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Combined effects of several polarisation mechanisms

1 Generalised formalism for the scattering of polarised electrons by unpolarised targets [Pg.241]

We will again work in the collision system where the z-axis of quantisation is parallel to ko and the scattering plane is the zx-plane (see fig. 8.1). We can write the density matrix (Blum, 1981) for the final state as [Pg.241]

For spin 1/2 particles there are 16 possible combinations of (v-VoVjVo) and therefore 32 real (or 16 complex) parameters. From (9.14) it can be seen that hermiticity requires that [Pg.241]

Reflection invariance with respect to the scattering plane (i.e. parity conservation) yields the further restriction that [Pg.242]

15) and (9.17), which correspond to (8.14) and (8.15), restrict the number of parameters so that only eight independent parameters are required to characterise in general the reduced density matrix of the scattered electrons. In special situations the number of independent parameters can be reduced even further as discussed earlier. [Pg.242]


See other pages where Combined effects of several polarisation mechanisms is mentioned: [Pg.241]    [Pg.241]    [Pg.243]    [Pg.245]   


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Combinations of effects

Combined effect

Combined mechanisms

Combined severity

Polarisability

Polarisability effective

Polarisable

Polarisation

Polarisation combined mechanisms

Polarisation effect

Polariser

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