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Servo System for Magnetic Controlled Constant Intensity Flat Top Beam Spill-Out

Description: A uniform intensity flat top spill-out cannot be obtained by manual control for two reasons: 1. The horizontal density of the internal beam of the Cosmotron is far from uniform. As a result, a manually controlled linear motion of the internal beam into a target will result in a non-uniform spill-out intensity. 2. Stability requirements of the Cosmotron magnet voltage are not easily met without feedback because of inherent component stability. The proposed servo system will sense the external be… more
Date: November 21, 1961
Creator: Cottingham, J. G.
Partner: UNT Libraries Government Documents Department
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Neutron Capture Gamma Ray Spectra

Description: A series of measurements was performed to investigate the gamma ray spectra, in the region from about 100 kev to about 3 Mev, resulting from the capture of thermal neutrons in a number of elements. The purpose of the experiment was to supplement the high energy capture gamma ray data in order to remove some of the ambiguities from the proposed energy level schemes and to obtain information for the Shielding Group of Brookhaven National Laboratory on elements normally found in reactors.
Date: November 1, 1953
Creator: Reier, Melvin
Partner: UNT Libraries Government Documents Department
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The Cosmotron Radio Frequency Accelerating System

Description: The proton beam in the Cosmotron is accelerated to an energy of 2.3 billion electron volts by a radio frequency voltage which is impressed across an insulated gap in the ferrite loaded accelerating cavity of the vacuum chamber. To maintain a constant orbit radius as the beam is accelerated, the frequency of the accelerating voltage must increase from the initial value of 370 kc/sec to 4200 kc/sec during the one second magnet pulse. Over the entire 11:1 frequency range, a minimum gap voltage of … more
Date: November 24, 1953
Creator: Rogers, Edwin, J. & Flotkin, M.
Partner: UNT Libraries Government Documents Department
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Pipet Filler

Description: A number of pipetting aids are commercially available which obviate the necessity of filling pipets by oral suction. Most of the commercially available devices involve fitting the pipet into a soft tight fitting bushing and filling by means of either a piston or a rubber bulb. The pipet is then emptied by means of a valve control which permits, it is claimed, a dispensing accuracy of 0.1mL. It is at once apparent that the probable error (10% for a 1 mL. pipet) is considerably greater than is pe… more
Date: November 18, 1952
Creator: Finston, H. L. & Strickland, Gerald
Partner: UNT Libraries Government Documents Department
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Serial Reports on Start-Up Experiments. No. 1 The Hot Rod Experiment

Description: The purpose of this new series of reports is to present in roughly finished form the results of the various start-up experiments on the BNL reactor as soon as the analysis of the experimental data is completed.
Date: November 29, 1950
Creator: Chernick, J. & Kunstadter, J. W.
Partner: UNT Libraries Government Documents Department
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The Radiolysis and Pyrolysis of Several Polyaromatic Compounds

Description: The radiolysis of several polyaromatic compounds which might be used as coolant material in a reactor was investigated using both gamma and reactor radiation. The compounds selected were naphthalene, anthracene, naphthacene, pyrene, phenanthrene, 1, 2 benzanthracene, chrysene, triphenylene, 9, 10 dihydrophenanthrene, phenazine, 7, 8, benzoquinoline and m-phenanthroline, in addition to the uncondensed ring compounds, biphenyl, ortho, meta and para terphenyl and bibenzyl. Gas yields, percentage d… more
Date: November 18, 1963
Creator: Weiss, J.; Collins, C. H. & Sucher, J.
Partner: UNT Libraries Government Documents Department
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Reflections on Pools

Description: A pool of material in steady-state turnover is a collection of identical molecules from which deletions are made at a constant rate, along with simultaneous addition of new identical molecules at the same rate, the total pool size remaining unchanged. It is of interest to consider what may be expected in the way of such pools among the various chemical species which can be isolated from biological systems. It is clear what the model requires, i.e. any molecule belonging to the pool must have as… more
Date: November 8, 1963
Creator: Steele, Robert
Partner: UNT Libraries Government Documents Department
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A Time-Shared Computer Data Collection System at the Brookhaven Graphite Research Reactor

Description: The increasing complexity of the data of nuclear physics has led to widespread interest in the possibility of utilizing a digital computer for on-line data collection. Through the combined efforts of the Instrumentation Division and the Neutron Physics group at Brookhaven such a system has been placed into operation. Several features of this system are believed to be unique and of interest to research groups centered about a major facility like a reactor or an accelerator.
Date: November 19, 1963
Creator: Chrien, R. E.; Rankowitz, S. & Spinrad, R. J.
Partner: UNT Libraries Government Documents Department
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Perturbation Techniques for the Deflecting Mode

