HAFNIUM PRODUCTION FROM THE REACTION OF 6.3-24.6 MEV NUCLEON AR-40+W-NAT/

The yields of known hafnium isotopes produced in 6.3-24.6 MeV/nucleon Ar-40+W-nat reactions were determined by gamma-ray spectroscopy follow ing chemical separation, The excitation function, the FW value, and is otope distributions were obtained, It was deduced that using HIRFL ene rgy heavy ions to synthesize new neutron-rich nuclides in the A > 170 region is possible, Using thick target or multi-thin target can obviou sly increase the yield of a new neutron-rich nuclide, Increasing proje ctile energy is not always helpful to synthesize a new neutron-rich nu clide.