Author/Authors :
Baldini، نويسنده , , A. and Bemporad، نويسنده , , C. and Cei، نويسنده , , F. and Doke، نويسنده , , T. and Grassi، نويسنده , , M. and Grebenuk، نويسنده , , A.A. and Grigoriev، نويسنده , , D.N. and Haruyama، نويسنده , , T. and Kasami، نويسنده , , K. and Kikuchi، نويسنده , , J. and Maki، نويسنده , , A. and Mashimo، نويسنده , , T. and Mihara، نويسنده , , S. and Mitsuhashi، نويسنده , , T. and Mori، نويسنده , , T. and Nicolٍ، نويسنده , , D. and Nish، نويسنده ,
Abstract :
An 800 l liquid xenon scintillation γ -ray detector is being developed for the MEG experiment which will search for μ + → e + γ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100 l prototype with an active volume of 372 × 372 × 496 mm 3 to study the scintillation light absorption. We have developed a method to evaluate the light absorption, separately from elastic scattering of light, by measuring cosmic rays and α sources. By using a suitable purification technique, an absorption length longer than 100 cm has been achieved. The effects of the light absorption on the energy resolution are estimated by Monte Carlo simulation.
Keywords :
Liquid xenon , scintillation detector , Purification , Calorimeter