Description: The descriptive parameters of a waveguide with smooth or periodic structure are most easily measured in a waveguide section of suitable length which is transformed into a resonant cavity by placing short circuits at both ends. Measurements of dispersion diagram, phase velocity, group velocity, voltage attenuation coefficient, shunt impedance, field configuration, etc. all involve some form of perturbation technique. The introduction of a perturbing object in a resonant cavity changes the stored… more
Date: November 18, 1963
Creator: Hahn, H. & Halama, H. J.
Partner: UNT Libraries Government Documents Department
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Automatic Bubble Density Measurement with the Hough-Powell System

Description: The Brookhaven Bubble Chamber Group is developing a Hough-Powell fast analysis system (HPD)1 for bubble chamber photographs. High precision measurements are made with a computer controlled flying spot digitizer. We are currently testing the track selection programs for the system. We have just completed a study of a method for automatic bubble density measurements.
Date: November 18, 1963
Creator: Strand, R. C. & Webre, N.W.
Partner: UNT Libraries Government Documents Department
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The Nature of the Hydrogen Bond in the Bifluoride Ion

Description: We undertook the present diffraction study of the bifluoride ion in sodium acid fluoride and the present refinement of the earlier data on potassium acid fluoride with the hope of obtaining more accurate information not only on the position of the hydrogen atom, but also on the vibrations of the ion. We felt that it would be through the combination of information on the motions of the system from diffraction and spectroscopic studies that the question of the symmetry of the ion could be settled… more
Date: November 8, 1963
Creator: Ibers, James A.
Partner: UNT Libraries Government Documents Department
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Lens Opacification in Mice Exposed to Monoenergetic Fast Neutrons

Description: Early effects obtained with monoenergetic fast neutrons in mice have been described elsewhere. Emphasis in this report will be placed on the late effects of lens opacification (cataractogenesis), particularly during the period soon after irradiation with low or fractionated doses of neutrons at two energy levels, or X-rays. Considerations will also be given to the influence of age at time of irradiation upon the induction of lens opacities. Both studies are continuing, with periodic slit-lamp m… more
Date: November 19, 1963
Creator: Bateman, J. L.; Bond, V. P. & Rossi, H. H.
Partner: UNT Libraries Government Documents Department
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RBE of Monoenergetic Fast Neutrons: Cytogenetic Effects in Maize

Description: Investigations on the relative biological effectiveness (RBE) of densely ionizing radiations (with high LET, rate of linear energy transfer) are of importance in both fundamental and applied radiobiology. In the latter, they serve as a basis in setting permissible exposure levels for types of radiation about which little long range experience is available. Some of the best RBE studies have been done on chromosomal aberrations. The difficulty is determining RBE on the basis of chromosomal exchan… more
Date: November 13, 1963
Creator: Smith, H. H.; Bateman, J. L.; Quastler, H. & Rossi, H. H.
Partner: UNT Libraries Government Documents Department
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Reutilization of DNA-Thymine, and Conversion of RNA-Pyrimidines for DNA-Thymine, in Normal Rat Bone Marrow Studies with Tritiated Nucleosides

Description: If one injects into an animal H3-thymidine, 50% of it is incorporated into deoxyribonucleic acid (DNA), within approximately 30 to 45 minutes, while the rest is catabolized. A storage of H3-thymidine for later incorporation into DNA does not occur, on the basis of available evidence. Once incorporated, the label remains bound to DNA until cell death and no unequivocal evidence has as yet been presented to indicate metabolic renewal or intracellular turnover of the DNA molecule. The loss of labe… more
Date: November 13, 1963
Creator: Feinendegen, L. E.; Bond, V. P.; Cronkite, E. P. & Hughes, W. L.
Partner: UNT Libraries Government Documents Department
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Use of Neutron Irradiations in the Brookhaven Mutations Program

Description: In brief, these facilities consist of a 250 KvP X-ray generator; two areas of a research reactor, one a well thermalized unit of moderate capacity and a larger area with a mixed thermal and fast neutron distribution, all of which are used for brief, acute exposure. A 10 acre field, currently with almost 4000 curies of cobalt 60, serves to irradiate entire plants for either short or long periods of time. Recently, the flux density of the thermal column was increased by a factor of 5 over the ori… more
Date: November 13, 1963
Creator: Miksche, J. P. & Shapiro, S.
Partner: UNT Libraries Government Documents Department
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Progressive Epithelial Dysplasia in Mouse Skin Irradiated with 10 MeV Protons

