# Neutron Constants

### - table or chart of neutron constants including symbol, value and units for values such as neutron mass, neutron-electron mass ratio, neutron molar mass, etc..

### In this section

Neutron constants are used in many areas of science and electronics for a variety of calculations.

The neutron constants that come under the universal constants heading include items such as the neutron mass, neutron-electron mass ratio, neutron molar mass, etc..

Details for these neutron constants and more are given below. The constant name, symbol, value, units and the relative uncertainty are provided.

Constant name | Symbol of constant | Value | Units | Relative Uncertainty |
---|---|---|---|---|

Neutron mass | Mp |
1.674 928 6 | 10^-27 kg |
0.59 |

Neutron mass in electron volts | |
939.565 63 | MeV |
0.30 |

Neutron-electron mass ratio | mn/me |
1838.683 662 | |
0.022 |

Neutron proton mass ratio | mn/mp |
1.001 378 404 | |
0.009 |

Neutron molar mass | Mn |
1.008 664 904 | 10^-3 kg/mol |
0.014 |

Neutron Crompton wavelength | λcn |
1.319 591 | 10^-15m |
0.014 |

Neutron magnetic moment | µn |
0.996 237 07 | 10^-26 J T^-1 |
0.41 |

Neutron electron magnetic moment ratio | µn/µe |
1.040 668 82 | 10^-3 |
0.24 |

Neutron proton magnetic moment ratio | µn/µp |
0.684 979 34 | |
0.24 |

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