Soft-x-ray emission from small-sized Ne clusters heated by intense, femtosecond laser pulses
Soft-x-ray emission from a cryogenically cooled Ne jet irradiated by intense, 25-fs laser pulses was measured. The Ne spectrum started to drastically change in emitting ions from Ne5+ to Ne7+ below the preexpansion temperature of -120 degrees C. The significant change in the spectrum is attributed to the collisional heating of small-sized Ne clusters formed in the cooled jet. The increase of the laser pulse length from 25 fs to 100 fs resulted in further increase of x-ray emission from Ne7+ states.
Mocek
T
Department of Physics, KAIST, 373-1 Kusong-dong, Yusong-gu, Taejon 305-701, Korea.
Kim
CM
Shin
HJ
Lee
DG
Cha
YH
Hong
KH
Nam
CH