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Data Processing For Bubble Chambers (open access)

Data Processing For Bubble Chambers

The computer program which performs spatial reconstruction of events photographed in a bubble chamber is required to eliminate human and digitizer errors. It recognizes and corrects for single nuclear scatterings in the presence of multiple Coulomb scatterings. Momentum components are determined and kinematic constraints are applied. Measured parameters are performed into special reference frames and quantities of physical interest are calculated. Results are stored in a tape file containing all events of one reaction type.
Date: November 10, 1960
Creator: White, Howard S.
System: The UNT Digital Library
Genetic Influences On Mating Behavior In Drosophila Melanogaster (open access)

Genetic Influences On Mating Behavior In Drosophila Melanogaster

Certain aspects of mating behavior in two different types of Drosophila melanogaster females (Basc and Bv) and wildtype males (Samarkand) have been investigated and compared.
Date: December 6, 1960
Creator: Hildreth, Philip E. & Becker, Gweneth Carson
System: The UNT Digital Library
Possible Manifestations Of A Pion-Pion Interaction (open access)

Possible Manifestations Of A Pion-Pion Interaction

The pion-pion interaction is of great theoretical importance and must be understood before the other and more familiar interactions can be systematically analyzed. Therefore, various experiments to verify the existence of a P resonance in the w w system are proposed.
Date: January 6, 1960
Creator: Chew, Geoffrey F.
System: The UNT Digital Library
An Experimental Check On The Range-Energy Curve Of Pions In Propane (open access)

An Experimental Check On The Range-Energy Curve Of Pions In Propane

The kinetic energies of pions from radioactive decays in propane have been determined by using the information given by the angles of the secondary particles. This method is independent of any range-energy relation.
Date: October 24, 1960
Creator: Patrick, Jack W.
System: The UNT Digital Library
Photoproduction Of Neutral Pions As A Function Of Mass Number (open access)

Photoproduction Of Neutral Pions As A Function Of Mass Number

The relative yield of neutral photopions from various elements was determined as a function of the quantum limit energy of the Berkeley synchrotron. Single decay photons from neutral pions were observed at 45, 90, and 135 deg to the incident bremsstrahlung in the laboratory system. Mean free paths for neutral pions in nuclear matter were obtained, an optical model prediction of the photopion yields based upon pion-nucleus scattering data was confirmed, and the presence of coherent pion production in the forward direction was detected.
Date: November 4, 1960
Creator: Anderson, John D.; Goodwin, Lester K. & Kenney, Robert W.
System: The UNT Digital Library
Resistance Measurements To 400 Kilobars (open access)

Resistance Measurements To 400 Kilobars

A modification of the Bridgeman anvils is described. This modification permits studies to be made to a load of 400 kbars, about twice that previously available.
Date: November 8, 1960
Creator: Vaisnys, Juozas; Stromberg, Harold & Jura, George
System: The UNT Digital Library
The RCA 6949 As A Self-Excited Cyclotron Oscillator (open access)

The RCA 6949 As A Self-Excited Cyclotron Oscillator

The oscillator of the 88-in. cyclotron which is being built in Berkeley is tunable from 5.3 to 16.5 Mc. It delivers a maximum c-w power of 300 kw. At the rated doc voltage of 75 kv the resonator stores 4.5 joules of electrical energy. The transients produced by this amount of energy, during sparking, place unusual requirements upon the design of the oscillator tube. The features of the RCA 6949 which make it particularly well-suited to this type of application are discussed in this paper. Other topics covered are the oscillator anode power supply, the hard-tube modulator, protective equipment, and oscillator instrumentation.
Date: October 25, 1960
Creator: Smith, Bob H.
System: The UNT Digital Library
BEFCYF And DBDT: IBM 704 Codes For Preparing Input For Bevatron Orbit Code (BOC) (open access)

BEFCYF And DBDT: IBM 704 Codes For Preparing Input For Bevatron Orbit Code (BOC)

Two IBM-704 codes have been written which are auxiliary to the Bevatron orbit code BOC. The first, BEFCYF, interpolates among tabulated values of the median-plane magnetic flux density of the Bevatron to produce an equivalent array of values in a form appropriate to BOC. The second, DBDT, produces azimuthal derivatives of the fields produced by BEFCYF. The internal operation of BEFCYF and DBDT is described, and instructions for their execution are given.
Date: August 30, 1960
Creator: Gardner, C. Gerald
System: The UNT Digital Library
The Interactions Of Strange Particles (open access)

