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Fig. 3 | EPJ Techniques and Instrumentation

Fig. 3

From: Fast decay of 23S1 positronium atoms in an MgO lined cavity

Fig. 3

a Example of lifetime spectra taken with LYSO detector for 3.5 keV positrons impinging on SiO2 (Sig. and Back.) and, b Background subtracted spectra showing examples of photoionization, and \(2\,^{3}\mathrm {S}_{1}\) production, as described in the text. The signal and background spectra in (a) correspond to the photoionization signal in (b)

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