openmc.stats.SphericalIndependent

class openmc.stats.SphericalIndependent(r, cos_theta, phi, origin=(0.0, 0.0, 0.0))

Spatial distribution represented in spherical coordinates.

This distribution allows one to specify coordinates whose \(r\), \(\theta\), and \(\phi\) components are sampled independently from one another and centered on the coordinates (x0, y0, z0).

New in version 0.12.

Changed in version 0.13.1: Accepts cos_theta instead of theta

Parameters

• r (openmc.stats.Univariate) – Distribution of r-coordinates in a reference frame specified by the origin parameter

• cos_theta (openmc.stats.Univariate) – Distribution of the cosine of the theta-coordinates (angle relative to the z-axis) in a reference frame specified by the origin parameter

• phi (openmc.stats.Univariate) – Distribution of phi-coordinates (azimuthal angle) in a reference frame specified by the origin parameter

• origin (Iterable of float, optional) – coordinates (x0, y0, z0) of the center of the spherical reference frame for the source. Defaults to (0.0, 0.0, 0.0)

Variables

• r (openmc.stats.Univariate) – Distribution of r-coordinates in the local reference frame

• cos_theta (openmc.stats.Univariate) – Distribution of the cosine of the theta-coordinates (angle relative to the z-axis) in the local reference frame

• phi (openmc.stats.Univariate) – Distribution of phi-coordinates (azimuthal angle) in the local reference frame

• origin (Iterable of float, optional) – coordinates (x0, y0, z0) of the center of the spherical reference frame. Defaults to (0.0, 0.0, 0.0)

classmethod from_xml_element(elem: Element)

Generate spatial distribution from an XML element

Parameters

elem (lxml.etree._Element) – XML element

Returns

Spatial distribution generated from XML element

Return type

openmc.stats.SphericalIndependent

to_xml_element()

Return XML representation of the spatial distribution

Returns

element – XML element containing spatial distribution data

Return type

lxml.etree._Element