- There are many other specific µSR techniques
with their own acronyms.
This link shows my "official" approved list.
(There is also an
old funky version).
- I have also proposed a convention for labelling
the 3-D coordinate system
(also available in a clean GIF)
for µSR experiments with surface muons,
which can be transmitted through a
made from a "DC separator"
(also known as a Wien filter)
to rotate the muon spins until they are perpendicular to
their momenta. (This is essential for injecting the
muons into strong transverse magnetic fields.)
- The basic method
most commonly employed in µSR
is shown here in a grossly oversimplified cartoon version.
- The above cartoon describes time-differential
or TD-µSR, which comes in several flavours:
- Here you can see transverse field
(TF)-µSR in a bit more detail.
- This sketch shows the two typical
- This one shows zero and longitudinal field
(ZF and LF) µSR.
- There are also a number of techniques
based on time-Integral or I-µSR methods.
- The basics of I-µSR
are explained here
some rather atypical results are shown
- One of the more useful branches of I-µSR
is based on avoided level-crossing resonance (ALCR),
which in turn comes in (at least) two flavours:
- Quadrupolar ALCR occurs
when the muon's Zeeman splitting is degenerate with a
splitting between electric quadrupole energy levels of
a nearby nucleus. It has been used to determine the muon site
in several crystals.
- Paramagnetic ALCR occurs
when two energy levels of a µ-e-nucleus 3-spin
system with opposite muon spins are degenerate.
It is widely used to study muonium states in semiconductors
and radicals (paramagnetic molecules) formed by
chemical addition of Mu to (e.g.) unsaturated
bonds of organic molecules.
Jess H. Brewer
Last modified: Fri Dec 5 11:39:15 EST