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We present a systematic study of the time and band-resolved scintillation inxenon-based time projection chambers (TPCs), performed simultaneously for theprimary (S1) and secondary (S2) components in a small, purity-controlled,setup. We explore a range of conditions of general academic interest, focusingon those of relevance to contemporary TPCs: pressure range ([1- 10] bar),pressure-reduced electric fields ([0-100] V/cm/bar in the drift region (S1) andup to the proportional scintillation regime in the multiplication region (S2)),wavelength-band ([145-250], [250-400], [400-600] nm), and primary excitation($\alpha$, $\beta$-particles). Attention is paid to the possibility ofnon-conventional scintillation mechanisms such as the 3rd continuum emission,recombination light from $\beta$-electrons at high pressure (for S1), emissionfrom high-lying excited states and neutral bremsstrahlung (for S2). Timeconstants and, specially, scintillation yields have been obtained as a functionof electric field and pressure, the latter aided by Geant4 simulations.

Time and band-resolved scintillation in time projection chambers based on gaseous xenon