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Neutron diffraction analysis of liquid zinc. — II

Аналиэ диффракции нейтронов в жидком цинке. - II

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Il Nuovo Cimento B (1965-1970)

Summary

Recent experimental data obtained by neutron spectrometry of zinc in several laboratories have been analysed with the purpose of producing the ion-ion potential in this liquid metal. The Percus-Yevick theory that is known to produce reliable inter-atomic potential in simple liquid insulators such as argon, as well as the hyperchain theory were used. Both theories are found to be inadequate in the case of liquid metals, at least if the experimental data presently available are used. Furthermore it seems that in order to proceed efficiently along this line, the region of low wave-vector transfer should be explored with much greater accuracy than now available both in X-ray and neutron-diffraction experiments.

Riassunto

I dati sperimentali ottenuti recentemente in alcuni laboratori mediante diffrazione di neutroni lenti da zinco liquido sono stati analizzati allo scopo di determinare il potenziale ione-ione in tale metallo liquido. Sono state utilizzate sia la teoria « hyperchain ». sia la teoria di Percus-Yevick che dà buoni risultati per liquidi isolanti come l’argon. Entrambe le teorie si sono dimostrate inadeguate al caso di liquidi metallici, almeno quando vengono utilizzati i dati sperimentali attualmente disponibili. Al momento sembra che per ottenere risultati più attendibili sul potenziale ione-ione nei metalli liquidi occorra esplorare la regione di piccoli vettori d’onda trasferiti con accuratezza ben superiore a quella correntemente perseguibile in esperienze di diffrazione di raggi X e di neutroni.

Реэюме

Были проаналиэированы недавние зкспериментальные данные, полученные посредством нейтронной спектроскопии жидкого цинка в нескольких лабораториях, с целью получения ион-ионного потенциала в зтом жидком металле. Испольэовались теория Перкуса-Йевика, которая, как покаэывается, дает надежный междуатомный потенциал в простом жидком иэоляторе, таком как аргон, а также и теория « гиперцепочки ». Найдено, что обе теории являются неадекватными в случае жидких металлов, по крайней мере, если испольэуются зкспериментальные данные, имеюшиеся в настояшее время. Кроме того, кажется, что для того, чтобы зффективно продолжать в зтом направлении, область с малой передачей волнового вектора должна быть исследована с больщей аккуратностью, чем в имеюшихся зкспериментах по диффракции нейтронов и рентгеновских лучей.

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Previous results on this subject were reported at the Europhysics Conference on Time-Dependence of Correlations in Liquids, Chester, April 22nd–24th, 1968.

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Caglioti, G., Corchia, M. & Rizzi, G. Neutron diffraction analysis of liquid zinc. — II. Nuovo Cimento B (1965-1970) 60, 48–60 (1969). https://doi.org/10.1007/BF02712350

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