A simple method of solving for the phase shifts of the pion-proton scattering is presented. The rapid solution afforded can be utilized, as the Ashkin diagrams have been employed, to give starting values to an electronic computer or alternatively to analyze with more ease the variation of the phase shifts as a function of the input data in terms of the coefficients of the angular distributions. A new plot of a function of the total cross section versus the pion energy is introduced. The nearly straight line resulting should help to evaluate the experimental data.

Although the results reported herein are rather encouraging and show the possibilities of utilizing flotation to increase recoveries and in some instances grades, they should not not be considered an optimum. As stated previously, time did not permit a detailed investigation of all reagents an conditions to obtain maximum grades and recoveries, but sufficient data, with enough typical samples, have been obtained to indicate a definite trend and encouragement for further studies. A comparison of the flotation results obtained with each of the samples is presented in Table 2.

Sixty-nine cases of suspected brain lesions were studied with both routine isotope encephalometry and the graphic method of analysis. Of thirty-two space occupying lesions, 68.7% were correctly diagnosed by both means, while 18.8% were negative with the routine method but were positive with the graphic method. The overall accuracy of locating a tumor when present was 87.5%. The proposed design for a scanning scintillation coincidence isotope-encephalometer is discussed.

As previously reported, zirconium undergoes large dimensional increases after scaling in air in a critical temperature range, 700 degree-1050 degree C. This finding was observed with specimens of a constant thickness (0;062 in.) To study the thickness effect, a number of specimens ranging in thickness from 0.020 to 0.200 in. were scaled in air at a temperature (900 degree C) where the growth is a maximum for a given time. Both cold rolled iodine sheet and forged iodide bar stock were used. to determine the effect of orientation, specimens from the forged bar were obtained such that the scaling surface was either parallel to or perpendicular to the long axis of the bar.

Gamma plutonium is found to be orthorhombic with eight atoms in a unit cell of dimension (1t 235 degree C) [formula]. The calculated density is [formula]. The space group is Fddd and the positions of the eight atoms are: [formula]. Each plutonium atom is bonded to ten others at an aver distance of [formula], four being at [formula], two at [formula] and found at [formula]. The mean linear coefficients of thermal expansion are found to be [formula].

Data which determine points on the Hugoniot curves of fourteen solids are given in the technical report.

Equipment lists and operating procedures are present for a laundry designed to wash contaminated clothing.

This technical report summarized studies in the high temperature scaling of zirconium, and covers the period from March 1, 1955 to December 15, 1955. One technical progress report covered the progress of the investigation from April 1, 1953 to march 1, 1955. The previous work was concerned largely with the scaling behavior of zirconium in air, pure oxygen, pure nitrogen and mixtures of oxygen and nitrogen. The major finding arising from these studies was that the peculiar scaling behavior of zirconium in air -- tremendously accelerated scaling rate after a critical time, along with large dimensional increases of the metal and a change in the nature of the scale -- was evident with mixtures of oxygen and nitrogen, but not with pure oxygen or pure nitrogen. This suggested that the joint presence of oxygen and nitrogen is required for the various peculiar phenomena to set in. In a continuation of the work reported in the First Technical Progress Report, studies now underway include the dependency of the various peculiar phenomena noted above on the gas composition, change in gas composition, shape and size of the piece, temperature and time, previous surface treatment, etc. The material and procedures employed in these …

The liquid metal level instrument will operate at tank temperatures up to 1000 F. Overall system accuracy depends on operating conditions, as described in the report. Test accuracies from 2 to 8% have been obtained from full to empty tank. The primary detector unit successfully passed navy HI shock test.

Studies are being made on the effects of variation of aluminum content, heat treatment, surface preparation, and other metallurgical factors on the room temperature ductility of Al-- Fe alloys. It is estimated that approximately 65 percent of the proposed research has been completed over the first eight and one-half months of the contract period.

A fundamental study is presented comparing the electric properties for materials of "normal" dielectric constant (Al/sub 2/O/sub 3/ and MgTiO/sub 3/) with those of high dielectric constant (TiO/sub 2/, CaTiCO/sub 3/, SrTiO/sub 3/, STABa/sub 0.65Sr/sub 0.35/! STATiO/sub 3/, and BaTiO/sub 3/). Single crystals and ceramics, as far as available, were investigated from d-c to the microwave range as function of time, temperature, field strength, and prehistory. Three types of relaxation spectra were identified, one caused by dipolar groups in unequal double wells, the other two by charge carriers stopped in the volume of the material or in front of the electrodes, respectively, O-H groups in rutile, identified by infrared absorption, seem to cause a dipolar spectrum by thermal excitation leading to hydrogen-bond formation. The shielding of dipoles by countercharges (dipole halos) is probably responsible for the unequal potential wells and likely to be a phenomenon of general importance. Electrons can be injected into rutile and other titanates by field emission. Parallel to the optic axis of rutile, the conduction currents reach especially high values because of an unhampered Ti/sup 3+/ yields Ti/sup 4+/ exchange, and thermal breakdown by field-emission currents occurs. Pure titania materials at high temperatures become very lossy …

