here are from the Committee on Data for Science and Technology
# (CODATA) 2014 recommendation (doi:10.1103/RevModPhys.88.035009).
# (CODATA) 2018 recommendation (https://physics.nist.gov/cuu/Constants/).
# The value of the Boltzman constant in units of eV / K
K_BOLTZMANN = 8.6173303e-5
K_BOLTZMANN = 8.617333262e-5
# Unit conversions
EV_PER_MEV = 1.0e6
JOULE_PER_EV = 1.6021766208e-19
JOULE_PER_EV = 1.602176634e-19
# Avogadro's constant
AVOGADRO = 6.022140857e23
AVOGADRO = 6.02214076e23
# Neutron mass in units of amu
NEUTRON_MASS = 1.00866491588
NEUTRON_MASS = 1.00866491595
# Used in atomic_mass function as a cache
_ATOMIC_MASS = {}