Shin, Hyun Joon 2024-01-12T11:07:55Z 2024-01-12T11:07:55Z 2022-01-14 1999-01-01 https://pubs.kist.re.kr/handle/201004/85332 Soft X-ray spectra of optical-field ionized helium gas by a femtosecond Ti:Saphire laser Conference 1 CLEO/Pacific Rim '99