DEVELOPMENT OF AN ACTIVE ~(238)UF_6 GAS TARGET

摘要

Detailed studies of the fission process, e.g., the search for parity nonconservation (PNC) effects, the energy dependence of fission modes or the population of fission isomers, depend on high quality data, therefore requiring high luminosities. An active gas target containing uranium may overcome the deterioration of energy and angular resolution caused by large solid target thicknesses. A single Frisch-grid ionization chamber has been built to test a mixture of standard counting gases (e.g., argon) with depleted uranium hexafluoride (238UF_6), utilizing a triple alpha source to evaluate signal quality and drift velocity. For mass fractions of up to 4 percent of ~(238) U the drift velocity increases with rising UF_6 content, while a good signal quality and energy resolution is preserved.