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Pion correlations as a function of atomic mass in heavy ion collisions (open access)

Pion correlations as a function of atomic mass in heavy ion collisions

The method of two pion interferometry was used to obtain source-size and lifetime parameters for the pions produced in heavy ion collisions. The systems used were 1.70 {center dot} A GeV {sup 56}Fe + Fe, 1.82 {center dot} A GeV {sup 40}Ar + KCl and 1.54 {center dot} A GeV {sup 93}Nb + Nb, allowing for a search for dependences on the atomic number. Two acceptances (centered, in the lab., at {approximately} 0{degrees} and 45{degrees}) were used for each system, allowing a search for dependences on the viewing angle. The correlation functions were calculated by comparing the data samples to background (or reference) samples made using the method of event mixing, where pions from different events are combined to produce a data sample in which the Bose-Einstein correlation effect is absent. The effect of the correlation function on the background samples is calculated, and a method for weighting the events to remove the residual correlation effect is presented. The effect of the spectrometer design on the measured correlation functions is discussed, as are methods for correcting for these effects during the data analysis. 58 refs., 39 figs., 18 tabs.
Date: November 26, 1989
Creator: Chacon, A.D.
Object Type: Report
System: The UNT Digital Library
A microwiggler Free-Electron Laser at the Brookhaven Accelerator Test Facility (open access)

A microwiggler Free-Electron Laser at the Brookhaven Accelerator Test Facility

We report the design and status of an FEL experiment at the Brookhaven National Laboratory Accelerator Test Facility. A 50 MeV high brightness electron beam will be utilized for an oscillator experiment in the visible wavelength region. The microwiggler to be used is a superferric planar undulator with a 0.88 cm period, 60 cm length and K = 0.35. The optical cavity is a 368 cm long stable resonator with broadband dielectric coated mirrors. 8 refs., 2 figs., 4 tabs.
Date: September 26, 1989
Creator: Batchelor, K.; Ben-Zvi, Ilan; Fernow, R.; Gallardo, J.; Kirk, H.; Pellegrini, C. et al.
Object Type: Report
System: The UNT Digital Library
A C programmer's view of a relational database (open access)

A C programmer's view of a relational database

The AGS Distributed Control System (AGSDCS) uses a relational database (Interbase) for the storage of all data on the host system network. This includes the static data which describes the components of the accelerator complex, as well as data for application program setup and data records that are used in analysis. By creating a mapping of each elation in the database to a C record and providing general tools for relation (record) across, all the data in the database is available in a natural fashion (in structures) to all the C programs on any of the nodes of the control system. In this paper the correspondence between the Interbase elations and the C structure is detailed with examples of C typedefs and relation definitions. It is also shown how the relations can be put into memory and linked (related) together when fast access is needed by programs. 1 ref., 2 tabs.
Date: October 26, 1989
Creator: Clifford, T.; Katz, R. & Griffiths, C.
Object Type: Article
System: The UNT Digital Library

[Photograph 2012.201.B0112.0460]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Claudette Brownies displays a brick that will become part of the Kingfisher Centennial Brick Wall."
Date: January 26, 1989
Creator: Argo, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History
[Portion of Newspaper Article] (open access)

[Portion of Newspaper Article]

Portion of an article discussing the difficulties students at the Texas Academy of Mathematics and Science have in leaving their families at such a young age.
Date: April 26, 1989
Creator: Jamos, Cathy
Object Type: Clipping
System: The UNT Digital Library
TAMS closes first year with success (open access)

TAMS closes first year with success

Article discussing the successes of the first class of Texas Academy of Mathematics and Science students, and th difficulties they had in adjusting to living away from home.
Date: April 26, 1989
Creator: Jamos, Cathy
Object Type: Clipping
System: The UNT Digital Library

