High-accuracy measurement of the emission spectrum of liquid xenon in the vacuum ultraviolet region

Autor: Kiwamu Saito, Yuya Endo, Shogo Nakamura, Tomiyoshi Haruyama, Shinichi Sasaki, Keiko Fujii, Katsuyu Kasami, Yui Torigoe, Hiroko Tawara, Satoshi Mihara
Rok vydání: 2015
Předmět:
Zdroj: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 795:293-297
ISSN: 0168-9002
DOI: 10.1016/j.nima.2015.05.065
Popis: The emission spectrum of cryogenic liquid xenon in the vacuum ultraviolet region was measured by irradiating liquid xenon with gamma-rays from a radioactive source. To achieve a high signal-to-noise ratio, we employed coincident photon counting. Additionally, the charge of the photo-sensor signals was measured to estimate the number of detected photons accurately. In addition, proper corrections were incorporated for the wavelength; response functions of the apparatus obtained using a low-pressure mercury lamp, and photon detection efficiencies of the optical system were considered. The obtained emission spectrum is found to be in the shape of a Gaussian function, with the center at 57,199±34 (stat.)±33 (syst.) cm−1 (174.8±0.1 (stat.)±0.1 (syst.) nm) and the full width at half maximum of 3328±72 (stat.)±65 (syst.) cm−1 (10.2±0.2 (stat.)±0.2 (sys.) nm). These results are the most accurate values obtained in terms of the data acquisition method and the calibration for the experimental system and provide valuable information regarding the high-precision instruments that employ a liquid-xenon scintillator.
Databáze: OpenAIRE
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