20 Result(s)

Article

Structural properties of the donor indium in nanocrystalline ZnO

The structural properties of the nanocrystalline semiconductor ZnO (nano-ZnO) doped with the donor Indium were investigated by perturbed γγ angular correlation spectroscopy (PAC) and extended X-ray absorption ...

T. Agne, M. Deicher, V. Koteski, H.-E. Mahnke, H. Wolf… in Hyperfine Interactions (2004)

Article

Experimental Verification of Calculated Lattice Relaxations Around Impurities in CdTE

We have measured the lattice distortion around As (acceptor) and Br (donor) in CdTe with fluorescence detected X-ray absorption spectroscopy. We could experimentally verify the lattice relaxation with a bond l...

H.-E. Mahnke, H. Haas, V. Koteski, N. Novakovic, P. Fochuk… in Hyperfine Interactions (2004)

Article

EXAFS Studies of the Local Structure Around Zn in Cd_1−x Zn _x Te

X-ray absorption spectroscopy has been used to obtain information on the local structure around Zn atoms in CdTe. The Zn–Te distance is 5% smaller than the Cd–Te bond-length in the bulk, but slightly larger th...

V. Koteski, B. Reinhold, H. Haas, E. Holub-Krappe, H.-E. Mahnke… in Hyperfine Interactions (2001)

Article

Nuclear probes in the materials science of solar cells

We present background material about solar cells and the copper-indium-sulphur system and then discuss three important processes for the production of CuInS₂ solar-cell material. These include: sulphurization of ...

H. Metzner, C. Dzionk, S. Hessler, H. -E. Mahnke, I. Luck… in Hyperfine Interactions (1996)

Article

PAD investigation of¹⁹F in fullerites

Perturbed angular distribution experiments on¹⁹F implanted into fullerites revealed a large fraction of fluorine atoms which are not subject to static quadrupole interactions in contrast to other allotropic forms...

D. Schumann, H. -E. Mahnke, B. Spellmeyer, G. Sulzer, H. Waldmann… in Hyperfine Interactions (1993)

Article

The Knight shift of francium in mercury

For Fr in Hg an extremely small Knight shift has been found as compared to the shift known for an alkali metal host. It indicates an almost complete loss of the outer s-electron of the alkali atom Fr when embe...

H. Haas, Ch. Stenzel, H. -E. Mahnke, B. Spellmeyer, W. -D. Zeitz in Hyperfine Interactions (1990)

Article

New developments in PAC and PAD

Recent developments in both methods, Perturbed Angular Correlation (PAC) and Perturbed Angular Distribution (PAD) concern improvements in the instrumentation for various applications and sophistications in det...

H. -E. Mahnke in Hyperfine Interactions (1990)

Article

Introduction to PAC/PAD

Both methods, Perturbed Angular Correlation (PAC) utilizing radioactive probes and Perturbed Angular Distribution (PAD) following nuclear reactions measure hyperfine interaction parameters and allow to study m...

H. -E. Mahnke in Hyperfine Interactions (1989)

Article

In-beam measurements of nuclear moments

Nuclear moments contribute valuable information to nuclear structure studies of nuclei under extreme conditions, such as nuclei at high angular momentum or far from stability. While the magnetic moment is sens...

H. -E. Mahnke in Hyperfine Interactions (1987)

Article

The Knight shift of francium in cesium

Using the PAD technique the Knight shift for Fr in Cs at 273 K has been measured with the 15⁻ isomer in²¹²Fr. The result 4.9(3)% may be well understood in terms of the conventional analysis. A dominant correction...

H. Haas, H. -E. Mahnke, W. G. Shen, Ch. Stenzel in Hyperfine Interactions (1987)

Article

Knight shift of sp-elements in bismuth

A large negative term in the Knight shift has been found for a number of open p-shell elements of the 5th and 6th period in the host Bi which disappears at the p-shell closure.

A. Berger, H. H. Bertschat, H. -E. Mahnke, B. Spellmeyer, W. Shen in Hyperfine Interactions (1987)

Article

Temperature dependence of the electric field gradient of Hg in Bi

The temperature dependence of the nuclear quadrupole interaction of the¹⁸⁸Hg(12⁺) isomer in a Bi host has been measured by the TDPAD technique. Assuming that the T^3/2 law is valid for this system a fit at the hig...

E. Naim, C. Broude, E. Dafni, M. Hass, M. H. Rafailovich… in Hyperfine Interactions (1987)

Article

Antimony in cadmium — An extreme case of probe atom dependent EFG

The electric field gradient of Sb in Cd was determined by a PAD measurement on¹¹²Sb recoil-implanted into a Cd single crystal. We observe an extremely small value compared with known values on the probes Cd, In, ...

W. Semmler, H. Haas, H. -E. Mahnke, R. Sielemann in Hyperfine Interactions (1983)

Article

Magnetic moment of the 12⁺-isomer in¹⁹²Pb

The magnetic moment of the 12⁺-isomer in¹⁹²Pb has been measured using the PAD technique. The isomer was populated by¹⁵⁶Gd (⁴⁰Ar,4n)-reaction with a pulsed⁴⁰Ar-beam of 185 MeV. The result for the g-factor is g=−0....

Ch. Stenzel, H. Grawe, H. Haas, H. -E. Mahnke, K. H. Maier in Hyperfine Interactions (1983)

Article

Probe atom dependence of the electric field gradient in bismuth

The electric field gradient of T1 in Bi has been determined with the PAD method. The observed value follows the general trend of sp-probe atoms in the group V semimetals in accordance with a covalent bond pict...

H. -E. Mahnke, W. Semmler in Hyperfine Interactions (1983)

Article

The paramagnetism of dilute fe impurities in PT

M. H. Rafailovich, E. Dafni, H. E. Mahnke, G. D. Sprouse… in Hyperfine Interactions (1981)

Article

Local paramagnetism of BCC-and FCC-iron

H. -E. Mahnke, E. Dafni, J. Martorella, M. H. Rafailovich… in Hyperfine Interactions (1981)

Article

The electric field gradient of Sb in Bi

H. -E. Mahnke, H. Haas, W. Semmler, R. Sielemann, W. -D. Zeitz in Hyperfine Interactions (1981)

Article

The electric field gradient for Gd in gadolinium metal

We have examined the temperture dependence of the efg for GdGd above the Curie point. Using anI ^π =10⁺ isomer in¹⁴⁴Gd as a probe nucleus, we find a weakT ^3/2 dependence withB=(1...

O. Häusser, D. Ward, T. K. Alexander, H. R. Andrews… in Hyperfine Interactions (1980)

Article

Temperature dependence of the quadrupole interaction of the impurity⁶⁷Ge In Zn, Cd and Sn

W. Bartsch, B. Lamp, W. Leitz, H. -E. Mahnke, W. Semmler… in Hyperfine Interactions (1976)