The analyzer can be operated either internally or externally. The 10 ma germanium discriminator is quiescently biased to 8.5 ma in its low-voltage state. An input signal current of 3.5 ma or more triggers it to its highvoltage state. This triggers the oscillator. The oscillator signal is buffered and mixed in the bridge modulator with the reference radiofrequency signal from the cyclotron. The low-frequency beat note from the bridge moduiator is squared up and passed to the beat zero univibrator which generates 0.7 mu sec signals each time the beat note passes through zero from positive to negative. The trailing edge of the beat zero unlvibrator is employed to terminate the time-of-flight measurement and to control the servo measurement. Drawings are included. (M.C.G.)

None

This document details activities of the irradiation processing department during the month of December, 1961. Al general summary is included at the start of the report, after which the report is divided into the following sections: Research and Engineering Operations: Production and reactor Operations; Facilities Engineering Operation; and NPR project.

Resesrch and development activities in fixation of radioactive wastes are reported. Spray calcination, batch calcination, in-tank solidification, off- gas treatment, sorption snd extraction studies, low- and intermediate-level wastes, and high-level wastes are discussed. (M.C.G.)

A table of functions is presented that simplifies the evaluation of the Debye-Waller factor which gives the fraction of recoil-free gamma ray processes in Mbssbauer effect studies. A graph of the recoil-free fraction, f, as a function of the ratio of the Debye temperature to the crystal temperature for selected recoil energy to Debye temperature ratios is included for rapid estimation of f. (auth)

The monthly report for the Hanford Laboratories Operation, May 1961. Reactor fuels, chemistry, dosimetry, separation processes, reactor technology, financial activities, biology operation, and physics and instrumentation research, operations research and synthesis operation, programming, laboratory auxiliaries operation, and technical administration operation are discussed.