Gamma radiolysis of ion exchange resins (IER) is widely studied since the sixties, as a function of different parameters (resin type, dose, atmosphere, water content …). However, to our knowledge, there are very few data concerning hydrogen emission from anionic and cationic resins irradiated at high Linear Energy Transfers (LET). In the present work, we focus on the influence of hydration on hydrogen emission, in anionic and cationic resins irradiated under inert atmosphere using Swift Heavy Ions (SHI) and gamma irradiations. The radiation chemical yield of molecular hydrogen is nonlinear with water content for both resins. The molecular hydrogen production depends first on the water form in IER (free or linked) and second on the solubility of degradation products. Three steps have been observed: at lower water content where G(H₂) is stable, at 50%, G(H₂) increases due to reactions between water radiolytic species and the resin functional groups and at high water content, G(H₂) decreases probably due to its accumulation in water and its consumption by hydroxyl radicals in the supernatant.

六十年代以来，人们广泛地研究了离子交换树脂（IER）的伽马射线分解，它是不同参数（树脂类型，剂量，气氛，含水量……）的函数。但是，据我们所知，很少有数据涉及在高线性能量转移（LET）下辐照的阴离子和阳离子树脂的氢排放。在当前的工作中，我们重点研究在惰性气氛下使用Swift重离子（SHI）和伽马射线辐照的阴离子和阳离子树脂中，水合作用对氢释放的影响。两种树脂的分子氢辐射化学产率均与水含量呈非线性关系。分子氢的产生首先取决于IER（游离或链接）中水的形式，其次取决于降解产物的溶解度。已观察到三个步骤：在较低的水含量下，G（H₂）是稳定的，在50％时，由于水分解物与树脂官能团之间的反应，G（H ₂）增加；在高水含量下，G（H ₂）减少可能是由于其在水中的蓄积和通过水的消耗而引起的。上清液中的羟基自由基。