“…In the case of zero field, the observed light yield is usually interpreted as a relative scintillation efficiency with respect to a known gamma-ray energy, such as 122 keV from 57 Co calibration source [8,10,17]. The available data from various experiments [29,30,31,32,33,34] shows a rather broad distribution, which deserves a good physics model to justify the observed data points. The observed relative scintillation efficiency can be explained by three physics functions: the variation of the W i -value, quenching factors, and recombination.…”