Representation of Slowing Down Functions in Water by Synthetic Kernels (open access)

Representation of Slowing Down Functions in Water by Synthetic Kernels

Fermi, Anderson, and Nagle's experimental distribution of Indium resonance neutrons around a point source of fission neutrons in water has been fitted by analytic expressions which are source functions in the two-group, three-group, Fermi and Christy-Wheeler pile theory. The Christy-Wheeler function (exponential followed by a Gaussian) is the best fit; the two-group function (exponential) is slightly better than the Fermi Gaussian.
Date: June 1, 1944
Creator: Cahn, Albert, Jr.
System: The UNT Digital Library
Metallurgical Laboratory, Nuclear Physics Division, Report for the Month Ending May 25, 1944 (open access)

Metallurgical Laboratory, Nuclear Physics Division, Report for the Month Ending May 25, 1944

Technical report with short reports from the (1) Experimental Nuclear Physics Group; (2) Theoretical Physics Group ; (3) Lattice Design Group; (4) Pile Design Group; (5) Exponential Experimental Group; (6) Radiation Group; and (7) Shielding Group.
Date: June 14, 1944
Creator: Fermi, Enrico, 1901-1954
System: The UNT Digital Library
The Effect of the Maxwell Distribution of Velocities on the Neutron Density and Diffusion Length in a Metal Sphere (open access)

The Effect of the Maxwell Distribution of Velocities on the Neutron Density and Diffusion Length in a Metal Sphere

The change in the simple [formula] distribution of neutrons in a spherical lump of uranium caused by the distribution in velocities of thermal neutrons is calculated. If the calculated curve is fitted as well as possible by a simple [formula] curve, it is shown that the value of [formula] obtained in this way is a function of [formula], the radius of the sphere. For small radii the [formula] obtained in this manner will be as much as 25% greater than the [formula] corresponding to average velocity neutrons. The change in the thermal utilization caused by the distribution in velocities is discussed. The flux of neutrons into a sphere is calculated taking into account the velocity distribution and this is compared with the usual theory.
Date: June 27, 1944
Creator: Plass, Gilbert N.
System: The UNT Digital Library
Jacket Temperature Near End of Slug (open access)

Jacket Temperature Near End of Slug

Some situations which give rise to a hot ring around the slug near the end are considered; namely rounded slug ends in the long cartridge design, and the Wilkins effect in the current unbonded short slug design.
Date: June 23, 1944
Creator: Young, Gale Jay
System: The UNT Digital Library