| Issue |
EPL
Volume 117, Number 6, March 2017
|
|
|---|---|---|
| Article Number | 65001 | |
| Number of page(s) | 6 | |
| Section | Physics of Gases, Plasmas and Electric Discharges | |
| DOI | https://doi.org/10.1209/0295-5075/117/65001 | |
| Published online | 19 May 2017 | |
K-shell photoabsorption edge of strongly coupled aluminum driven by laser-converted radiation
Research Center of Laser Fusion, China Academy of Engineering Physics P.O. Box 919-986, Mianyang 621900, China
(a) yjm70018@sina.com (corresponding author)
Received: 28 February 2017
Accepted: 4 May 2017
The first observation of the K-shell photoabsorption edge of strongly coupled aluminum generated by intense x-ray radiation-driven shocks is reported. By using a “dog bone” gold hohlraum as an x-ray converter, colliding shocks compression and preheating shielding are achieved to generate an unexplored state with a density of 5.5 g/cm3 and temperature of 0.43 eV (the ion-ion coupling parameter 
is around 240). The time-resolved K-shell photoabsorption edges are measured with a crystal spectrometer using a short x-ray backlighter. The broadenings and redshifts of the edges are studied by using the slope fitting of the edge and quantum molecular dynamics calculations. This work shows that the K-edge of aluminum driven by laser-converted radiation provides a novel capability to probe WDM at extended conditions.
PACS: 52.50.Lp – Plasma production and heating by shock waves and compression / 32.30.Rj – X-ray spectra / 78.70.Dm – X-ray absorption spectra
© EPLA, 2017
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