[en] The reaction of N-hydroxy methyl acrylamide (NHMA) with the e_aq^-, ^·OH and ^·H radicals of water radiolysis were studied in dilute solutions using pulse radiolysis technique. The rate constants for the initiation reaction of NHMA monomer with hydrated electron (5.6x10⁹ dm³ mol^-1 s^-1), hydroxyl radical (3.4x10⁹ dm³ mol^-1 s^-1) and H atom (3.5x10⁹ dm³ mol^-1 s^-1) were found to be diffusion controlled. The reactions of some oxidizing radicals like N₃^·, SO₄^·- and reducing species like COO^·-, (CH₃)₂^·COH with NHMA have also been studied. The results show that oxidation and reduction potentials for NHMA/NHMA^·+ and NHMA/NHMA^·- couples are between 1.3 and 2.4 V and more than -1.9 V, respectively. Poly(NHMA) (PNHMA) hydrogels were synthesized by γ-irradiation and the conditions of synthesis such as total dose, dose rate, effects of oxygen and nitrogen, and concentration of monomer on gel formation characteristics were investigated. Maximum gel content (64%) has been achieved for 4 kGy dose (dose rate, 8k Gy h^-1) for air free 10% (w/v) monomer solution