Scintillation yield of liquid xenon at room temperature

The intensity of scintillation light emission from liquid xenon at room temperature was measured. The scintillation light yield at 1 � C was measured to be 0:64 � 0:02 (stat.) � 0:06 (sys.) of that at � 100 � C. Using the reported light yield at � 100 � C (46 photons/keV), the measured light yield at 1 � C corresponds to 29 photons/keV. This result shows that liquid xenon scintillator provides high light yield even at room temperature.