Ortho-Positronium Lifetime As a Detector of Spin-Crossover

• Authors: M. Bokor , T. Marek , K. Süvegh , Z. Böcskei , J. Buschmann , A. Vértes
• Languages of publication: EN

Abstracts

EN

Positron lifetime parameters were measured for the spin-crossover complexes [Fe(R-1H-tetrazole)_{6}](BF_{4})_{2} (R = 1-ethyl, 1-n-propyl) and for the diamagnetic [Zn(1-n-propyl-1H-tetrazole)_{6}](BF_{4})_{2}. Positronium forms with significant intensity in the studied compounds. The ortho-para conversion of ortho-positronium was used to follow the spin-crossover. Changes of the dynamic structure were found in the propyltetrazole complex between 150 K and 90 K.

Keywords

EN

78.70.Bj; 36.10.Dr; 75.20.-g; 33.25.+k

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 75.20.-g: Diamagnetism, paramagnetism, and superparamagnetism
• 36.10.Dr: Positronium(see also 82.30.Gg Positronium chemistry)
• 33.25.+k: Nuclear resonance and relaxation(see also 76.60.-k Nuclear magnetic resonance and relaxation in condensed matter; 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1999
• Volume: 95
• Issue: 4
• Pages: 469-473

Dates

published

1999-04

Contributors

author

M. Bokor

• Department of Nuclear Chemistry, Eötvös Loránd University, P.O. Box 32, 1518 Budapest, Hungary

author

T. Marek

• Department of Nuclear Chemistry, Eötvös Loránd University, P.O. Box 32, 1518 Budapest, Hungary

author

K. Süvegh

• Department of Nuclear Chemistry, Eötvös Loránd University, P.O. Box 32, 1518 Budapest, Hungary

author

Z. Böcskei

• Chinoin Inc., Budapest, Hungary

author

J. Buschmann

• Institute für Kristallographie, Freie Universität, Berlin, Germany

author

A. Vértes

• Department of Nuclear Chemistry, Eötvös Loránd University, P.O. Box 32, 1518 Budapest, Hungary

Identifiers

DOI

10.12693/APhysPolA.95.469