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Perturbed angular correlation information


Nuclear probe in a lattice.
Schema of PAC-Spectroscopy

The perturbed γ-γ angular correlation, PAC for short or PAC-Spectroscopy, is a method of nuclear solid-state physics with which magnetic and electric fields in crystal structures can be measured. In doing so, electrical field gradients and the Larmor frequency in magnetic fields as well as dynamic effects are determined. With this very sensitive method, which requires only about 10–1000 billion atoms of a radioactive isotope per measurement, material properties in the local structure, phase transitions, magnetism and diffusion can be investigated. The PAC method is related to nuclear magnetic resonance and the Mössbauer effect, but shows no signal attenuation at very high temperatures. Today only the time-differential perturbed angular correlation (TDPAC) is used.

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Perturbed angular correlation

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The perturbed γ-γ angular correlation, PAC for short or PAC-Spectroscopy, is a method of nuclear solid-state physics with which magnetic and electric...

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Density functional theory

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electron correlation. Since, DFT has become an important tool for methods of nuclear spectroscopy such as Mössbauer spectroscopy or perturbed angular correlation...

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Hans Frauenfelder

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American physicist and biophysicist notable for his discovery of perturbed angular correlation (PAC) in 1951. In the modern day, PAC spectroscopy is widely...

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PAC

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Computer appliance Proxy auto-config, a web browser technology Perturbed angular correlation Polyaluminium chloride, less effective than aluminium chlorohydrate...

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Nuclear magnetic moment

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resonance (NMR) ~ ms Time differential perturbed angular distribution (TDPAD) ~ μs Perturbed angular correlation (PAC) ~ ns Time differential recoil into...

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Electric field gradient

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nuclear quadrupole resonance (NQR), Mössbauer spectroscopy or perturbed angular correlation (PAC). The EFG is non-zero only if the charges surrounding the...

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Nuclear magnetic resonance spectroscopy

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nuclear spectroscopy: Mössbauer effect Muon spin spectroscopy Perturbed angular correlation Charles P. Slichter (1963). Principles of magnetic resonance:...

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Nuclear spectroscopy

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studies: Nuclear magnetic resonance (NMR) Mössbauer spectroscopy Perturbed angular correlation (PAC, TDPAC, PAC spectroscopy) Muon spin spectroscopy Nuclear...

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Spectroscopy

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electric field gradient (EFG) in the absence of magnetic field Perturbed angular correlation (PAC) uses radioactive nuclei as probe to study electric and...

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Hyperfine structure

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are nuclear magnetic resonance, Mössbauer spectroscopy, and perturbed angular correlation. The atomic vapor laser isotope separation (AVLIS) process uses...

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Instrumental chemistry

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resonance spectroscopy (NMR), Mössbauer spectroscopy (MBS), and perturbed angular correlation (PAC). Mass spectrometry measures mass-to-charge ratio of molecules...

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Phase transition

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non-magnetic transitions. Limited up to about 800–1000 °C) Perturbed angular correlation (simultaneous measurement of magnetic and non-magnetic transitions...

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Gamma spectroscopy

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scintillation counting Mass spectrometry Mössbauer spectroscopy Perturbed angular correlation Pandemonium effect Total absorption spectroscopy Scintillation...

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Condensed matter physics

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SR), Mössbauer spectroscopy, β {\displaystyle \beta } NMR and perturbed angular correlation (PAC). PAC is especially ideal for the study of phase changes...

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Nuclear chemistry

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Important methods are NMR (see below), Mössbauer spectroscopy and Perturbed angular correlation. These methods use the interaction of the hyperfine field with...

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Local structure

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g. nuclear magnetic resonance, Mössbauer spectroscopy, and perturbed angular correlation. With the same methods, the local magnetic fields in a crystal...

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ISOLDE

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ISOLDE. The laboratory uses the technique of Time Differential Perturbed Angular Correlation (TDPAC) to probe the large quantity of available radioactive...

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Nuclear orientation

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1007/BF03162437 Nuclear magnetic resonance Mössbauer spectroscopy Perturbed angular correlation Nuclear orientation, The Free Dictionary. Nuclear orientation...

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Muon spin spectroscopy

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the society's goals. Muon Muonium Nuclear magnetic resonance Perturbed angular correlation Resonance techniques are often characterized by the use of resonant...

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Walsh diagram

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Walsh diagrams, often called angular coordinate diagrams or correlation diagrams, are representations of calculated orbital binding energies of a molecule...

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Carol Alonso

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example, she was the only female. She completed her Ph.D. thesis Perturbed Angular Correlations in 1970 supervised by Lee Grodzins. While at MIT she chaired...

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Pulsar timing array

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quadrupolar correlation[clarify] between arrival times of pulses emitted by different millisecond pulsar pairings that depends only on the pairings' angular separations...

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Quantum field theory

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(perturbative) interacting theory.: 90  This makes the Feynman propagator one of the most important quantities in quantum field theory. Correlation functions...

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Feynman diagram

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diagram is a graphical representation of a perturbative contribution to the transition amplitude or correlation function of a quantum mechanical or statistical...

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Rydberg atom

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of the ion core produces an anisotropic potential that causes an angular correlation between the motions of the two outermost electrons. This can be thought...

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