Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects
Laboratory spectroscopy of silicon plasmas photoionized by mimic astrophysical compact objects
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模拟天体物理致密天体光离子化硅等离子体的实验室光谱
DOI:
10.1088/0741-3335/51/12/124032
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发表时间:
2009-11
影响因子:
2.2
通讯作者:
Tanabe, M.
中科院分区:
文献类型:
--
作者:
Takabe, H.;Fujioka, S.;Yamamoto, N.;Rhee, Y-J;Li, Y.;Wang, S.;Nakabayashi, Y.;Zhang, Y.;Lee, Y-W;Han, J-M;Zhong, J.;Zhang, J.;Wang, F.;Nishimura, H.;Salzmann, D.;Kwon, D-H;Fujiwara, T.;Dong, Q.;Zhao, G.;Tanabe, M.
Photoionized plasmas are encountered in astrophysics wherever low-temperature gas/plasma is bathed in a strong radiation field. X-ray line emissions in the several kiloelectronvolts spectral range were observed from accreting clouds of binary systems, such as CYGNUS X-3 and VELA X-1, in which high-intensity x-ray continua from compact objects (neutron stars, black holes or white dwarfs) irradiate the cold and rarefied clouds. X-ray continuum-induced line emission accurately describes the accreting clouds, but experimental verification of this photoionized plasma model is scarce. Here we report the generation of photoionized plasmas in the laboratory under well-characterized conditions using a high-power laser. A blackbody radiator at a temperature of 500 eV, corresponding to a compact object, was created by means of a laser-driven implosion. The emerging x-rays irradiate a low-density (ne < 1020 cm−3) and low-temperature (Te < 30 eV) silicon plasma. Line emissions from lithium- and helium-like silicon ions were observed from a thermally cold silicon plasma in the 1.8–1.9 keV spectral region, far from equilibrium conditions. This result reveals the laboratory generation of a photoionizing plasma. Atomic kinetic calculations imply the importance of direct K-shell photoionization by incoming hard x-rays.
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DOI:
10.1088/0953-4075/31/9/024
发表时间:
1998-05
期刊:
Journal of Physics B
影响因子:
--
作者:
S. Rose
通讯作者:
S. Rose
DOI:
10.1086/310217
发表时间:
1996-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
D. Liedahl;F. Paerels
通讯作者:
D. Liedahl;F. Paerels
影响因子:
19.6
作者:
Fujioka, Shinsuke;Takabe, Hideaki;Mima, Kunioki
通讯作者:
Mima, Kunioki
DOI:
10.1063/1.2946923
发表时间:
2008-04
期刊:
Bulletin of the American Physical Society
影响因子:
--
作者:
Feilu Wang;S. Fujioka;H. Nishimura;D. Kato;Yu-Tong Li;Gang Zhao;Jie Zhang;H. Takabe
通讯作者:
Feilu Wang;S. Fujioka;H. Nishimura;D. Kato;Yu-Tong Li;Gang Zhao;Jie Zhang;H. Takabe
DOI:
10.5860/choice.26-6270
发表时间:
1989
期刊:
--
影响因子:
--
作者:
D. Osterbrock;G. Ferland
通讯作者:
D. Osterbrock;G. Ferland