openmc.stats.Watt¶

class openmc.stats.Watt(a=988000.0, b=2.249e-06)[source]¶

Watt fission energy spectrum.

The Watt fission energy spectrum is characterized by two parameters \(a\) and \(b\) and has density function \(p(E) dE = c e^{-E/a} \sinh \sqrt{b \, E} dE\).

Parameters:	a (float) – First parameter of distribution in units of eV b (float) – Second parameter of distribution in units of 1/eV
Variables:	a (float) – First parameter of distribution in units of eV b (float) – Second parameter of distribution in units of 1/eV

classmethod from_xml_element(elem)[source]¶

Generate Watt distribution from an XML element

Parameters:	elem (xml.etree.ElementTree.Element) – XML element
Returns:	Watt distribution generated from XML element
Return type:	openmc.stats.Watt

to_xml_element(element_name)[source]¶

Return XML representation of the Watt distribution

Parameters:	element_name (str) – XML element name
Returns:	element – XML element containing Watt distribution data
Return type:	xml.etree.ElementTree.Element