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Theory of Final State Interactions

Description: Using requirements of analyticity and the unitarity of the S-matrix we obtain the dependence of a transition amplitude on the invariant mass of two particles strongly coupled to other two particle channels. As an example, we consider the production of a Σπ state near the Y*₀ resonance assuming it is coupled to a KN state in an s 1/2 state.
Date: August 20, 1962
Creator: Nauenberg, Michael
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Partner: UNT Libraries Government Documents Department
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Analysis of Cell Population Kinetics

Description: The relation between trace kinetic parameters of cell populations and the statistics used in studies on cell populations is discussed. It is pointed out that responses in cell populations are complex and subject to many perturbations. Some of these are discussed. It is concluded that a complete check list of sources of error is required for studies of great accuracy, and a calculus to help in combining heterogeneous data is needed for studies of systems of great complexity.
Date: 1962
Creator: Quastler, Henry
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Partner: UNT Libraries Government Documents Department
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Resistivity of Vacancy Impurity Pairs

Description: The contribution to electrical resistivity of impurity atoms adjacent to vacancies in metals is calculated. The calculation is based on the Born approximation, which allows separations of the effects of the individual imperfections from interference effects. Lattice relaxation is neglected. The resistivity due to Ag or Zn impurities adjacent to a vacancy in Au is related to the resistivity of the separate imperfections as ∫Ag + vac = ∫ Ag + ∫ vac - 0.11 (∫Ag * ∫vac)^(1/2) ; ∫Zn + vac = ∫Zn + ∫v… more
Date: 1962
Creator: Keller, Joseph M.
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Partner: UNT Libraries Government Documents Department
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The Intentional Use of Antimony and Manganese in Ancient Glasses

Description: Title and Abstract in English, French and German, while paper is in English. The use of manganese as a colorant in ancient glasses has long been recognized and the recent X-ray diffraction measurements of Turner and Rooksby have established that compounds of antimony were used extensively as opacifiers in such glasses. The analysis at Brookhaven National Laboratory of some three hundred ancient western glasses of the second millennium B.C. through the first millennium A.D., of which more than t… more
Date: 1962
Creator: Sayre, Edward V.
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Partner: UNT Libraries Government Documents Department
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Phase Dependence of Carbon-11 Recoil Products in Propane: Evidence for Methylene Insertion

Description: Results are included of a study of the formation of methylene-C complexes in neutron-irradiated propane in the gas, liquid, and solid phases. It is considered that the results support the view that discrete species, such as carbon atoms, methyne, and methylene, react at thermal or near thermal energies in the gas phase accounting for a major fraction of the products. Products which contain Carbon-11 produced in the neutron reactions with propane are tabulated.
Date: 1962
Creator: Stöcklin, Gerhard & Wolf, Alfred P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Error Estimates for Some Unstable Continuation Problems

Description: The purpose of this paper is to give a method of approximating u(x,y) by bounded solutions of the elliptic equation when the given data, F(x), f₁(y), and f₂(y), are known only to within a given error. A priori error estimates for the approximation will be given. Since the method involves the solution of a linear programming problem, a posteriori estimates of the error will also be obtained.
Date: 1962
Creator: Cannon, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inhomogeneity of Dose Distribution in Animals Subjected to Whole Body Irradiation with 250 Kv X-Rays

Description: Even though bi-lateral or more complicated exposure procedures are of considerable importance in "total-body" exposure of large animals or man, these measures may not result in even approximately the same dose to different tissues. Because of body contour, depth-dose patterns determined in a rice-and-wax phantom contoured to the shape of a dog were appreciably different from the calculated values based on published standard depth-dose tables (400 cm² portal: other factors being approximately eq… more
Date: 1962
Creator: Malsky, Stanley J.; Amato, Charles G.; Bond, Victor P.; Robertson, James S. & Roswit, Bernard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vitamin B₁₂ Turnover in Polycythemia and Leukemia

Description: Both vitamin B₁₂ and folic acid are required for blood cell formation and normal bone marrow function, but it is not known if the functional state of the bone marrow influences the metabolism of these vitamins. It is therefore of interest to study the turnover of vitamin B₁₂ in two conditions where blood cell production is allegedly increased. Radiovitamin B₁₂ appears to be more rapidly excreted by patients with chromic myelocytic leukemia and polycythemia vera than by comparison patients wit… more
Date: 1962
Creator: Reizenstein, Peter; Cronkite, Eugene P. & Cohn, Stanton H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Combined Application of Lymph Duct Drainage and Extracorporeal Irradiation of the Blood in the Study of Lymphopoiesis

