Perturbed angular correlation (original) (raw)
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.
| Property | Value |
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| dbo:abstract | Die gestörte γ-γ-Winkelkorrelation, kurz PAC (englisch perturbed angular correlation) oder PAC-Spektroskopie, ist eine Methode der nuklearen Festkörperphysik, mit der magnetische und elektrische Felder in Kristallstrukturen gemessen werden können. Dabei werden elektrische Feldgradienten und die Larmorfrequenz in Magnetfeldern sowie dynamische Effekte bestimmt. Mit dieser sehr sensitiven Methode, die nur ca. 10–1000 Milliarden Atome eines radioaktiven Isotops pro Messung benötigt, können Materialeigenschaften in der lokalen Struktur, Phasenübergänge, Magnetismus und Diffusion untersucht werden. Die PAC-Methode ist verwandt mit der Kernspinresonanz und dem Mößbauer-Effekt, jedoch zeigt sie keine Signalabschwächung bei sehr hohen Temperaturen. Heute wird hauptsächlich die zeit-differenzielle PAC (TDPAC, englisch time differential perturbed angular correlation) verwendet. (de) 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. (en) |
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| rdfs:comment | 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. (en) Die gestörte γ-γ-Winkelkorrelation, kurz PAC (englisch perturbed angular correlation) oder PAC-Spektroskopie, ist eine Methode der nuklearen Festkörperphysik, mit der magnetische und elektrische Felder in Kristallstrukturen gemessen werden können. Dabei werden elektrische Feldgradienten und die Larmorfrequenz in Magnetfeldern sowie dynamische Effekte bestimmt. Mit dieser sehr sensitiven Methode, die nur ca. 10–1000 Milliarden Atome eines radioaktiven Isotops pro Messung benötigt, können Materialeigenschaften in der lokalen Struktur, Phasenübergänge, Magnetismus und Diffusion untersucht werden. Die PAC-Methode ist verwandt mit der Kernspinresonanz und dem Mößbauer-Effekt, jedoch zeigt sie keine Signalabschwächung bei sehr hohen Temperaturen. Heute wird hauptsächlich die zeit-differenzielle (de) |
| rdfs:label | Gestörte Gamma-Gamma-Winkelkorrelation (de) Perturbed angular correlation (en) |
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