Properties of a NaI(Tl) total absorption spectrometer for electrons and γ-rays at gev energies

In the past two years we have reported on the properties of large NaI(Tl) crystals as total absorption spectrometers foy electrons and γ-rays in the range 0.1 to 14 GeV
^1,2
. We have recently made similar measurements on a NaI(Tl) spectrometer which is both larger than any we have used before and assembled in a different way. In the following paragraphs we indicate the results of our initial tests.