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Digitale Medien

PAC investigation of77Br→77Se on silicon surfaces (1996)

Lohmüller, J. ; Bertschat, H. H. ; Granzer, H. ; [weitere]

Springer

Hyperfine interactions 97-98 (1996), S. 203-210

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ISSN: 1572-9540

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The perturbedγγ-angular correlation (PAC) method has been applied to investigate the sites occupied by isolated77Br-atoms on silicon surfaces. The nuclear quadrupole interaction was used to determine the electric field gradients (efg) acting at the 5/2− state in77Se, populated in the77Br decay. For the Si(100)2×1 surface two different field gradients have been observed with the parametersν Q1 = 583(5) MHz,η 1 = 0.0(1) andν Q2=543(5) MHz,η 2 = 0.40(3). Typical values for the Si(111)7×7 surface from preliminary data areν Q=548(9) MHz,η=0.54(6). These electric field gradients are identified with adsorption sites of the selenium at dangling bonds of the silicon surfaces.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02150176

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