Resource Type

Excitation Functions for Reactions of Bev Protons on Indium (Master's Thesis) (open access)

Excitation Functions for Reactions of Bev Protons on Indium (Master's Thesis)

Abstract: "Indium was bombarded with protons in the energy range 2 to 6 Bev. Cross sections are reported for the (p,px+), (p,pn), and (p,p') reactions, as well as those for the formation of Be-7 and several neutron deficient isotopes of cadmium and indium. It was found that the (p,pn) yield increases slowly in the energy range 2 to 6 Bev, while the (p,px+) and (p,p') yields are approximately constant. The variation of the (p,pn) and (p,px+) yields with target thickness is discussed. The yields of several isomeric levels are correlated with their nuclear spin."
Date: January 1957
Creator: Nethaway, David Robert
System: The UNT Digital Library
Off-Gas Treatment in Berkeley Enclosures (open access)

Off-Gas Treatment in Berkeley Enclosures

"In the past ten years quantities of alpha-, beta-, gamma- and neutron-emitting isotopes handled in enclosures have increased from microcuries to kilocuries. Contaminated-atmosphere problems have increased accordingly. Developments at Berkeley are reviewed with particular emphasis on recent equipment, viz: a multiple-purpose gas scrubber and a total-capture system for slug-dissolver off gas."
Date: January 7, 1957
Creator: Thaxter, M. D.; Cantelow, H. P. & Burk, C.
System: The UNT Digital Library
The Electrical Design of a Heavy-Ion Accelerator (open access)

The Electrical Design of a Heavy-Ion Accelerator

The following report provides the design and workings of a heavy-ion accelerator designed to accelerate particles of atomic weight 12 through 20.
Date: August 20, 1957
Creator: Voelker, Ferdinand
System: The UNT Digital Library
Factors Influening Ammonia Decomposition in the Kjeldahl Method with Sealed Tube Digestion (open access)

Factors Influening Ammonia Decomposition in the Kjeldahl Method with Sealed Tube Digestion

This report follows the work on the Kjedahl digestion procedure in sealed tubes at 470 C. as well as analyzing factors influencing ammonia decomposition within these tubes.
Date: June 1954
Creator: Green, LeRoy G.; Koch, Charles William; Grunbaum, Benjamin W. & Kirk, Paul Leland, {}
System: The UNT Digital Library
Neutron Production by High-Energy Particles (open access)

Neutron Production by High-Energy Particles

Abstract: "From neutron-yield measurements made with a MnSO4 detecting solution, the average number of neutrons produced per inelastic event is determined for a series of elements from lithium to uranium for 340-Mev protons, 190-and 315-Mev deuterons, 490-Mev He3 ions, and 90- and 160-Mev neutrons. The results are analyzed in an attempt to understand the total yield measurements for thick targets and to explain the variation of yield with the atomic number of the target."
Date: September 29, 1954
Creator: Crandall, Walter E. & Millburn, George P.
System: The UNT Digital Library
Use of Controlled Photosynthesis for Maintenance of Gaseous Environment (open access)

Use of Controlled Photosynthesis for Maintenance of Gaseous Environment

Abstract: "The problem of maintaining livable oxygen and carbon dioxide pressures in a closed space in which men must live leads to consideration of the possible use of the photosynthesis of green algae. A calculation based on the known respiratory rate of man and the photosynthetic rates of Chlorella indicates that it would be feasible to use algae for this purpose."
Date: September 1954
Creator: Bassham, James Alan
System: The UNT Digital Library
Effects of Ionizing Radiation on Choline Chloride and Its Analogs (open access)

Effects of Ionizing Radiation on Choline Chloride and Its Analogs

Abstract: "Choline chloride and six analogs have been exposed in the dry, crystalline state to high-energy electron and gamma radiation. This investigation has confirmation the abnormal radiation sensitivity of choline chloride. Its G values (molecules decomposed/100 ev) were found to be: e- -radiation, 20; y-radiation, 175. These high values indicate a chain mechanism for the solid-state reaction. The G values for the choline analogs were found to range from 1 to 18 for the electron irradiations and from 1 to 32 for the gamma irradiations. Betaine hydrochloride approaches choline chloride in instability toward high-energy electrons but is far more stable in the presence of y-rays."
Date: December 1954
Creator: Lemmon, Richard M.; Parsons, Margaret A. & Chin, Doris M.
System: The UNT Digital Library
Focusing in Linear Ion Accelerators (open access)

