富勒烯晶体的正电子湮没寿命

Positron lifetime in C_(60) and C_(70) fullerite

系统研究了室温下石墨及富勒烯晶体的正电子湮没寿命，发现Ｃ６０及Ｃ６０／Ｃ７０的寿命值分别为３７９ｐｓ和３８８ｐｓ，并给出纯Ｃ７０的双寿命拟合值为２５８ｐｓ和４１０ｐｓ．

Positron lifetime measturements at room temperature have been performed for fullerite of C60/C70,C60(99.9%)and C70(97%).It has been found that the spectra for C60/C70 and C60 hairs one component lifetime of 388 ps and 379 ps respectively,and the C70 spectrum has two components with lifetimes of 258 ps and 410 ps,respectively.