Time differential perturbed angular correlation

SRPAC is a scattering variant of time-differential perturbed angular correlation (TDPAC). In TDPAC, an intermediate nuclear level is populated from above after the decay of a radioactive parent. If this nuclear level exhibits hyperfine... 

The first observation of Zn NMR in zinc metal was by Abart and coworkers in a measurement at 4.2 K, using a field sweeping technique, which yielded a value of = 12 73(4) MHz. No subsequent NMR observation has been reported. A measure of the temperature dependence of the Zn nuclear quadrupole coupling in zinc metal has been obtained from time differential perturbed angular correlation (TDPAC) measurements using an excited state of Zn (/ = 9/2 605 keV). However, the use of liquid helium temperatures and exotic short-lived isotopes precludes the adoption of these techniques for general material characterization. 

See lext. XD = X-ray diffraction 1R = infrared spectrum R = Raman spectrum UV = ultraviolet spectrum H-NMR = ]HNMR spectrum C-NMR = 13CNMR spectrum F-NMR =, 9FNMR spectrum MS = mass spectrum PES — photoelectron spectrum E - electric polarization and dielectric loss measurements D = dipole moment measurements TDPAC = time differential perturbed angular correlation measurements GC = gas chromatography TA = thermal analysis M = molecular weight A = electrical conductance. c Isolated as the THF adduct M(dik)Cl3-C4HgO. 

An inexpensive target system for the production of the NCA radioisotope, 77Br323,324, has been described recently325 and applied for time differential perturbed angular correlation (TDPAC) studies which provide information of physical interest. TDPAC has also found application in the field of chemistry326 and biology31. 

An intrafullerene dynamics of Ce atom in the Cs2 cage was also studied by time-differential perturbed angular correlation measurements (Sato et al., 1998). The observed angular correlation shows the presence of two different chemical species of Ce Cs2- The data at low temperatures reveal that Ce stays at a certain site for one of the species, whereas for the other the atom has an intramolecular dynamic motion. 

Time Differential Perturbed Angular Correlation (TDPAC)... 

Hyperfine interactions, that is the interaction of a nuclear magnetic moment with extranuclear magnetic fields and the interaction of a nuclear quadrupole moment with electric field gradients from extranuclear charge distributions, are measured via time differential perturbed angular correlation (TDPAC) of y-rays emitted from radioisotopes. 

Time differential perturbed angular correlation (TDPAC) spectroscopy provides information about chemical environment of nuclei whose decay results in a 7-7 cascade. This method allows to study sorbed ions at very low concentrations, but the number of suitable nuclei, i.e. isomeric nuclei having life times sufficient to prepare the sample ( " Cd, Pb) is limited. Decay of / -active nuclides often... 

TDPAC time differential perturbed angular correlation (spectroscopy)... 

Time differential perturbed angular correlation spectroscopy, 353 Time, dimensionless, 535 Time resolved laser induced fluorescence spectroscopy, 349, 350 Titanates... 

Biochemical studies indicate that radiohafnium ( Hf+ Hf) is bound mainly to the transferrin, in blood plasma and in the liver cytosol of both the rat and the hamster, as has been observed also for plutonium (Taylor etal. 1983). Two specific electric quadrupole interactions have been observed in the binding of hafnium to transferrin in sera of humans and rats, using the time differential perturbed angular correlation (TDPAC-) technique (Then et al. 1986, Appel et al. 1987). They may be attributed to the N-terminal and the C-terminal binding sites in the transferrin molecule. 

T. Butz, Nuclear quadrupole interactions studies by time differential perturbed angular correlations of gamma-rays, Z. Naturforsch. A 1996, 5/(5-6), 396-410. 

Marchi, A.J., Lede, E.J., Requejo, F.G., Renteria, M., Irusta, S., Lombardo, E.A., and Miro, E.E. Laser Raman spectroscopy (LRS) and time differential perturbed angular correlation (TDPAC) study of surface species on Mo/Si02 and Mo,Na/Si02. Their role in the partial oxidation of methane. Catal. Lett. 1997, 48, 47-54. 

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