摘要
Gas-phase chemical behaviors of short-lived technetium carbonyls were studied by using low temperature isothermalchromatograph (IC) coupled with a 252Cf spontaneous fission (SF) source. Fission products recoiled from the252Cf SF source were thermalized in a CO contained mixed gas, and then technetium carbonyls were formed inreactions of CO gas and various technetium isotopes. A gas-jet system was employed to transport the volatilecarbonyls from a recoil chamber to the IC. Short IC columns made of Fluorinated Ethylene Propylene (FEP) Teflonand quartz were used to obtain the chemical information of technetium carbonyls. The results of 104Tc -106Tc car-bonyls were found to be strongly influenced by theirprecursors, showing the chemical behaviors of 104Mo-106Mo carbonyls, respectively. However, 107Tc and108Tc could represent the chemical information of elementtechnetium, due to their high independent yieldsand very short half-lives of their precursors 107Mo and108Mo.
