Objects Mixture Species <Prev Next>

Molecule

There can be one or more molecules within each species; there should be one molecule for each isotopomer. To add another molecule, either:
  1. Right-click on the species you are adding to in the tree view and select "Add new...", then select a linear, symmetric top or asymmetric top molecule
  2. Right click on a similar molecule entry (it must be of the same type) and select "copy", then right click where you want the new molecule to be and select paste.
The latter method is particularly effective for adding another isotope as the parameters and settings will be largely similar. Note that it is possible to copy and paste between independent copies of PGOPHER should you want to use a molecule from a completely different file as a starting point. 

The settings given here are common to all different types of mixture.  Details of other settings are given in the sections for linear, symmetric top, asymmetric top and vibrating molecules.

Settings

nNuclei Number of nuclei to calculate hyperfine structure for. Leave this at 0 unless you want the hyperfine structure resolved.
Jmin Minimum J to use in calculation - set to -1 (default) to use value from species.
Jmax Maximum J to use in calculation - set to -1 (default) to use value from species.
Colour Colour - set to "None" to take value from elsewhere as explained in Determining Colours and J ranges.
JAdjustSym If set, energy level plots and Fortrat diagrams will take account of the alternation in symmetry with J that is often found. For example in linear molecules an energy level will typically alternate between + and - parity with J (hence the e/f notation).
BlockMatrix Set to force check of Hamiltonian matrix for factorization into blocks before diagonalization. If blocks are found, these are diagonalized separately, ensuring states that have no connecting matrix elements are not accidentally mixed if the eigenvalues happen to be very close. In principle, if full use is made of symmetry and states are separated into separate manifolds as appropriate, this should not be necessary but can easily happen if selected terms in the Hamiltonian are zero or interactions between states are omitted.

Parameters

Abundance Abundance of this isotope; default is 1