Description: Extracorporeal irradiation of the blood was prolonged for as long as 38 hours. Red cells are injured by the radiation dose. Hemolysis may commence after 28 hours presumably due to the irradiation. Utilizing extracorporeal irradiation of the blood combined with thoracic duct cannulation, one can measure minima for net lymphocyte input into the peripheral blood from all sources other than the thoracic duct. An unusual and new pathologic picture of lymph nodes and spleen has been produced by extra… more
Date: 1962
Creator: Cronkite, E. P.; Jansen, C. R.; Rai, K.; Cottier, H. & Fliedner, T. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comfort and Support of the Cancer Patient

Description: This paper considers the duty of the physician to provide comfort and care for cancer patients and suggests four tenants for physicians to follow to assist with this: 1) No matter what the patient's condition, the physician shall be always available, even if only to listen and talk. 2) In spite of the ravages of cancer, the patient lives with it. 3.) The patient is an adult under guarantees of the constitution. and 4) The physician will always communicate with the patient. The paper ends with a… more
Date: 1962
Creator: Archenbeau, John O. & Wildermuth, Orliss
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pion Resonances in π⁻-p Interactions at 4.65 Bev/c

Description: This note describes some results of the study of single pion production in π⁻-p interactions at 4.65 Bev/c, using the BNL 20" Hydrogen Bubble Chamber. It is well known that the observability of some of the particle resonances (e.g. 33 Isobar and η) varies markedly with the energy of the incident particle. The ρ meson has been observed in π⁻-p interactions at 1.25 Bev/c and 1.9 Bev/c incident pion energies. Evidence will be shown that this resonance persists with the much higher incident pion en… more
Date: August 9, 1962
Creator: Munir, B.A. & Zorn, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics of Erythroblastic Cell Populations in the Dog, Studied with Tritiated Thymidine

Description: In the erythroblastic series of several species, including man and dog, nuclear pyknosis in the last stages of maturation, before nuclear extrusion, is accompanied by a loss of the ability to synthesize DNA (1, 5). Cells of this group never appear labeled during the first hour after injection of tritiated thymidine. Less mature erythroblastic cells appear labeled or not on early samples, according to their functional status in the cell cycle. DNA synthesis indeed is not seen just before, during… more
Date: 1962
Creator: Odartchenko, N.; Bond, V. P.; Feinendegen, L. E. & Cottier, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Oxidation and Dislocation Mechanism in Fatigue Crack Formation

Description: A discussion concerning the mechanism of extrusion and intrusion formation is presented. A model involving dislocation motions is proposed by which experimental results are explained. In this first stage of fatigue defect formation, it appears that O₂ is not involved. While in the second stage, in which microcracks are formed oxidation is probably important. The effects of oxidation in the third stage, in which cracks of macroscopic size propagate steadily through the area and lead finally to f… more
Date: 1962
Creator: Fujite, F. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physical and Chemical Properties of Particles

Description: Electron microscopy is invaluable in determining the organization of the bacterial cell. In Fig. 1 we see an electron micrograph of a thin section of a single cell of Escherichia coli. There are three prominent regions: (1) the bacterial membrane, (2) the centrally located sparse region in which thin fibrils of DNA are located, and (3) the main body of the cell with densely packed particles. All the particles in the latter area are probably ribosomes. This paper will focus attention on the stru… more
Date: 1962
Creator: Zubay, G. & Bergeron, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Influence of Radiation-Produced Defects on the Precipitation of Carbon in Iron

Description: The severe local damage caused by neutron irradiation of an alloy can create extra sites for the nucleation of phase changes. This effect of enhanced nucleation has been studied in the iron--carbon system. Measurements were made by electrical resistivity, internal friction, and electron microscopy. Two effects were found. When the alloy is irradiated at ambient temperature (~60 deg C) the number of precipitation particles formed and, hence, the rate of precipitation of carbon, is ten times the … more
Date: 1962
Creator: Fujite, F. E. & Damask, A. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electron-Atom Scattering and Nucleon-Nucleus Scattering -- An Analogy