Description: It has been previously reported that within twenty days following bombardment of mice 10 MeV protons (as well as with 20 MeV deuterons and 40 MeV alpha particles) that atypical epithelial hyperplasia developed without underlying recognizable vascular or collagen alterations as predisposing factors. The source of these monoenergetic accelerator-produced heavy ionizing particles was the 60-inch cyclotron of the Brookhaven National Laboratory. The technique employed utilized a variable-thickness f… more
Date: November 3, 1963
Creator: Lippincott, Stuart W.; Jesseph, John E.; Calvo, Wenceslao G. & Baker, Charles P.
Partner: UNT Libraries Government Documents Department
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The Cellular Differences Between Acute and Chronic Neutron and Gamma Ray Irradiation in Mice

Description: It has been well established that even small doses of radiation will shorten life expectancy of animals, and that in general the causes of death are the same for the irradiated as for the normal animals. When x or γ rays are compared with neutrons in their ability to shorten the life span, some interesting differences appear. All available data from different laboratories on the shortening of the life span by x or γ on the one hand and neutrons on the other, have been compared. In spite of the … more
Date: November 3, 1963
Creator: Curtis, H. J.; Tilley, J & Crowley, C.
Partner: UNT Libraries Government Documents Department
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Total Neutron Average Cross Sections in the keV Region and the Optical Model

Description: Many workers have recently attempted to evaluate the P-wave strength function from a measurement of average capture cross sections or average total cross sections in the kiloelectron volt region. The primary interest of these measurements has been to determine the strength of the spin-orbit potential in the optical model. In view of the interest in determining the size of the spin-orbit coupling and in view of the considerable disagreement group has undertaken to measure the average total neutr… more
Date: November 3, 1963
Creator: Jain, A. P.; Chrien, R. E.; Moore, J. A. & Palevsky, H.
Partner: UNT Libraries Government Documents Department
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The Effects of 2.0 BeV Protons in Mice

Description: The Brookhaven proton synchrotron (Cosmotron) is capable of accelerating protons to energies as high as 3.0 BeV. The biologic effects of particle bombardment at these energies have not been investigated but are of considerable radiobiologic interest. In addition, particle beams have long been discussed with regard to their potential usefulness in medical therapy, and actual clinical applications have been made, although at lower particle energies. Recent rapid advances in space technology have … more
Date: November 3, 1963
Creator: Jesseph, John E.; Moore, William H.; Bond, Victor P. & Lippincott, Stuart W.
Partner: UNT Libraries Government Documents Department
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The "N" on "P" Silicon Solar Cell Gamma Ray Dose Rate Meter

Description: The recently developed "n" on "p" type silicon solar cell has been evaluated for application as a high-level gamma radiation dose rate meter. The solar cell ionization current was found to be a linear function of dose rate in a range 10 2 to 10 7 rads per hour. A degradation rate of approximately one per cent per megarad was measured after stabilization with twenty megarads of cobalt-60 gamma radiation. The system has proven to be stable over long periods of time. Temperature dependence correct… more
Date: November 18, 1963
Creator: Mueller, A. C.; Rizzo, P. X. & Galanter, L.
Partner: UNT Libraries Government Documents Department
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Some Applications of the Chase Two-Dimensional Analyzer at Brookhaven National Laboratory

Description: The Chase two-dimensional analyzer is a 64 channel by 64 channel analyzer with a magnetic drum memory and a buffered storage system. The memory capacity is 2 counts per channel. The maximum storage rate is limited by the drum speed and is about 800 counts per second for a featureless spectrum.
Date: November 6, 1962
Creator: Donovan, Paul F.
Partner: UNT Libraries Government Documents Department
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The Escape of Fission Products From an Uranium Rod; Application to the B. N. L. Reactor

Description: Technical report covering the functions of the Oak Ridge reactor, difficulties encountered with cartridge failures in the Oak Ridge reactor, and possible solutions including the incorporation of leak detection systems into the design of the reactor.
Date: November 3, 1968
Creator: Chernick, J. & Kaplan, I.
Partner: UNT Libraries Government Documents Department
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Thermal Conductivity of Graphite

Description: Technical report outlining the differences in conductivity of AGOT graphite and AGHT graphite.
Date: November 28, 1949
Creator: Garth, R. C. & Sailor, V. L.
Partner: UNT Libraries Government Documents Department
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Reactor Operations Division Monthly Report; November 1951

Description: Technical report outlining the downtime given to the Brookhaven National Laboratory nuclear reactor in November compared to previous months.
Date: November 1951
Creator: Powell, R. W.
Partner: UNT Libraries Government Documents Department
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