%MurNBjordancharpie020052; ]> Memorandum from Raymond L. Murray to Clifford K. Beck Machine readable transcription Murray, Raymond L. Creation of machine-readable version: Russell S. Koonts Creation of digital images: Russell S. Koonts Conversion to TEI.2-conformant markup: Russell S. Koonts ca. 9 kilobytes NCSU Libraries Raleigh, NC Modern English, MurNBjordancharpie020052

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 25 October, 2000

Nuclear Reactor Digitization Project

Raymond L. Murray Reactor Project Notebook

 Illustrations have been included from the print version. Scanned by Russell Koonts with Photoshop 5.0 software. Memorandum from Raymond L. Murray to Clifford K. Beck Raymond L. Murray

1 p. Manuscript copy consulted UA 105.16

Prepared for the North Carolina State University Science and Technology Electronic Text Center

The lineation of the manuscript has been maintained and all end-of-line hyphens have been preserved.

Keywords in the header are a local Science and Technology Electronic Text Center scheme to aid in establishing analytical groupings.

Library of Congress Subject Headings February, 1952 English LCSH manuscript 24-bit color: 400 dpi Memorandum from Raymond L. Murray to Clifford K. Beck Typescript 1 p. February, 1952 MurNBjordancharpie020052

OFFICIAL USE ONLY February, 1952 TO: Clifford K. Beck 1. Control Mechanisms FROM: Raymond L. Murray 2. Sources CC: Dr. A. C. Menius, Jr. Dr. N. Underwood Dr. A. W. Waltner Dr. G. N. Webb

1. When in Oak Ridge, I asked Walter Jordan about supplies for spur gear assemblies. He referred me to Tom Cole, who has designed the control system for the "swimming pool" reactor. He had used an available NEPA product, which was much too bulky for the job. He recommends spur rather than worm gears because of friction, and that we should get standard gears from the Boston Gear Works and design the assembly to our own needs

2. Discussed artificial neutron sources with R. Charpie of Y-12. The Isotope SB124 is a high energy gamma emitter, which gives neutrons by a (γ,n) reaction on Be. Its virtus is that it gives a high intensity, the anatomony being of short (60 da) half life.

Two References on the properties of sources should be obtained: <hi rend="underline">Neutrons from Alpha Emitters</hi>, H. L. Anderson, Report #3, Nuclear Science Series, National Research Council (2101 Constitution Ave., Washington, D. C.)   <hi rend="underline">Photo Neutron Sources</hi>, A. Watlenberg, Report #6, same series.

Before stating positively that an Sb source would be activated in our reactor to such a degree that its life is extended, I should like to study some of the data on yields in these reports. Continous neutron irradiation might be needed, actually.