The absolute secondary scintillation yield is of paramount importance for modelling dual-phase or high-pressure gas detectors, to be used in contemporary and in future rare event detection experiments. In addition, the search for neutrinoless double electron capture complements the search for neutrinoless double beta decay and has been measured for ¹²⁴Xe in several Dark Matter and Double Beta decay detectors, operating at present. Krypton presents itself as an interesting candidate for double electron capture detection experiments. We have studied the krypton secondary scintillation yield, at room temperature, as a function of electric field in the gas scintillation gap. A large area avalanche photodiode has been used to allow the simultaneous detection of the scintillation pulses as well as the direct interaction of x-rays, the latter being used as a reference for the calculation of the number of charge carriers produced by the scintillation pulses and, thus, the determination of the number of photons impinging the photodiode. An amplification parameter of 113 photons per kV per drifting electron and a scintillation threshold of 2.7 Td (0.7 kV cm⁻¹ bar⁻¹ at 293 K) was obtained, in good agreement with the simulation data reported in the literature. On the other hand, the ionisation threshold in krypton was found to be around 13.5 Td (3.4 kV cm⁻¹ bar⁻¹), less than what had been obtained by the most recent simulation work-package. The krypton amplification parameter is about 80% and 140% of those measured for xenon and argon, respectively.

绝对二次闪烁产额对于模拟双相或高压气体探测器至关重要，可用于当代和未来的罕见事件探测实验。此外，对无中微子双电子俘获的探索补充了对无中微子双β衰变的探索，并且已经测量了¹²⁴目前正在运行的几个暗物质和双 Beta 衰变探测器中的氙气。氪是双电子捕获检测实验的一个有趣的候选者。我们研究了室温下氪二次闪烁产率作为气体闪烁间隙中电场的函数。大面积雪崩光电二极管已被用于允许同时检测闪烁脉冲以及 X 射线的直接相互作用，后者被用作计算闪烁脉冲产生的电荷载流子数量的参考和，因此，确定撞击光电二极管的光子数量。每个漂移电子每 kV 113 个光子的放大参数和 2.7 Td (0.7 kV  cm ^-1 bar ^-1 at 293 K)，与文献中报道的模拟数据非常吻合。另一方面，发现氪中的电离阈值约为 13.5 Td（3.4 kV  cm ^-1  bar ^-1），低于最近的模拟工作包获得的值。氪放大参数分别是氙和氩测量参数的 80% 和 140%。