The Interactions Of Strange Particles

This report is a corrected copy of the authors "rapporteur talk" at the 1959 Kiev Conference on High Energy Physics. It contains data on the rapporteur system and on interactions of strange particles with protons and neutrons, using data from bubble chambers, counters, and emulsions.
Date: August 11, 1960
Creator: Alvarez, Luis W.
System: The UNT Digital Library
Current Status Of Curium Inhalation Exposures In Humans (open access)

Current Status Of Curium Inhalation Exposures In Humans

An incident is described concerning a curium accelerator target aerolized by explosion. Management of the spill, sampling, particle sizing, and medical findings are presented. Seven of the 27 persons present showed low levels of curium excretion. The data from this incident were compared with those from three other inhalation exposures to curium compounds at Lawrence Laboratory.
Date: September 1960
Creator: Parker, Howard G.; Thaxter, Myron D. & Biggs, Max W.
System: The UNT Digital Library
Use Of Pyroelectric Devices For Measuring Small Temperature Changes (open access)

Use Of Pyroelectric Devices For Measuring Small Temperature Changes

A technique for measuring extremely small temperature changes by means of a pyroelectric device is described. The sensing element is a short thin rod of polarized barium titanate ceramic with electrodes on the ends. The electric charges produced by changes in temperature are measured by a vibrating-reed electrometer. A number of calorimetric and noncalorimetric applications for the device are suggested.
Date: July 1960
Creator: Lang, Sidney B.
System: The UNT Digital Library
Experiments With Pulsed Magnetic Cusps (open access)

Experiments With Pulsed Magnetic Cusps

Experiments with a simple pulsed magnetic field in cusped geometry are described. The plasma is generated inside the containment region rather than injected from an external source. It was found that creation of the plasma by a linear pinch discharge is most successful. Only qualitative studies have been carried out so far, using time-resolved visual observation of the plasma. Well-defined plasma bodies located in the central region between the cells were photographed. In order to make them clearly visible, a few percent of argon was added to the hydrogen.
Date: May 26, 1960
Creator: Watteau, Jean-Paul H.
System: The UNT Digital Library
Automatic Scanning And Measuring Of Bubble Chamber Photographs (open access)

Automatic Scanning And Measuring Of Bubble Chamber Photographs

The development of high-energy charged particle accelerators such as the Bevatron and of improved nuclear-event detection devices such as the Berkeley 72-in. hydrogen bubble chamber has greatly increased the need for high-speed data reduction of nuclear events. Full exploitation of the potential of the 72-in. bubble chamber demands a very high-speed analysis system. This paper describes an approach to such a system.
Date: June 1, 1960
Creator: Grasselli, Antonio
System: The UNT Digital Library
Quantitative Aspects Of Mating Behavior In Drosophila (open access)

Quantitative Aspects Of Mating Behavior In Drosophila

Individual Samarkand wildtype D. melanogaster males were permitted to choose between either two white-eyed or two red-eyed females or between a red-eyed and a white-eyed female. Observations of the flies were made over a period of about two hours and premating periods, intermating periods and the durations of copulations were recorded.
Date: June 24, 1960
Creator: Hildreth, Philip E.
System: The UNT Digital Library
Particle Accelerators (open access)

Particle Accelerators

The principal types of particle accelerators are described briefly according to operation and history. Known operating particle accelerators are listed with their pertinent dimensions.
Date: August 1, 1960
Creator: Gordon, Hayden S. & Behman, Gerald A.
System: The UNT Digital Library
Electron-Electron Coincidence Spectrometer BRS-IV (open access)

Electron-Electron Coincidence Spectrometer BRS-IV

This report summarizes the original construction and recent modifications of the electron-electron coincidence spectrometer BRS-IV located in Building 70 of the Lawrence Radiation Laboratory. In addition to new information on the modified spectrometer, this report also contains a large amount of material taken from two previous UCRL reports.
Date: May 1960
Creator: Unik, John P.
System: The UNT Digital Library
The Complete Bound Spectrum Of The Negative Hydrogen Ion (open access)

