Fig. 3: Annihilation rates.
From: Precision spectroscopy of the hyperfine components of the 1S–2S transition in antihydrogen
Temporal evolution of the annihilation rates during each of the laser exposures, normalized to the fitted rate during the first bin, with the fits drawn as solid or dot–dashed lines. The bin width corresponds to a full double sweep over the spectral line for runs 1 and 2. For run 3, the same bin width is achieved with two double sweeps, since the exposures are half as long. It can be seen that the depletion rate for the laser-cooled d–d transition in runs 2 and 3 (filled square symbols) is much higher than the uncooled transitions. The inset shows the d–d component spectra of runs 1 and 3 (ref. 14), which are included for self-consistency. The fits and data are normalized so that the fits have a peak value of 1. The plotted uncertainties represent one-standard-deviation counting errors.
