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Ortho-Positronium Lifetime As a Detector of Spin-Crossover

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Bokor M., Marek T., Süvegh K., Böcskei Z., Buschmann J., Vértes A.

Acta Physica Polonica A

1999

vol. 95

issue 4

469-473

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.

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1 Acta Physica Polonica A

1 1999

1 Bokor M.

1 Buschmann J.

1 Böcskei Z.

1 Marek T.

1 Süvegh K.

1 Vértes A.

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Ortho-Positronium Lifetime As a Detector of Spin-Crossover