Issue |
Europhys. Lett.
Volume 66, Number 2, April 2004
|
|
---|---|---|
Page(s) | 164 - 170 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2003-10202-4 | |
Published online | 01 April 2004 |
Observation of
-periodicity of the spinor using neutron
resonance interferometry
1
Interfacultair Reactor Instituut TU Delft - Mekelweg 15, 2629 JB Delft, Netherlands
2
Petersburg Nuclear Physics Institute - Gatchina 188350, Russia
Received:
12
November
2003
Accepted:
13
February
2004
A polarised neutron beam is passed through a gradient resonance
flipper. By the amplitude of their RF field, such flippers can be
set at flip probability , 1, or
. At
, the neutron wave splits into a flipped and a
non-flipped part with different precession. We measure the
polarisation after a spin-echo (SE) setup with each precession arm
made up of 2 such flippers. Offset from SE is made by varying the
static fields in one flipper while the other flippers stay
unchanged. This shows up as a periodic behaviour of the
polarisation. With incoming polarisation parallel to the static
field in the flippers —set at
— this period
is twice the period measured for both
and 1 and with
polarisation perpendicular to the static field. In the latter
experiments both components of the spinor are affected, whereas in
the former experiment we create spin states in which only one
spinor component in one state is affected. Hence, this experiment
demonstrates explicitly the
-periodicity of the spinor.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 03.75.Dg – Atom and neutron interferometry / 61.12.Ld – Neutron diffraction
© EDP Sciences, 2004
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