`BareHyperfine`

class nexus.BareHyperfine(weight=0.0, isomer=0.0, magnetic_field=0.0, magnetic_theta=0.0, magnetic_phi=0.0, quadrupole=0.0, quadrupole_alpha=0.0, quadrupole_beta=0.0, quadrupole_gamma=0.0, quadrupole_asymmetry=0.0, texture=1.0, lamb_moessbauer=0.0, broadening=1.0, isotropic=False)

Constructor for BareHyperfine class. This class is only used for calculations of the nuclear Hamiltonian. Defines a set of hyperfine parameters acting on a Moessbauer isotope. Angles are input in degree but internally stored in radian.

Parameters:

weight (float) – Relative weight of the site, > 0.
isomer (float) – Isomer shift (mm/s).
magnetic_field (float) – Magnetic hyperfine field amplitude (Tesla).
magnetic_theta (float) – Polar angle of the magnetic field with respect to the beam propagation direction - photon \(k\) vector (degree).
magnetic_phi (float) – Azimuthal angle of the magnetic field with respect to the \(sigma\) direction of the beam (degree).
quadrupole (float) – Quadrupole splitting amplitude (mm/s).
quadrupole_alpha (float) – Euler angle of the electric field gradient \(\alpha\) in extrinsic ZYZ convention (degree).
quadrupole_beta (float) – Euler angle of the electric field gradient \(\beta\) in extrinsic ZYZ convention (degree).
quadrupole_gamma (float) – Euler angle of the electric field gradient \(\gamma\) in extrinsic ZYZ convention (degree).
quadrupole_asymmetry (float) – Asymmetry parameter of the electric field gradient, 0 to 1.
isotropic (bool) – If True the hyperfine site is set to 3D random distribution in both magnetic field and quadrupole splitting.
texture (float) –
Texture coefficient between 0 and 1.

Added in version 1.2.0.
lamb_moessbauer (float) –
Lamb-Moessbauer factor of the hyperfine site.

Added in version 1.2.0.
broadening (float) –
Broadening parameter of the site. It multiplies with the linewidth.

Added in version 1.2.0.

weight

Relative weight of the site, > 0.

Type:: float

isomer

Isomer shift (mm/s).

Type:: float

magnetic_field

Magnetic hyperfine field amplitude (Tesla).

Type:: float

magnetic_theta

Polar angle of the magnetic field with respect to the beam propagation direction - photon \(k\) vector (rad).

Type:: float

magnetic_phi

Azimuthal angle of the magnetic field with respect to the \(sigma\) direction of the beam (rad).

Type:: float

quadrupole

Quadrupole splitting amplitude (mm/s).

Type:: float

quadrupole_alpha

Euler angle of the electric field gradient \(\alpha\) in extrinsic ZYZ convention (rad).

Type:: float

quadrupole_beta

Euler angle of the electric field gradient \(\beta\) in extrinsic ZYZ convention (rad).

Type:: float

quadrupole_gamma

Euler angle of the electric field gradient \(\gamma\) in extrinsic ZYZ convention (rad).

Type:: float

quadrupole_asymmetry

Asymmetry parameter of the electric field gradient, 0 to 1.

Type:: float

isotropic

If True the hyperfine site is set to 3D random distribution in both magnetic field and quadrupole splitting.

Type:: bool

texture

Texture coefficient between 0 and 1. If isotropic is True it is not taken into account.

Added in version 1.2.0.

Type:: float

lamb_moessbauer

Lamb-Moessbauer factor of the hyperfine site. Not used if the lamb_moessbauer of the material is None.

Added in version 1.2.0.

Type:: float

broadening

Broadening parameter of the site. It multiplies with the linewidth.

Added in version 1.2.0.

Type:: float

class nexus.VectorBareHyperfine(*args): List of BareHyperfine objects.

Examples

Define a BareHyperfine object.

site = nx.BareHyperfine(
  weight = 1,
  isomer = -0.11,
  magnetic_field = 0,
  magnetic_theta = 0,
  magnetic_phi = 45,
  quadrupole = 0.8,
  quadrupole_alpha = 90,
  quadrupole_beta = 45,
  quadrupole_gamma = 0,
  quadrupole_asymmetry = 0.05,
  isotropic = False
  )

BareHyperfine

`BareHyperfine`