Quadrupole Interaction of 172Yb and 168Er Nuclei in the First Excited 2+ State

2000 ◽  
Vol 55 (1-2) ◽  
pp. 45-48
Author(s):  
K. Królas ◽  
M. Rams ◽  
J. Wojtkowska
Keyword(s):  
Angular Correlation ◽  
Quadrupole Interaction ◽  
Intermediate State ◽  
Half Life ◽  
Perturbed Angular Correlation ◽  
Hyperfine Interactions ◽  
Correlation Spectroscopy ◽  
Interaction Frequency ◽  
Perturbed Angular Correlation Spectroscopy ◽  
Precise Information

We have measured the hyperfine interactions in YbVO4 and YbPO4 using 172Yb perturbed angular correlation spectroscopy for 90 -1094 keV and 1094 -79 keV γ-γ cascades. The quadrupole interaction frequency varied with temperature from 0 to 2 GHz. Precise information was obtained from both cascades independently even using the cascade with the intermediate state of the half life as short as 1.6 ns.

scholarly journals Perturbed Angular Correlation Studies in SrTiO3 Single Crystals

2000 ◽  
Vol 55 (1-2) ◽  
pp. 237-241
Author(s):  
P. de la Presa ◽  
K. P. Lieb ◽  
M. Uhrmacher ◽  
L. Ziegeler
Keyword(s):  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
Hyperfine Interactions ◽  
Correlation Spectroscopy ◽  
Quadrupole Frequency ◽  
Perturbed Angular Correlation Spectroscopy ◽  
Temperature Range ◽  
Field Gradients ◽  
Electronic Defects ◽  
Asymmetry Parameters

The quadrupole hyperfine interactions of 111Cd/111 In probe nuclei in single-crystalline SrTiO3 perovskite samples were investigated using Perturbed Angular Correlation spectroscopy. Three electric field gradients were detected and their fractions and hyperfine parameters were measured in the temperature range from 26 to 700 K. The fraction f0 having a vanishing quadrupole frequency, as expected for 111Cd on substitutional sites in a cubic lattice, starts to develop around 300 K and reaches 100% at 700 K. Two well-defined EFG's having closely lying quadrupole frequencies and asymmetry parameters of ωQi = 49.1(3) Mrad/s, 77, η0= 0.10(2) and ωQ2 = 51.8(3) Mrad/s, η2 = 0.12(2), at room temperature, were identified in the temperature range from 250 to 530 K, and their (100) orientation in the lattice was determined. They are associated with electronic defects at the probe atoms.

Defects in CdS: In detected by perturbed angular correlation spectroscopy (PAC)

1991 ◽  
Vol 50 (1-4) ◽  
pp. 159-164 ◽  
Author(s):  
R. Magerle ◽  
M. Deicher ◽  
U. Desnica ◽  
R. Keller ◽  
W. Pfeiffer ◽  
...  
Keyword(s):  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
Correlation Spectroscopy ◽  
Perturbed Angular Correlation Spectroscopy

Hafnium, cadmium and indium impurities in 4H-SiC observed by perturbed angular correlation spectroscopy

1997 ◽  
Vol 6 (10) ◽  
pp. 1436-1439 ◽  
Author(s):  
T. Licht ◽  
N. Achtziger ◽  
D. Forkel-Wirth ◽  
K. Freitag ◽  
J. Grillenberger ◽  
...  
Keyword(s):  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
Correlation Spectroscopy ◽  
Perturbed Angular Correlation Spectroscopy
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