Description: An analogy is drawn between low-energy nucleon-nucleus scattering and low-energy electron-atom scattering. Proper scaling indicates that the Ramsauer resonances ln electron scattering are analogous to the "size'' resonances of nucleon scattering. Total cross sections, angular distributions, and spin polarizations are calculated. An imaginary potential is introduced, and its consequences for direct electron-atom interactions are discussed.
Date: 1962
Creator: Goldberg, Murrey D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Control of Xenon Spatial Oscillations

Description: An automatic delayed reactivity feedback based on exit coolant temperature is shown to lead to an increase in linear stability against xenon oscillations when the delay time is within a few percent of the free period of oscillation. Numerical calculations show that the stabilizing effect extends into the nonlinear range as well. It is shown that dead band control is spatially destabilizing if the dead band width is too small. A width of ± 5% is, however, found sufficient to avoid this form of i… more
Date: 1962
Creator: Lellouche, Gerald S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Invariant Solutions of the Exact Bethe-Saltpeter Equation in General-Mass Case

Description: The invariant solutions of the Bethe-Saltpeter equation in an approximation which is more general than the ladder approximation are found in the case of non-zero exchanged-meson mass. They are expressed as series of "truncated vertex functions," which are certain combinations of the usual vertex functions. The eigenvalues of the coupling constant are determined by a transcendental equation, which is not solved explicitly.
Date: 1962
Creator: Nakanishi, Noboru
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Theory of Point Defect Annealing in Metals

Description: The kinetics of the annealing of point defects, either by migration to sinks or by recombination, is complicated by the occurrence of a variety of simultaneous reactions. An extensive theoretical study of annealing processes is in progress at Brookhaven based on the isolation and combination of simple kinetic steps. When analytic solutions could not be found, computer solutions have been used to obtain useful approximations and to determine their regions of validity. Two migration reaction sche… more
Date: 1962
Creator: Damask, A. C. & Dienes, G. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigations of the Alkaloid Content of Nicotiana Species and Interspecific Combinations

Description: Alkaloid content was analyzed by paper-partition chromatography in the following Nicotianas: (1) 52 species representing all taxonomic sections and centers of geographical distribution. (2) 35 two-species combinations including one species of hybrid origin, 5 F₁ interspecific hybrids, 24 amphiploids and 5 sesquiploids. (3) 14 three-species combinations including 6 hybrids between an amphiploid and a third species and 4 different three-species combinations with doubled chromosome number. (4) 2 f… more
Date: 1962
Creator: Smith, Harold H. & Abashian, Dorothy V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiation Damage in Graphite III. Kinetic Reactions of Interstitial Complexes: An Experimental Study

Description: Dimensional changes can be used to distinguish two mechanisms for the radiation formation and decomposition of interstitial complexes in periodically irradiated graphites. When reaction occurs at both ends of the chain described previously, the rate of formation of interstitial carbon atoms is proportional to the magnitude of the exposure. When reaction occurs at one end only, the rate is initially dependent on exposure and then becomes constant. Short reirradiations after an anneal involve rea… more
Date: 1962
Creator: Schweitzer, Donald G. & Singer, Robert M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plutonium Fuelled Thermal Reactors with High Conversion Ratios

Description: The development of plutonium fuelled power reactors with good neutron economy and low fuel inventory is an important objective of the United States atomic energy program. The present study is concerned with the adaptability of current reactor types for this purpose.
Date: 1962
Creator: Chernick, J. & Srikantiah, G.
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Partner: UNT Libraries Government Documents Department
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Some Control Properties of Reflector Moderated Reactors

Description: The current trend in the design of research reactors is toward heavily loaded cores in which most of the neutrons are thermalized in the reflector before returning to the core. These reactors often have control properties quite different than the usual thermal reactors. In this paper some of these properties are examined and it is shown that extreme care must be used in the design of such reactors.
Date: 1962
Creator: Michael, Paul
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Partner: UNT Libraries Government Documents Department
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Some Methods for Improving the Cylindrical Reflecting Boundary Condition in Cell Calculations of the Thermal Neutron Flux

Description: The thermal flux in an infinite triangular or square lattice of fuel rods is a function of two spatial coordinates, say the radial coordinate, r, and an azimuthal coordinate, θ. If the lattice pitch is large, the flux (especially near the fuel rod) is insensitive to θ, and it is common to assume that the θ variation can be ignored. The flux then varies only in the radial direction and a cylindrical cell is used for calculations. The circular outer boundary of this cell is presumed to reflect ne… more
Date: 1962
Creator: Honeck, H. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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