The inelastic interactions of negative pi mesons with protons at 374, 417, and 454 Mev incident pi kinetic energy are studied by measuring the differential distributions of finalstate neutrons. The pi source is an internal target of the Berkeley 184-inch synchrocyclotron. A magnetic beamtransport system momentum-anaiyzes and focuses the pi beam at a liquid hydrogen target located in an adjacent shielded experimental area. The time-of- flight distribution of neutral particles is measured at various laboratorysystem angles between 10 and 65 deg. Neutral particles are detected by observing the charged products of their interactions in plastic scintillator. The time-of- flight information is determined electronically by time-to-height conversion and pulse-height analysis. The time resolution of the total system is 1.0 nsec. Detected neutral particles accompanied by charged particles are separated by the electronic system from those not accompanied by charged particles. Analysis presuming the principal inelastic reactions to be pi /sup -/p yields pi /sup +/ pi /sup -/n and pi /sup -/p yields pi /sup 0/ pi /sup 0/n separates the time-of-flight spectra into gamma rays, neutrons from the reaction pi /sup -/p yields pi /sup 0/n, and inelastic neutrons. Calculated values of the neutron- detection efficiency are used in the …

Nonlinear vibration is discussed and compared with linear vibration. Nonlinear vibration phenomena are described, and methods for testing a nonlinear system, collecting and analyzing the data, and interpreting the results are suggested. (D.L.C.)

This report is a Historical Review of General Revenue Financing in Social Security.

Monthly newsletter of the High Plains Underground Water Conservation District No. 1, discussing the field of underground water. Topics include profiles of water conservation research, annual pre-plant soil moisture survey data, annual Winter Water Level measurement data, and information about the latest water conservation tips.

A title list of 119 reports published between 1952 to mid 1960 is given.

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A summary is given of studies carried out with the UO/sub 2/-- NaK slurry system to ascertain its potential properties as a fuel for advanced reactor system. Included are the studies of the physical-chemical properties of the slurry, the early loop investigations, in-pile studies, and the exploration of the engineering system behavior of the material. The work was carried out in three different institutions. The Argonne Nattonal Laboratory was responsible for the early loop studies and the in-pile work, as well as some phases of the physicochemical behavior. The engineering studies were carnied out for ANL by the Mine Safety Appliances Corporation, Callery, Pennsylvania, The physicochemical studies were performed by the Armour Research Foundation, Chicago, Illinois. The studies under the program were relatively modest, but they did serve to demonstrate some of the attractive properties of the material as well as its limitations. Specifically, the dropout behavior was demonstrated in piping a tank systems in both conventional and specially designed systems, Hydraulic characteristics were demonstrated, and it was observed that a 10 vol% slurry was the maximum concentration that could convenientiy be handle in conventional engineering systems. In-pile performanc of the slurry was demonstrated and it was concluded that slurries …

Effects due to elementary particle-like collisions within nuclear matter have been observed in several nuclear reactions caused by pions and protons. Simple nuclear reactions of the form ZA(a,an)Z/sup A-1/ and Z/sup A/(a,ap)(Z-1)/ sup A-1/ have excitation functions that are sensitive to changes in the elementary-particle cross sections. The excitation function for the reaction C/ sup 12/( pi /sup -/, pi /sup -/n)C/sup 11/ is measure d from 53 to 1610 Mev by bombarding targets of plastic scintillator with pions. The intensity of the pion beam is monitored with a two-counter telescope and 40 Mc scaling system. The scintillator target is mounted on a phototube and becomes the detector for the carbon-11 positron activity. Corrections are made for muon contamination in the beam, coincidence losses in the monitor system, carbon-11 activity produced by stray background at the accelerator, carbon-1l activity produced by secondaries in the target, and the efficiency of the carbon-11 detection system. The C/sup 12/( pi /sup -/, pi /sup -/n)C/sup 11/ cross sections rise to a peak of abo ut 70 mb at 190 Mev, that corresponds to the resonance in freeparticle pi /sup -/n scattering at 190 Mev. Calculations based on a knock-on'' collision mechanism and sharp-cutoff …

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Abstract: A method is presented of predicting the shock response of a friction-damped vibratory system.

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This document provides details of activities of the Fuels Preparation Department during the month of October 1962. (IF)

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This report discusses two questions: (1) What is the legal basis for the FCC's jurisdictional authority to promulgate the Fairness Doctrine, (2) What is the normal way in which dissatisfied parties may attempt to have a ruling eliminated or amended.

Report of the U.S. Army Engineers describing the geography of pecan bayou watershed colorado, including the likelihood of floods and benefits of flood control, as well as ...

Annual report of the Brookhaven National Laboratory describing the lab's goals, activities, and research during fiscal year 1966.

Annual report of the Brookhaven National Laboratory describing the lab's goals, activities, and research during fiscal year 1967.

Annual report of the Brookhaven National Laboratory describing the lab's goals, activities, and research during fiscal year 1965.