TY - JOUR
T1 - Real-time observation of disintegration processes within argon clusters ionized by a hard-X-ray pulse of moderate fluence
AU - Kumagai, Yoshiaki
AU - Jurek, Zoltan
AU - Xu, Weiqing
AU - Fukuzawa, Hironobu
AU - Motomura, Koji
AU - Iablonskyi, Denys
AU - Nagaya, Kiyonobu
AU - Wada, Shin Ichi
AU - Mondal, Subhendu
AU - Tachibana, Tetsuya
AU - Ito, Yuta
AU - Sakai, Tsukasa
AU - Matsunami, Kenji
AU - Nishiyama, Toshiyuki
AU - Umemoto, Takayuki
AU - Nicolas, Christophe
AU - Miron, Catalin
AU - Togashi, Tadashi
AU - Ogawa, Kanade
AU - Owada, Shigeki
AU - Tono, Kensuke
AU - Yabashi, Makina
AU - Son, Sang Kil
AU - Ziaja, Beata
AU - Santra, Robin
AU - Ueda, Kiyoshi
N1 - Funding Information:
We are grateful to the late Makoto Yao for his invaluable contributions to the present paper. The experiments were performed at SACLA with the approval of Japan Synchrotron Radiation Research Institute and the program review committee (No. 2014A8040). This paper was supported by the X-ray Free Electron Laser Utilization Research Project and the X-ray Free Electron Laser Priority Strategy Program of the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT); by the Proposal Program of SACLA Experimental Instruments of RIKEN; by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grants No. JP21244042, No. JP23241033, No. JP15K17487, and No. 16K05016; by MEXT KAKENHI Grant No. JP22740264; by the IMRAM project; and by the National Natural Science Foundation of China Grant No. 11604003. H.F. and K.U. acknowledge “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials.” K.N. and S.W. acknowledge the Research Program “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials” in “Network Joint Research Center for Materials and Devices.” S.M. acknowledges JSPS KAKENHI Grant No. JP11F01028. T.N. acknowledges the Research Program for Next Generation Young Scientists “Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials” in “Network Joint Research Center for Materials and Devices.” D.I. and Y.I. acknowledge Institute of Multidisciplinary Research for AdvancedMaterials project (IMRAM), Tohoku University.
PY - 2020/2
Y1 - 2020/2
N2 - We present a time-resolved study of disintegration within atomic clusters ionized by a hard-X-ray pulse of moderate fluence. It was performed with electron and ion spectroscopy, and complemented by theoretical simulations. The expanding clusters were probed with a near-infrared (NIR) laser pulse over a range of pump-probe delays from-4 to 10 ps. In addition to an increasing number of singly charged atomic ions, originating from the ionization of Rydberg atoms formed through electron-ion recombination, we observe a decrease of oligomer yields. The latter is due to the interaction of oligomers with the NIR probe pulse, leading to their dissociation. At time delays between-1 and 2 ps, efficient absorption of the NIR laser energy occurs, even though the NIR intensity is too low to trigger tuneling ionization of Ar atoms. Our observations are similar to earlier observations of the fragmentation behavior of clusters excited by soft-X-ray pulses. This indicates that the relaxation dynamics of X-ray-excited nano-objects are universal over a wide range of excitation photon energies.
AB - We present a time-resolved study of disintegration within atomic clusters ionized by a hard-X-ray pulse of moderate fluence. It was performed with electron and ion spectroscopy, and complemented by theoretical simulations. The expanding clusters were probed with a near-infrared (NIR) laser pulse over a range of pump-probe delays from-4 to 10 ps. In addition to an increasing number of singly charged atomic ions, originating from the ionization of Rydberg atoms formed through electron-ion recombination, we observe a decrease of oligomer yields. The latter is due to the interaction of oligomers with the NIR probe pulse, leading to their dissociation. At time delays between-1 and 2 ps, efficient absorption of the NIR laser energy occurs, even though the NIR intensity is too low to trigger tuneling ionization of Ar atoms. Our observations are similar to earlier observations of the fragmentation behavior of clusters excited by soft-X-ray pulses. This indicates that the relaxation dynamics of X-ray-excited nano-objects are universal over a wide range of excitation photon energies.
UR - http://www.scopus.com/inward/record.url?scp=85082762904&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85082762904&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.101.023412
DO - 10.1103/PhysRevA.101.023412
M3 - Article
AN - SCOPUS:85082762904
VL - 101
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 2
M1 - 023412
ER -