^(99)mTc is an ideal single-photon emitter,because of its favorable half-life(6.01 h),photon energy(140.5 keV),and radiopharmaceutical chemistry[1;2].It is reported that ^(99)mTc has been used in about 30 million medical diagnostic procedures annually throughout the world[3].At present,most of ^(99)mTc is produced from fission product ^(99)Mo which obtained from the neutron irradiated ^(235)U.The methodologies along with the separation of ^(99)mTc from fission ^(99)Mo indicates that availability of ^(99)mTc is ensured in the form of the widely used ^(99)Mo/^(99)m Tc alumina column generator.But up to now,the best alternative to the use of fission ^(99)Mo based alumina column generator has not yet been identified for widespread use.Thus,the study of ^(99)Mo/^(99)m Tc alumina column generator is most essential.
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