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IEVref: | 113-06-30 | ID: | |

Language: | en | Status: Standard | |

Term: | Richardson constant | ||

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Definition: | parameter of the law J = A T ^{2} exp(−Φ / k T ) expressing the thermionic emission current density J for a metal in terms of thermodynamic temperature T and work function Φ, where k is Boltzmann constantNOTE The coherent SI unit of Richardson constant is ampere per square metre kelvin squared, A / (m | ||

Publication date: | 2011-04 | ||

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Internal notes: | 2017-06-02: Cleanup - Remove Attached Image 113-06-30en.gif 2021-03-11: Second exponent "2" in "<i>J</i> = <i>A T</i> <sup>2</sup>exp(−<i>Φ</i> / <i>k T</i> <sup>2</sup>)" deleted since incorrect. Error in the published standard. Validated by TC 1 MT 100 Convenor. JGO | ||

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NOTE The coherent SI unit of Richardson constant is ampere per square metre kelvin squared, A / (m^{2} ⋅ K^{2}).