Focusing in Linear Ion Accelerators

Abstract: "The results of the investigation of three methods of obtaining transverse stability in linear accelerators for ions are presented and discussed. For electric or magnetic quadrupole focusing the range of stable operation, oscillation amplitudes, and the operation of an actual grid is analyzed from measurements of the field distribution. Finally, the formulas applicable to focusing by axial magnetic lenses are presented."
Date: November 24, 1954
Creator: Smith, Lloyd & Gluckstern, Robert L.
System: The UNT Digital Library
High Pressure Low Resistance Joint (open access)

High Pressure Low Resistance Joint

The following report describes the usage of tin-foil to obtain a mechanical joint of low electrical resistance while providing a seal to hold water at a pressure of 300 psi.
Date: March 28, 1955
Creator: Peters, Ralph
System: The UNT Digital Library
A Numerical Method for Two-Dimensional Lagrangian Hydrodynamics (open access)

A Numerical Method for Two-Dimensional Lagrangian Hydrodynamics

Abstract: "A completely Lagrangian scheme for differencing hydrodynamical equations in two dimensions is described. The method conserves mass exactly. The advantages of Lagrangian over Eulerian schemes are briefly mentioned. An appendix gives the generalization to three dimensions."
Date: December 10, 1953
Creator: DeWitt, Bryce S.
System: The UNT Digital Library
High Energy Fission and Spallation of Uranium (open access)

High Energy Fission and Spallation of Uranium

From introduction: "This report is an attempt to examine, semiquantitavely, the way the competition between neutron emission and fission varies for heavy nuclei as a function of nuclear type and excitation energy. Many of the ideas herein are the results of discussions with R. H. Goeckermann and W. Heckrotte of the University of California Radiation Laboratory."
Date: February 25, 1954
Creator: Batzel, Roger Elwood
System: The UNT Digital Library
Acceleration of a Plasma by Time-Varying Magnetic Fields (open access)

Acceleration of a Plasma by Time-Varying Magnetic Fields

Abstract: An application of the magnetic mirror principle to the acceleration of a plasma is described. It is shown that an axially symmetric magnetic field which increases with time but decreases with distance along the axis can impart a net translational energy to a plasma. This effect on a plasma is contrasted with that arising from an impressed electric field, which is not effective in producing acceleration.
Date: December 6, 1954
Creator: Post, Richard F.
System: The UNT Digital Library
Measurement of the Behavior of a Plasma in a Magnetic Field by Means of Probes (open access)

Measurement of the Behavior of a Plasma in a Magnetic Field by Means of Probes

Abstract: "Probes were used to measure certain properties of the cloud of positive ions and electrons ejected from a pulsed ion source having two hydrogen-loaded electrodes. Time-of-flight measurements show: the presence of H+ ions with 50 ev directed energy; an increase of this energy with increasing pulse current in the source; a higher peak yield of ions with higher peak currents in the source; and higher yields and higher ion energies up to 110 ev have been recorded with the use of a pulsed magnetic field impressed upon the source. The neutral positive ion-electron beam from the source has been projected against an increasing magnetic field and the reflected and transmitted signals have been recorded and compared as a function of the magnetic field. Probe signals from the plasma as it encounters the magnetic field are oscillatory, suggesting that magnetohydrodynamic phenomena are presented."
Date: December 1, 1954
Creator: Bostick, W. H.; Zizzo, S. G. & Cook, Buford
System: The UNT Digital Library
Use of Thermal Electromotive Forces to Product Magnetic Field in a Controlled Thermonuclear Reactor (open access)

Use of Thermal Electromotive Forces to Product Magnetic Field in a Controlled Thermonuclear Reactor

The following report investigates the possible use of thermal emf's to produce the plasma-containing magnetic field in a thermonuclear reactor.
Date: December 27, 1954
Creator: Northrop, Theodore G.
System: The UNT Digital Library
An "Exact" Analysis of a Cylindrical Plasma in a Magnetic Field (open access)

An "Exact" Analysis of a Cylindrical Plasma in a Magnetic Field

Abstract: "The analysis of an immobilized plasma is here extended to the case where the geometry is cylindrical rather than Cartesian. (This report, UCRL-4439 (Rev, 4 constitutes Part II of the report series (UCRL-4466, Parts I, III, and IV) dealing with this general problem.)"
Date: January 14, 1955
Creator: Tonks, Lewi, 1897-1971
System: The UNT Digital Library
The Elimination of Microwave Reflections (open access)

