SUBPICOSECOND LASER IONIZATION OF FREE C-60 AND C-70 AT 248-NM

被引：25

作者：

ZHANG, Y ^{[1
]}

SPATH, M ^{[1
]}

KRATSCHMER, W ^{[1
]}

STUKE, M ^{[1
]}

机构：

[1] MAX PLANCK INST NUCL PHYS,W-6900 HEIDELBERG 1,GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS | 1992年 / 23卷 / 03期

关键词：

33.80.Rv; 36.40.+d;

D O I：

10.1007/BF01437394

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Delayed ionization is found to be absent for sub-picosecond laser excitation of free C60 and C70 at 248 nm. The autocorrelation trace obtained for C60+ in a laser time-of-flight (TOF) mass spectrometer using two time-delayed and collinear 248 nm ultrashort laser pulses has a width of 1.1 ps (715 fs for sech2 pulses), in agreement with the laser pulse duration measurement in NO gas. Both above observations can be explained by direct ionization of C60 via coherent two-photon absorption by the high intensity sub-picosecond 248 nm laser excitation avoiding the channel leading to delayed ionization.

引用

页码：195 / 196

页数：2

共 8 条

[1] DELAYED IONIZATION OF C60 AND C70 [J].