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Tellurium interference in /sup 129/I activation analysis
Measurement of /sup 129/I at low levels is required for effluent control, environmental assessment and tracer studies in the natural environment. Low level /sup 129/I analysis has also been used for measurement of natural-fission-produced /sup 129/I in minerals and ores as well as meteorites. The most sensitive method for /sup 129/I measurements is neutron activation analysis of iodine separated from a suitable sample. Minimum sample processing prior to neutron activation is desirable in order to reduce chances of sample contamination with uranium or /sup 129/I. A potential interference in the activation analysis method is the production of /sup 129/I (/sup 130/I) from Te impurities in the irradiated ampoule. Procedures have been developed and applied to measurement of the magnitude of the potential Te interference. One-tenth of a microgram of Te in the irradiated ampoule is sufficient to produce interference in the analysis. This is detectable by either radiochemical Te measurements or by /sup 131/I detection in the iodine fraction from the irradiated ampoule. This paper discusses the procedures and results of Te interference studies in /sup 129/I activation analysis. The interference was found to be insignificant for most analyses. 5 tables.
Date:
September 20, 1979
Creator:
Kaye, J. H.; Brauer, F. P. & Strebin, Jr., R. S.
Object Type:
Article
System:
The UNT Digital Library
Energy Exchange Within Ecosystems Annual Report: 1976
None
Date:
September 20, 1975
Creator:
Gates, David M.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0408.0118]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Casting the critic's eye at the entries in the state fair baking contest is bread judge Dr. M. J. McCarthy."
Date:
September 20, 1976
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0408.0169]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Fairgoer Robert C. Smith of Cleo Springs signs his name to the Declaration of Independence."
Date:
September 20, 1975
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0311.0111]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Setting examples for office workers and shopers, Downtown Now officials deposit goods in one of three canned foods receptacles set up for collections Tuesday, Wednesday and Thursday at Main and Harvey, Main at Brown's store and Park and Robinson."
Date:
September 20, 1971
Creator:
Heaton, Dave
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0051.1147]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "MERRY GO ROUND RIDE was not so merry for George Cantrell and Jack Cantrell as the car they were towing caused both cars to turn completely around."
Date:
September 20, 1973
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Coaches' Film: North Texas State University vs. San Diego State, 1975]
Partial footage of the 1975 football game between North Texas State University and San Diego State in San Diego, California, shot for coaching purposes. The game was held on September 20th, 1975 and the final score was 12-30, San Diego.
Date:
September 20, 1975
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[Photograph 2012.201.B0148.0426]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The Oklahoma Bureau of Investigation's new office building will be ready for occupancy by Nov. 1, the head of the state crime bureau said Wednesday."
Date:
September 20, 1972
Creator:
Carter, Pat J.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0155.0135]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "President-elect of Oklahoma Education Association becomes president in July, 1980."
Date:
September 20, 1979
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0152.0676]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sorely missed, at least for a while, was the talented toe of Abby Daigle."
Date:
September 20, 1975
Creator:
Traverse, Cliff
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[News Clip: Addison arrest]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Photodeath]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Photodeath]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Photo murder]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Black Reaction]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: SO Cutbacks]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: UAW]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 20, 1979, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Formation processes and secondary emission coefficients for H/sup -/ production on alkali-coated surfaces
The formation of negative ions by hydrogen collisions on cesium-coated surfaces is discussed in the limiting cases where the resident cesium is either in the purely ionic state or in the purely atomic state. The survival fraction for negative ions moving away from a metal surface is calculated using a method employing complex eigenvalues. The fraction of surviving ions is found to be larger than calculated by previous workers. The secondary emission coefficient for negative ion production by incident atoms with energies of ten to one hundred electron volts is estimated to be in the range thirty to fifty percent. The secondary emission coefficient is found to be a sensitive function of the thickness of the alkali adsorbate coating for ion energies in the range below a few hundred electron volts.
Date:
September 20, 1977
Creator:
Hiskes, J.R. & Karo, A.
Object Type:
Article
System:
The UNT Digital Library
Low aspect ratio double shells for high density and high gain
Double shell targets for use with 0.2-1.0 ..mu.. lasers are discussed. With 0.2 ..mu.. light, such designs achieve 500-1000 times liquid density at 2 KJ, 10% or more of breakeven at 15 KJ, gains of 10 or more at 200 KJ and a gain of 1000 for lasers of 1 to 10 megajoules.
Date:
September 20, 1977
Creator:
Lindl, J.D.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0322.0146]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dr. Robert B. Kamm, Pres. of OSU"
Date:
September 20, 1978
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0314B.0269]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "John A. Brown, Crossroads store manager, jack Lisle, congratulates Excell Jones following the declaration of "Excell Jones Day" at a party honoring Jones' 50th anniversary with the store."
Date:
September 20, 1979
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0130]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Wyatt F. Jeltz, Sr. Citizen Center"
Date:
September 20, 1979
Creator:
Tullous, Don
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0339.0415]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Denny Kennedy II is two years old Monday, but the son of Oklahoma City fireman Denny Kennedy celebrated early Sunday at the State of Oklahoma."
Date:
September 20, 1975
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0253.0446]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Denise Nicholas, Lloyd Haynes and Karen Valentine (left to right)"
Date:
September 20, 1972
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History