Positron annihilation in C60

Y. C. Jean, X. Lu, Y. Lou, A. Bharathi, C. S. Sundar, Y. Lyu, P. H. Hor, C. W. Chu

研究成果: Article同行評審

42 引文 斯高帕斯(Scopus)

摘要

Positron lifetime experiments have been performed in C60 as a function of (1) pressure up to 14.7 kbar, (2) temperature between 10 and 300 K, and (3) oxygen pressure up to 2 atm. Nearly single lifetimes (356 ps, 98%) have been observed in C60 solids. A large lifetime-pressure variation [(9-3 0.5)×10-3 kbar-1] and a monotonic lifetime-temperature variation [(1.5 0.2)×10-4 K-1] are observed while the presence of oxygen does not change the positron lifetime. These results are interpreted in terms that the positron is mainly annihilating with electrons near the interstitial octahedral sites of fcc lattices. Results of the calculated positron density distribution support this interpretation.

原文English
頁(從 - 到)12126-12129
頁數4
期刊Physical Review B
45
發行號20
DOIs
出版狀態Published - 1992

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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