P‐239: <i>Late‐News Poster:</i> Investigation of the Impact of Moisture on the X‐Ray Characteristics of Cesium Iodide Scintillators

We found that when water vapor penetrates into the interior of Tallium Iodide (Cs/:T1) crystal pillars, the pillars would undergo deliquescence and change the morphology, which is going to enhance the probability of visible light scattering. On this basis, a new proposal of Parylene interlayer encapsultn, which enhances the abilt of water vapor barrier and thus improved the M stabilt of Cs/:Tl scintillators, by chemical vapor deposition (CVD) is presented.