[en] A solid state dosimeter was developed with Tris (hydroxy methyl) amino methane which can measure the gamma doses in the range 0.1 Mega Rad (1 KGy) to 50 Mega Rad (500 KGy). This dosimeter is useful for measuring high dose envisaged in radiation processing of food, sterilization of medical products and high energy pulsed electron accelerator (LINAC). The paper describes the preparation of dosimetric grade pellets, measurements of the excitation and emission spectra and also the analysis of the emission spectrum. (author). 2 figs