A wide variety of spectroscopic methods are used for the diagnostics of laser-produced plasma. One particularly powerful diagnostic is high-resolution emission line spectroscopy, in conjunction with atomic calculations and radiation hydrodynamic simulations. In this work, we present line-resolved spectra of L-shell molybdenum $(Z=42)$ plasma produced by high-energy laser pulses of ∼200–400 J at a wavelength of 351 nm, with durations of 1–3 ns. The experiments were conducted at the National Laser Facility, Soreq, Israel. Time-integrated spectra were recorded in the range of 2 to 4.1 keV with a high-resolution crystal spectrometer $(E/\mathrm{\Delta }E>400)$. Lines of Al-like ${\mathrm{Mo}}^{+29}$ to F-like ${\mathrm{Mo}}^{+33}$ were identified, although the spectrum is dominated by the intense Ne-like ${\mathrm{Mo}}^{+32}$ lines. Collisional-radiative calculations using the HULLAC and nomad codes are in good agreement with the experimental results, providing estimates of an electron density of $n_{\mathrm{e}}=0.6-3\times {10}^{21}\mathrm{c}{\mathrm{m}}^{-3}$ and an electron temperature of $k{T}_{\mathrm{e}}=1.1-1.3\mathrm{keV}$ originating from the coronal region of the plasma.

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• Laboratory studies of space & astrophysical plasmas
• Laser-plasma interactions
• X-ray generation in plasmas
• Bragg spectroscopy
• Energy-dispersive x-ray spectroscopy
• Master equation
• X-ray emission spectroscopy