Hyperfine course

quick start
2 Topics
practical info
about you
the nucleus
7 Topics
nuclear properties
multipole moments
nuclear moment tabulation
multipole radiation
(optional) why are odd electric moments zero?
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webinar (w1)
framework
6 Topics
VIP-1
gravitational analogue
double ring
quantum multipole expansion
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electric monopole shift
5 Topics
overview framework
expression and physics
toy model
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magnetic hyperfine interaction
6 Topics
overview framework
in free atoms
in solids
overlap contribution
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electric quadrupole interaction
8 Topics
overview framework
from toy model to quantum
quadrupole operator
case studies / symmetry
miscellaneous topics
(optional) quadrupole shifts
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classification of methods
2 Topics
summary of what came before
from VIP1 to VIP2
laser spectroscopy
4 Topics
short overview classification
laser spectroscopy
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Mössbauer spectroscopy
7 Topics
short overview classification
recoil, linewidth, resonant scattering
realizing nuclear resonant scattering
Mössbauer spectroscopy
miscellaneous Mössbauer topics
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synchrotron methods
8 Topics
short overview classification
short overview Mössbauer
synchrotron radiation facilities
nuclear resonant scattering
nuclear inelastic scattering
(optional) synchrotron Mössbauer spectroscopy at extreme conditions
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NMR & NQR
7 Topics
short overview classification
orientation of a nuclear ensemble
orientation: temperature and radiation
NMR and NQR
reading task NMR/NQR
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EPR
7 Topics
short overview classification
EPR on free atoms
EPR on molecules and crystals
ENDOR
(optional) conference talk
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LTNO & NMR/ON
7 Topics
short overview: classification
short overview: orientation of a nuclear ensemble
short overview: orientation – temperature and radiation
low-temperature nuclear orientation
NMR/ON
(optional) the dilution refridgerator
(optional) two conference talks
PAC
5 Topics
short overview classification
perturbed angular correlation spectroscopy
(optional) an application of PAC
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μSR (optional)
2 Topics
short overview classification
μSR
refreshers
7 Topics
tensors : several introductions
spin : an intuitive picture
perturbation theory
the g-factor
double split experiment
amplitude, probability, intensity
course summaries
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perturbed angular correlation spectroscopy

Hyperfine course PAC perturbed angular correlation spectroscopy

The need of having to go to milli-Kelvin temperatures is a disadvantage of LTNO and NMR/ON. Can we exploit the advantages of a strongly oriented ensemble of nuclei while staying at room temperature (or even above, when heating)? The answer is ‘yes’, and an experimental method doing this is Perturbed Angular Correlation spectroscopy (PAC).

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There are two tasks related to this video:

(1) For a PAC experiment in a situation without hyperfine interaction, this is what will be measured in two different detector combinations:

Answer the following questions in the forum :
1-a) Why do you observe an exponential decay ?
1-b) Why is the number of events/counts for detector combination 1-2 smaller than for 1-3 ?

(2) Describe how the oscillating function would look like in the two limiting cases of a PAC experiment for an extremely small hyperfine interaction and an extremely large hyperfine interaction ? Why would it become impossible to determine the frequency in such an experiment ?

Expected time: 1h00 minutes (report)

B11-05

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