Measurement of the Neutron Total Cross Section of U²³³ from 0.07 to 10,000 ev

The neutron total cross section of U²³³ was measured from 0.07 to 10,000 ev, using the ORNL fast chopper time-of-flight neutron spectrometer. Below 30 ev the neutron energy resolution varied from 0.7 to 1.5% and above 30 ev it was 60 nanosec/meter. A description is given of the measurements, the samples, and some of the errors in the measurements. The errors on the total cross section data are estimated to be from ±0.6 to 1.1% below 1 ev, from 1.1 to 2.5% between 1 and 100 ev, and from 1.5 to 5.5% above 100 ev.