An experiment is described in which high energy nuclear interactions in the range of energies 10(10)-10(12)ev were analyzed by means of a cloud chamber n a magnetic field. Measurements of ionization and momentum made possible the identification of electrons and mesons to about 20 Bev/c. Protons, K-mesons and hyperons could not be identified unambiguously among themselves, except in very limited regions of momentum. The primary particles were cosmic-ray nucleons and a possible fraction of Pions, the target nuclei were carbon and the velocities of the primaries were determined from balance of momentum in the center of mass system. A total of 41 events were analyzed, and the results compared to previous experimental work and the predictions of the theories of Heisenberg and Landau. The measurements made included the transverse momenta of the secondaries and their average energy in the CMS, the energy and angular distribution of the Pions and heavy particles (protons, K-mesons, hyperons) in the CMS, the inelasticity of the collision, the multiplicity of the showers, the percentages of strange particles and the positive excess of the secondaries.

Monthly letter report on the research on the development of a beta-ray particle size analyzer (BPSA).

Attempts to secure a high degree of synchronization of cell division of the Krebs mouse ascites carcinoma, by combined use of aminopterin and citrovorum factor, and by use of colchicine and N-acetyl colchinol, were unsuccessful. In the course of the work, a new method for securing smears of ascites tumor cells was out, which we believe will be found useful

The purpose of the test was to fill the condensate storage tank and the Condensate System and obtain satisfactory preliminary operation. The components of the Condensate System performed adequately and satisfactorily with the exception of fill control valve (M9-VI). This valve (M9-VI) is not used in the current operation procedure.

The purpose of the test was to insure satisfactory operation of the turbine after overhaul of the turbine which was completed February 1, 1959. The operation of the turbine during this start-up was satisfactory.

The direct reading height gauge is a new and fast operating instrument designed primarily for checking hole patterns, but it can also be used for a number of other purposes as well. This report gives a brief review of what the gauge is, what it will do, and how it is operated. Speed and the elimination of most of the sources of error are its chief attributes.

The mathematics has been developed for the determination of the radial coupling coefficient for a hollow cylinder of electro-strictive material whose length is small compared to its outside diameter.

In homogeneous nuclear reactors significant quantities of radioactive inert gaseous fission products must be separated from the fuel solution for disposal. The present disposal scheme, which is employed on the HRT, is to pass the mixture of fission product gases and oxygen through a charcoal adsorption bed. the oxygen passes through the bed relatively un-adsorbed, but the radioactive inert gases are adsorbed and are displaced from the bed bed very slowly giving the gases a much greater residence time than would exist if no bed were used. This long residence or "holdup" time permits the short-lived inert gases to decay away before emission to the atmosphere and thus greatly reduces the safety hazard produced by disposal of the gases to the atmosphere. The same effect could be obtained by using a large holdup tank, but the charcoal bed is much more compact and thus required less shielding.

This memorandum is a compilation of general information concerned with the arrangement of elements on a control panel. Arrangement considerations that lead to to improved ease and accuracy of operation are presented to assist the engineer in designing new control panels.

Certain solutions of the cylindrical wave-equation, such as the Possio integral, which are needed in the investigation of 2-dimensional weak-shocks are are determined in this paper.

A survey of reactors believed to be suited for most effect competition with conventionally fueled power plants in the continental USA. Basic design data are summarized for a light-water-moderated boiling reactor and aqueous homogeneous reactors.

The purpose of the test was to determine the radiation levels in a Reactor Plant Boiler Compartment with the respective loop shut down and the remainder of the plant operating at power. The highest radiation levels recorded in the IC Boiler Compartment were located in the vicinity of the reactor coolant loop pipe penetrations of the Compartment. Except for the above mentioned areas, personnel could continuously occupy the IC Boiler Compartment without exceeding the maximum dose rate of 300 mr per week. The areas in the vicinity of the reactor coolant pipe penetrations, however, could be occupied only 1 to 2 hours per person per week because of the high radiation levers (200-250 mr/hr) present at these locations.

The purpose of the test was to observe the extent and location of corrosion, crud deposits and defects in components of the primary fluid system and its auxiliaries. This observation will allow an estimate to be made of the future behavior of the affected parts. The test also provides for obtaining corrosion products and crud samples for analysis as necessary for planning remedial actions. This test was limited to the 1D Main Coolant Pump which failed November 3, 1958. The pump failed after 2234 hours of operation on "fast" speed and 887 hours at "slow" speed. An inspection for corrosion was not conducted but smear samples were taken and a radiochemical analysis made. This analysis showed the following isotopes were present in the smear sample: Co38, Co60, Fe59, Mn54, Hf191 and Zr95. The upper and lower radial pump bearings and journals were severely scored and galled while the thrust bearing and runner appear to be in good condition.