[Photograph 2012.201.B0098.0536]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gayle Boren, left, and Gloria Hulva visit with host Chris Sturm."
Date: January 26, 1989
Creator: Gooch, Steve
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0136.0536]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "John Williams, left, president of the local American Federation of Musicians chapter, and William B. Cleary, president of the Oklahoma City Philharmonic;s board of directors, sign a three-year contract Tuesday."
Date: September 26, 1989
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0171.0702]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The race is ion for Easter eggs in the Remington Park infield Sunday , and both joy and terror can be seen on the faces of some of the younger participants above and right."
Date: March 26, 1989
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0172.0539]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Drew Andres of the Internal Revenue Service's Oklahoma City officers from nine state who traveled to Edmond for a target shooing tournament last weekend."
Date: June 26, 1989
Creator: Klock, Roger
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0171.0706]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The race is ion for Easter eggs in the Remington Park infield Sunday , and both joy and terror can be seen on the faces of some of the younger participants above and right."
Date: March 26, 1989
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0171.0705]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dominique deMasrcay, 2 1/2 sports her version of an Easter bonnet while awaiting the start of the Easter egg hunt at Remington Park racetrack in Oklahoma City Sunday."
Date: March 26, 1989
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0162.0355]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "James Robert "J. R." Dillard, 23, was arrested in Cleveland on Friday in the alleged sale of several grams of Cocaine and a small quantity of synthetic drug in January, said Mike Dixon, an agent with the Oklahoma Bureau of Narcotics and Dangerous Drugs."
Date: April 26, 1989
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0134.0057]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Christmas is a time for giving , and the day after Christmas is a time for giving back."
Date: December 26, 1989
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History
Biomodal spontaneous fission (open access)

Biomodal spontaneous fission

Investigations of mass and kinetic-energy distributions from spontaneous fission have been extended in recent years to an isotope of element 104 and, for half-lives, to an isotope of element 108. The results have been surprising in that spontaneous fission half-lives have turned out to be much longer than expected and mass and kinetic- energy distributions were found to abruptly shift away from those of the lighter actinides, showing two modes of fission. These new developments have caused a re-evaluation of our understanding of the fission process, bringing an even deeper appreciation of the role played by nuclear shell effects upon spontaneous fission properties. 16 refs., 10 figs.
Date: September 26, 1989
Creator: Hulet, E.K. (Lawrence Livermore National Lab., CA (USA))
Object Type: Article
System: The UNT Digital Library
The Brookhaven Accelerator Test Facility laser linac beam line (open access)

The Brookhaven Accelerator Test Facility laser linac beam line

We report here the low emittance beam transport line for laser acceleration experiments at the Brookhaven Accelerator Test Facility (ATF). In order to preserve the low emittance ({approximately} 10{sup -10} m-rad) 50 MeV electron beam, great care has to be paid to the higher-order effects. The low-emittance transport line consists of two parts; the first part performs and emittance selection, and the other part provides the possibility of energy selection and beam transport to the experimental area. 7 refs., 5 figs., 7 tabs.
Date: September 26, 1989
Creator: Wang, Xijie (Brookhaven National Lab., Upton, NY (USA) California Univ., Los Angeles, CA (USA). Center for Advanced Accelerators Physics) & Kirk, H.G. (Brookhaven National Lab., Upton, NY (USA))
Object Type: Report
System: The UNT Digital Library

[Photograph 2012.201.B0348.0191]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Patsy Kuhn, right, holds her adopted son, Jacob, 2, as the Mayan Indian boy takes the U.S. oath of allegiance during a naturalization ceremony Friday at the federal courthouse in Oklahoma City."
Date: January 26, 1989
Creator: Hellstern, Paul
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0252.0287]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "When Robert Hawk came to Oklahoma City to scout the market for his Spaghetti Warehouse Restaurants, he went right to the source."
Date: October 26, 1989
Creator: Hellstern, Paul
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0267.0731]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sequoyah Houston, standing , far right, is shown with three other lawmen and a prisoner."
Date: January 26, 1989
Creator: unknown
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0267.0726]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Leonard Houston discusses his late grandfather while going through several old photos."
Date: January 26, 1989
Creator: McDaniel, David
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0252.0286]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "What Bricktown needs is a good shot of something Bob Hawk candidly calls " the greed principle."
Date: October 26, 1989
Creator: Hellstern, Paul
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0261B.0639]

Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Marshall Holmes"
Date: March 26, 1989
Creator: Beckel, Jim
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0248.0050]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "During his 11-1/2 years as Oklahoma City airport director, Leroy Hansen has guided Will Rogers World Airport through a period of almost constant development."
Date: May 26, 1989
Creator: Hoke, Doug
Object Type: Photograph
System: The Gateway to Oklahoma History

[Photograph 2012.201.B0271.0541]

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "United Way compaign chairman Stan Hupfeld (in flight suit) watches with unit chairman Craig Arnold and event chairman Marta Starrett as Debi Neumann moves a United Way thermometer marker to show how much money has been raised."
Date: October 26, 1989
Creator: McDaniel, David
Object Type: Photograph
System: The Gateway to Oklahoma History