Fig. 20.

Light yield $L_y$ and charge yield $Q_y$ (in PE/keV) for several monoenergetic ER lines between 2.8 keV ($_{}^{37}$Ar [85]) and 4.4 MeV ($_{}^{12}$C). The values from low-energy lines $_{}^{37}$Ar, $_{}^{83m}$Kr, $_{}^{131m}$Xe and $_{}^{129m}$Xe (the latter two activated during neutron calibration) are fitted with the function $Q_y=-\frac{g_2}{g_1}{L}_y+\frac{g_2}{W}$ derived from Eq. (2). The best-fit result is shown in red. Higher-energy lines were excluded from the fit since they are more affected by potential reconstruction biases