The Elimination of Microwave Reflections

Abstract: "The reflections of microwaves from the walls of a plasma-containing vessel are studied. The probable cause of the reflections is discussed, and several suggestions are made for eliminating the reflections from the waveguide in the vessel and particularly from the pyrex vessel wall and copper tubing surrounding the pyrex. Quarter-wave-thick carbon-filled plastics or glasses having a very low vapor pressure room most promising when placed inside the pyrex cylinder. BaTiO3 appears to be an excellent material when placed outside the vacuum."
Date: February 1, 1955
Creator: Beard, David
System: The UNT Digital Library
Effect of a Decelerating Grid on Current from an Ion Source (open access)

Effect of a Decelerating Grid on Current from an Ion Source

Abstract: "A theoretical criterion is given for the conditions under which the ions from an ion source may be decelerated by a decelerating grid, following the accelerating grid which extracts ions from the emitter, without causing a reduction in the current supplied by the source."
Date: February 23, 1955
Creator: Bing, George F., 1924-; Gardner, C. S. & Northrop, Theodore G.
System: The UNT Digital Library
Linear Accelerator for Heavy Ions (open access)

Linear Accelerator for Heavy Ions

The following report discusses the construction of two heavy-ion linear accelerators, one at the the University of California Radiation Laboratory and the other at Yale University. The goal for these accelerators is to produce ions of masses up to that of neon with energies of 10 Mev per nucleon.
Date: March 27, 1959
Creator: Wells, Don
System: The UNT Digital Library
The Bevatron and its Place in Nuclear Physics (open access)

The Bevatron and its Place in Nuclear Physics

From page 2: "This article first describes the Bevatron [particle accelerator] and its operation, and then discusses a portion of the research program. The principles of the machine and its early history were given in "The Bevatron," by Lloyd Smith, Scientific American, February 1951."
Date: April 6, 1956
Creator: Lofgren, E. J.
System: The UNT Digital Library
Absolute Cross Sections for Secondary Particles Produced in High-Energy Nuclear Bombardments (open access)

Absolute Cross Sections for Secondary Particles Produced in High-Energy Nuclear Bombardments

From abstract: Absolute cross sections for the production of charged secondary particles is the bombardments of aluminum, nickel, silver, and gold by 332-Mev protons, 187-deuterons, and 380-Mev alpha particles have been determined.
Date: April 20, 1956
Creator: Bailey, L. Evan
System: The UNT Digital Library
Experiments on Polarization in Scatterig Deuterons from Complex Nuclei and in Proton-Proton Scattering (Thesis) (open access)

Experiments on Polarization in Scatterig Deuterons from Complex Nuclei and in Proton-Proton Scattering (Thesis)

Abstract: "The elastic double scattering of deuterons by complex nuclei has been investigated experimentally. Measurements were made on carbon, aluminum, and copper at around 157 Mev; on lithium, beryllium, and carbon at around 125 Mev; and on carbon and aluminum at 94 Mev. The expected tensor components of the deuteron polarization have not been observed. Measurements have been made of the differential cross section and vector-type polarization as a function of angle for the scattering of deuterons from the above elements, at the above energies. The observed polarizations were larger than would be expected on the basis of the individual nucleon-nucleus interactions. In a second experiment we measured the 169-Mev proton-proton polarization at 10, 15, 22.5, 30, and 35 in the laboratory system. The results indicate that partial waves up to and including L = 3 are important at this energy."
Date: May 11, 1956
Creator: Baldwin, John A., Jr.
System: The UNT Digital Library
Occluded-Gas Ion Source (open access)

Occluded-Gas Ion Source

"Characteristics of a pulsed, occluded-gas ion source, operating in a magnetic field, have been investigated. Mass spectra of hydrogen- and deuterium-loaded sources are presented. Constructional details of the source and its operating characteristics are discussed."
Date: June 27, 1956
Creator: Ehlers, Kenneth W.
System: The UNT Digital Library
Linear Pinch Work in Berkeley (open access)

Linear Pinch Work in Berkeley

The following report discusses the data of the Z-field pick-up loop, an effective diagnostic tool introduced to help experiments with the linear pinch.
Date: July 1956
Creator: Anderson, O. A. & Baker, W. R.
System: The UNT Digital Library
K-Meson Degeneracies (open access)

K-Meson Degeneracies

Abstract: "Some discussion is given of the possible real and charge parity degeneracies of K mesons. An explicit model is used to illustrate the superselection rule, which forbids the K meson to be a mixture of intrinsic parity states and at the same time conserve parity in decay. The discussion is extended to charge parity; the 01, 02 scheme appears to be more than an exercise in polarization phenomenons and to involve a radically new basic assumption--namely, that the 0-0 and 0-(-0) are degenerate states. The [tau]-0 is compared with the 02 as a long-lived K meson, and a method of experimental distinction is described."
Date: October 1956
Creator: Peaslee, D. C.
System: The UNT Digital Library