Fig. 3: MeV-bremsstrahlung.

MeV-bremsstrahlung fluence in dependence on energies from different laser-target setups described in the legend, where used combined aerogel (CHO) with two different thick gold (Au) targets (data as blue and yellow dots) as well as thin and thick metal targets, only (data as magenta and purple triangles). The error bars represent the accuracy of reaction yield and the width of nuclear resonance used for spectral reconstruction (see Methods). Dashed lines are thermal exponential fits on the experimental data.