The following document is an interim report on studies made to determine the optimum time-temperature treatment to produce a recrystallized grain structure in gamma extruded uranium."

A report which describes a number of experiments conducted to compare the effects of different methods of surface preparation on x-ray diffraction patterns of uranium obtained by the spectrometer technique.

Technical report containing short articles on (1) Determination of physical constants for U233; (2) Determination of decay chain of U233; (3) Extraction of U233; (4) Extracting solvents for uranium; (5) Factors affecting the extraction uranium and thorium by organic solvents, especially ether; and (6) Analysis of ore samples for protoactinium.

A model for the capture spectrum of uranium is introduced in which levels occur at 7, 30, 30+D, 30+2D, ..., ev. Gamma ray and neutron widths are derived from the experimental data for values of D between 10 and 25 ev. The constants of the 7 volt level prove to be independent of D. Extrapolation, using the one level formula, gives a capture cross section at (1/40) ev of 4.9 x 10(24) cm2; this number is, however, quite sensitive to the value taken for the resonance activation. Both neutron and gamma ray widths for the higher levels are approximately proportional to D.

This report describes the flow meter for measuring air-flow rate through special hoods that allow the decrease in flow rate.

From Introduction: "An apparatus that gives a quick and an accurate measurement of the rate of discharge has been has been designed by the NACA and is described in this report."

The multiplication factor and minimum pile size for a multiplying pile using UO2 powder of density 1 have been computed. It appears that a k of 1.0177 is possible for a volume ration of V/V001=3.33.

Minute meetings for the UTMB Committee on Services and Development, September 24, 1945, discussing various issues under the committees purview.