Nuclear orientation of111m Cd in Zn and Be and the quadrupole moment of the 245keV state

Herzog, P.; Freitag, Κ.; Reuschenbach, M.; Walitzki, H.

doi:10.1007/bf01473117

Cited by 106 publications

(39 citation statements)

References 14 publications

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“…Using the quadrupole moment value of the 247 keV state in 111 Cd (Q = 0.83( 13) b) [2] and of the 482 keV state of 18l Ta(Q = 2.36 b) [3], the experimental values of the EFG at the impurity nuclei were computed from the measured quadrupole interaction frequencies and collected in Thus the host lattice must be subject to different local distortions due to different size mismatch of both impurities. Also a charge screening of the two impurities would be quite dissimilar because Cd +2 or Ta +3 impurity ions have different charges with respect to the lattice.…”

Section: Discussionmentioning

confidence: 99%

PAC Studies of Ag-Hf Intermetallic Compounds

Wodniecki

Wodniecka

Marszałek

et al. 1996

Zeitschrift Für Naturforschung A

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The hyperfine quadrupole interaction of 181Ta and 111Cd probes in HfAg and HfiAg com-pounds was studied at 24 to 1100 K with the time -differential perturbed angular correlation (TDPAC) technique. The EFGs measured in HfAg on 181Ta and 111Cd are 1.388(5)x1018 Vcm-2 and 0.340(5)x1018 Vcm -2 , respectively. For both probe atoms a linear decrease of the EFG with temperature was observed with slopes 1.11(2)x10-4 K-1 and 1.73(5)x10-4 K-1 for 181Ta and 111Cd, respectively. In Hf2 Ag, 0.469(2)x1018 Vcm-2 was determined on 181Ta nuclei and 0.428(5)x1018 Vcm-2 on 111Cd. Also a linear EFG temperature dependence with the large slope of 2.39(6)x10-4 K-1 was observed for 111Cd probes in Hf2Ag, while the EFG measured on 181Ta nuclei in this compound exhibits a very weak temperature variation which can be fitted neither with a linear T nor a T 3/2 dependence. In all cases the electronic contributions to the EFG are very small indicating that these transition element systems do not obey the universal correlation between the electronic and the ionic EFG observed in numerous other systems not belonging to the transition metal series.

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Section: Discussionmentioning

confidence: 99%

PAC Studies of Ag-Hf Intermetallic Compounds

Wodniecki

Wodniecka

Marszałek

et al. 1996

Zeitschrift Für Naturforschung A

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“…For comparison, on the V zz calculation we used the old Q value of 0.83(13) b. 16 However, the current one is 0.683(20) b. 17 second nearest neighbor site of probes.…”

Section: Resultsmentioning

confidence: 99%

Implantation of cobalt in SnO2 thin films studied by TDPAC

et al. 2017

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Here we report time differential perturbed angular correlation (TDPAC) results of Co-doped SnO2 thin films. Making use of stable Co and radioactive 111In implanted at the Bonn Radioisotope Separator with energies of 80 keV and 160 keV, respectively, it was possible to study the dopant incorporation and its lattice location during annealing. The hyperfine parameters have been probed as a function of temperature in vacuum. Two quadrupole interactions were observed. At high temperatures the dominant fraction for the probe nuclei can be assigned to the Cd-incorporation at the cation substitutional site in a highly disordered structure, obtained after implantation, to high crystallinity for the measurements at 873 K and 923 K. The similarity in TDPAC spectra obtained in undoped SnO gives indirect evidence that In and Co diffuse to different depths during the annealing process. Other interpretations will be discussed.

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“…The uncertainuncertainties in the obtained ν Q values of around 1% are mainly determined by the error in the time calibration of the spectrometers. V zz depends on the quadrupole moment Q which is not known with high accuracy (we used a value of Q = 0.83(13) barn) [10]. We further point out that the EFG can vary for layers with different strain states or doping levels.…”

Section: Resultsmentioning

confidence: 99%

Ion implantation of Cd and Ag into AlN and GaN

Miranda

Kessler

Correia

et al. 2012

Phys. Status Solidi C

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GaN and AlN thin films were implanted with cadmium (Cd) or silver (Ag), to fluences ranging from 1×10 13 to 1.7 × 10 15 at/cm 2 . The implanted samples were annealed at 950 ºC under flowing nitrogen. While implantation damage could be fully removed for the lowest fluences, for higher fluences the crystal quality was only partially recovered. For the high fluence samples the lattice site location of the ions was studied by Rutherford Backscattering/channelling (RBS/C). Cd ions are found to be incorporated in substitutional cation sites (Al or Ga) while Ag is slightly displaced from this position. To further investigate the incorporation sites, Perturbed Angular Correlation (PAC) measurements were performed and the electric field gradients at the site of the probe nuclei were determined.

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Nuclear orientation of111m Cd in Zn and Be and the quadrupole moment of the 245keV state

Cited by 106 publications

References 14 publications

PAC Studies of Ag-Hf Intermetallic Compounds

PAC Studies of Ag-Hf Intermetallic Compounds

Implantation of cobalt in SnO2 thin films studied by TDPAC

Ion implantation of Cd and Ag into AlN and GaN

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