Experimental evidences of 95 mTc production in a nuclear reactor

95 mTc has been identified as by-product in some solutions of 99 mTc obtained by irradiation of molybdenum trioxide in a reactor neutron flux. The characterization was carried out using both measurements by gamma spectrometry and half-life determination. The possible ways that lead to the 95 mTc production in a nuclear reactor are discussed.