研究目的
Investigating the influence of neodymium concentration on the light attenuation length in liquid organic scintillators for applications in detecting rare events like neutrinoless double beta decay.
研究成果
The light attenuation length in a neodymium-containing LAB solution was measured to be 1.95 ± 0.14 m for a concentration of 4.7 g/L. This result aligns with previous findings, indicating that neodymium's self-absorption does not significantly affect transparency at large distances. The study provides valuable insights for designing detectors for rare event searches.
研究不足
The study's accuracy is limited by the spectrophotometer's measurement error and the non-collimated nature of the photon source, which may lead to light loss through the tube's side walls. The method's applicability is also constrained by the specific spectral characteristics of the neodymium ions.
1：Experimental Design and Method Selection:
The study used a 1-m-long optical cell to measure light attenuation in neodymium-containing solutions. A NaI(Tl) crystal irradiated by Cs-137 gamma rays served as the photon source, and a Hamamatsu R878 photomultiplier detected the photons. A two-exponent approximation modeled the light attenuation.
2：Sample Selection and Data Sources:
Aqueous and organic solutions of neodymium were prepared with specific concentrations. The emission spectrum of NaI(Tl) crystal was used to simulate the scintillator's photon emission.
3：List of Experimental Equipment and Materials:
Optical cell (1 m long), NaI(Tl) crystal (25 × 25 mm), Cs-137 gamma source, Hamamatsu R878 photomultiplier, UV-VIS spectrophotometer (PerkinElmer Lambda 35), and various neodymium compounds.
4：Experimental Procedures and Operational Workflow:
The NaI(Tl) crystal was moved along the tube to vary the distance from the photomultiplier. The photon intensity was measured at different distances to determine the light attenuation length.
5：Data Analysis Methods:
A two-exponent approximation was applied to the data to model the light attenuation length, considering both geometric factors and absorption by neodymium ions.
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