@inproceedings{oai:jaxa.repo.nii.ac.jp:00038436, author = {Wang, Feilu and 藤岡, 慎介 and 西村, 博明 and 加藤, 太治 and Li, Yutong and Zhao, Gang and Zhang, Jie and 高部, 英明 and Wang, Feilu and Fujioka, Shinsuke and Nishimura, Hiroaki and Kato, Daiji and Li, Yutong and Zhao, Gang and Zhang, Jie and Takabe, Hideaki}, book = {宇宙圏研究会高エネルギー宇宙物理連絡会,第8回研究会集録原稿:超新星とその残骸, Proceedings of the 8th Workshop of High Energy AstroPhysics Association, Workshop for Space Astrophysics: Supernova and Its Remnant}, month = {Oct}, note = {The first experiment relevant to astrophysics has been done with intense laser to study the photoionized plasma with large-scale laser system Gekko-12. Independent measurement of the radiation flux indicates values of the ionization parameter xi is approximately 10 erg cm/s and Planckian radiation source of 80 eV to photoionize the nitrogen gas. The observed emission spectra of nitrogen of relatively low density (n(sub i) = 1.4 x 10(exp 19)/cu cm) shows a good agreement with the synthetic spectra by a time-dependent DCA (Detailed Configuration Accounting) atomic model. In this model, it solves the rate equations for level population distributions by considering collisional and radiative atomic processes based on screened hydrogenic model. The jj configuration atomic states and transition probabilities are calculated with HULLAC (Hebrew University Lawrence Livermore Atomic Code) to synthesize spectrum. With this model, we can obtain a reasonable range of the electron temperatures of 20-30 eV. We also show the similarity in spectrum between based on LTE (Local Thermodynamic Equilibrium) and non-LTE. In such case, the physics drastically changes even for the same spectra., 資料番号: AA0063722007}, pages = {173--173}, publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)}, title = {Experimental evidence and theoretical analysis of photoionized plasma under X-ray radiation produced by intense laser}, year = {2007} }