The Complete Bound Spectrum Of The Negative Hydrogen Ion

Ever since the existence of a bound state of Hydrogen was discovered, it has been uncertain whether any other bound states existed. In addition to its importance in astrophysics this question has also come up in discussions of the scattering of electrons from hydrogen. To settle this problem it is necessary to calculate lower bounds for the eigenvalues of the Schrodinger equation. A simple calculation has been carried out for the problem of the negative hydrogen ion.
Date: September 1960
Creator: Schwartz, Charles
System: The UNT Digital Library
The Statistical Geometry Of Bubble Tracks (open access)

The Statistical Geometry Of Bubble Tracks

An exact treatment of the structure of tracks in nuclear research emulsion recently was attempted with some success. Many of the proofs also appear to be generally valid for bubble tracks in Wilson chambers. This is a summary of the results that are applicable to tracks of charged particles in bubble chambers.
Date: September 28, 1960
Creator: Barkas, Walter H. (Walter Henry), 1912-1969
System: The UNT Digital Library
A Preliminary Investigation Of The System Time Spread For Some Types Of Multiplier Phototubes (open access)

A Preliminary Investigation Of The System Time Spread For Some Types Of Multiplier Phototubes

A preliminary investigation of four types of multiplier phototubes under conditions simulating their use in scintillation and Cerenkov nuclear detectors is described. The investigation involves time-spread and rise-time measurements at different reference points on the outpost pulses, as well as observations of some special characteristics of these tubes.
Date: October 1960
Creator: El Hakim, Yahia
System: The UNT Digital Library
The Reduction Of Boolean Truth Functions To Minimal Form (open access)

The Reduction Of Boolean Truth Functions To Minimal Form

The problem of the reduction of an arbitrary truth function to the minimal union of basic cells is discussed. The solution to this problem has applications to pattern recognition and logical circuit design. An algorithm is presented that solves the problem and generates the class of minimal unions. It partitions an arbitrary truth function into a well-defined set of subfunctions (components) in such a way that the partition is invariant under all transformations that preserve the topology of the original truth function.
Date: May 20, 1960
Creator: Natapoff, Alan
System: The UNT Digital Library
Hindrance Factors For Alpha Decay (open access)

Hindrance Factors For Alpha Decay

The theoretical half lives for alpha emissions have been calculated for nearly all of the complex alpha spectra. The spin independent equations of Preston were used for the calculations. The nuclear radius for the even-even nuclei was determined with the assumption that the alpha transition to the ground state is unhindered. For odd mass nuclides the average of the nuclear radii of the adjacent even-even nuclides was used. For odd-odd nuclides the average of the nuclear radii of the adjacent odd mass nuclides of the same atomic number was used.
Date: May 1960
Creator: Michel, Helen V.
System: The UNT Digital Library
The Rb85-Rb86 Hyperfine-Structure Anomaly (open access)

The Rb85-Rb86 Hyperfine-Structure Anomaly

The atomic beam magnetic-resonance method with separated oscillatory fields has been used to measure the hyperfine structure separation and magnetic dipole moment of the isotopes Rb85 and 18.6d Rb86 in the 2S1/2 electronic ground state. Observation of the separation of a [formula] doublet in the intermediate field region gives the value of the moment; the minimum value of the mean doublet frequency gives the value of [formula]. Observation of another [formula] doublet in low field also yields a value for [formula].
Date: August 1960
Creator: Braslau, Norman; Brink, Gilbert O. & Khan, Jhan M.
System: The UNT Digital Library
Digital-Computer Analysis Of Data From Bubble Chambers. IV. The Kinematic Analysis Of Complete Events (open access)

Digital-Computer Analysis Of Data From Bubble Chambers. IV. The Kinematic Analysis Of Complete Events

A digital computer program called KICK (K-meson Interaction Coplanarization and Kinematics), which carries out the analysis of complete bubble chamber events, is described.
Date: February 16, 1960
Creator: Rosenfeld, Arthur H., 1926-2017 & Snyder, James N.
System: The UNT Digital Library
The Theory Of Emulsion Track Structure (open access)

The Theory Of Emulsion Track Structure

The statistical behavior of measured track quantities, gap density, gap length coefficient, and lacunarity is studied. The transformations which give the expectation values of track quantities on inclined tracks are then found.
Date: June 1960
Creator: Barkas, Walter H. (Walter Henry), 1912-1969
System: The UNT Digital Library