Figure 1: Mass spectrum.
From: Atomically resolved phase transition of fullerene cations solvated in helium droplets
Comparison of a mass spectrum where HenC60+ is transparent (962.21 nm) with mass spectra for three different laser wavelengths at the electronic transition of bare C60+ near 964 nm. Different parts of the mass spectrum are depleted depending on the laser wavelength. The pronounced intensity drops at n=32 and n=60 can be assigned to shell closures of the He adsorbate layer.
