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Core-and-shell particle

To construct a particle made of a core and a shell, use

composite_particle = ba.CoreAndShell(core, shell)

where core and shell typically are simple particles generated by the Particle constructor.

Adjust the internal positions of the core and shell with a prior call:

core.translate(core_position)
shell.translate(shell_position)

The composite_particle can also be translated as a whole.

Note that core must be fully contained in shell. The scattering is computed as the coherent sum of the scattering from shell and core where the scattering power of the latter has been modified by subtracting the scattering power of the shell material.

History

Prior to BornAgain 1.19.80, the constructor ParticleCoreShell had the opposite argument order, namely (shell, core).

Example

See Core-and-shell example. Validated through an alternative implementation that uses particle composition, Examples/scatter2d/CoreShellNanoparticles2.py .