Temperature dependence of the positron annihilation in liquid and solid bismuth and gallium

作者: Cz. Szymański , St. Chabik , J. Pajalk , B. Rozenfeld

DOI: 10.1002/PSSA.2210600206

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摘要: The annihilation rate is measured for liquid and solid Bi Ga at the peak of angular correlation curve. Linear increase this observed up to melting point confirms lack positron trapping in Ga. At a nearly 20% counting Ga, while about 5% decrease noticed. anomalies found F(T) curve phase are associated with existence cluster atoms process their structure rebuilding. With exception small momenta ranges there no noticeable variations electron momentum distribution different temperatures. Es wird die Annihilationsrate fur flussiges und festes am Maximum der Winkelkorrelationskurve gemessen. Der lineare Anstieg dieser Rate, bis zum Schmelzpunkt beobachtet wird, bestatigt das Fehlen von Positronenanhaften festem Am ein nahezu Zahlrate beobachtet, wahrend Absinken etwa bemerkt wird. Die F(T)-Kurve gefundenen Anomalien flussige Phase sind mit Existenz Clusteratomen dem Widerherstellungsprozes ihrer Struktur verbunden. Mit Ausnahme des Bereichs kleiner Impulse treten betrachtliche Anderungen bei verschiedenen Temperaturen gemessenen Impulsverteilungen auf.

参考文章(9)
S. H. McFarlane, C. Elbaum, Formation of Dislocation Networks in Gallium Single Crystals Journal of Applied Physics. ,vol. 38, pp. 2024- 2029 ,(1967) , 10.1063/1.1709822
K. Kuribayashi, S. Tanigawa, S. Nanao, M. Doyama, Evaluation of the formation entropy of a single vacancy by means of positron annihilation Solid State Communications. ,vol. 12, pp. 1179- 1182 ,(1973) , 10.1016/0038-1098(73)90137-3
D. Segers, M. Dorikens, L. Dorikens-Vanpraet, Temperature dependence of positron annihilation parameters in bismuth Physica Status Solidi (a). ,vol. 48, pp. 133- 136 ,(1978) , 10.1002/PSSA.2210480117
W. Brandt, H.F. Waung, Positron lifetimes in solid and liquid metals Physics Letters A. ,vol. 27, pp. 700- 701 ,(1968) , 10.1016/0375-9601(68)91014-1
R.N. West, Positron studies of condensed matter Advances in Physics. ,vol. 22, pp. 263- 383 ,(1973) , 10.1080/00018737300101299
W.D Knight, A.G Berger, V Heine, Nuclear resonance in solid and liquid metals: A comparison of electronic structures Annals of Physics. ,vol. 8, pp. 173- 193 ,(1959) , 10.1016/0003-4916(59)90017-X
S Nanao, K Kuribayashi, S Tanigawa, M Doyama, Studies of defects at thermal equilibrium and melting in Cu and Ni by positron annihilation Journal of Physics F: Metal Physics. ,vol. 7, pp. 1403- 1419 ,(1977) , 10.1088/0305-4608/7/8/009
D. Segers, C. Dauwe, M. Dorikens, L. Dorikens-Vanpraet, Temperature dependence of positron annihilation parameters in solid gallium Applied Physics. ,vol. 10, pp. 121- 123 ,(1976) , 10.1007/BF00896331
P. C. Lichtenberger, C. W. Schulte, I. K. MacKenzie, A new equilibrium effect in positron trapping in metals Applied physics. ,vol. 6, pp. 305- 307 ,(1975) , 10.1007/BF00883646