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Radionuclides in plankton from the South Pacific Basin
We have initiated an investigation of the utility of marine plankton as bioconcentrating samplers of low-level marine radioactivity in the southern hemisphere. A literature review has shown that both freshwater and marine plankton have trace element and radionuclide concentration factors (relative to water) of up to 10/sup 4/. We participated in Operations Deepfreeze 1981 and 1982, collecting a total of 48 plankton samples from the USCGC Glacier on its Antarctic cruises. Battelle Pacific Northwest Laboratories sampled air, water, rain, and fallout. We were able to measure concentrations in plankton of the naturally-occurring radionuclides /sup 7/Be, /sup 40/K, and the U and Th series, and we believe that we have detected low levels of /sup 144/Ce and /sup 95/Nb in seven samples ranging as far south as 68/sup 0/. Biological identification of the plankton suggests a possible correlation between radionuclide concentration and the protozoa content of the samples. 7 references, 5 figures.
Date:
March 23, 1984
Creator:
Marsh, K.V. & Buddemeier, R.W.
Object Type:
Report
System:
The UNT Digital Library
[Dave Lewis and Bill Nelson at Pride III]
Photograph of Dave Lewis (left), and Bill Nelson (right) standing in front of a large group of people at Pride III in Lee Park, Dallas, Texas. Both of them are holding striped rainbow flags on metal poles; several people in the background also have flags. Handwritten on the back of this photo are the words, "R. Dise, #84-23. Shot #6. Pride III Dallas at Lee Park. Foreground, l-r: Dave Lewis Bill Nelson. 09-23-84."
Date:
September 23, 1984
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Phil Johnson Press Release - April 23, 1984]
Press release announcing items that will be on display at the Community Center Gay Research Library. It specifically mentions the Lambda symbol acquired from the Gay Activists Alliance in New York.
Date:
April 23, 1984
Creator:
Johnson, Phil
Object Type:
Text
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 76, No. 8, Ed. 1 Thursday, February 23, 1984
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
February 23, 1984
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 76, No. 34, Ed. 1 Thursday, August 23, 1984
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
August 23, 1984
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Fort Worth Council]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 23, 1984, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Protest]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 23, 1984, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Nature walk]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 23, 1984, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Gambling machines]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 23, 1984, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Merchants]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
November 23, 1984, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Electronic exports]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 23, 1984, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Trends- Christmas Shopping]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
November 23, 1984, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Extension of the EQ3/6 computer codes to geochemical modeling of brines
Recent modifications to the EQ3/6 geochemical modeling software package provide for the use of Pitzer's equations to calculate the activity coefficients of aqueous species and the activity of water. These changes extend the range of solute concentrations over which the codes can be used to dependably calculate equilibria in geochemical systems, and permit the inclusion of ion pairs, complexes, and undissociated acids and bases as explicit component species in the Pitzer model. Comparisons of calculations made by the EQ3NR and EQ6 compuer codes with experimental data confirm that the modifications not only allow the codes to accurately evaluate activity coefficients in concentrated solutions, but also permit prediction of solubility limits of evaporite minerals in brines at 25/sup 0/C and elevated temperatures. Calculations for a few salts can be made at temperatures up to approx. 300/sup 0/C, but the temperature range for most electrolytes is constrained by the availability of requisite data to values less than or equal to 100/sup 0/C. The implementation of Pitzer's equations in EQ3/6 allows application of these codes to problems involving calculation of geochemical equilibria in brines; such as evaluation of the chemical environment which might be anticipated for nuclear waste canisters located in a salt …
Date:
October 23, 1984
Creator:
Jackson, K.J. & Wolery, T.J.
Object Type:
Article
System:
The UNT Digital Library
[List of WASP Paraphernalia Merchandise]
List of available WASP paraphernalia pieces for sale by the WASP WII Stores, with Helen B. Sheffer listed as the main contact.
Date:
March 23, 1984
Creator:
Sheffer, Helen B.
Object Type:
Text
System:
The Portal to Texas History
Low energy neutral source for fueling the central cell core plasma of TMX-U
The performance of a low energy neutral source formed by negatively biased plates inserted in the edge plasma of the central cell of the Tandem Mirror Experiment-Upgrade (TMX-U) is described. This technique promises to be capable of fueling the high density thermal barrier plasmas. We have found that annular ring electrodes mounted on the sides of the central cell gas box and inclined 45/sup 0/ to the plasma axis can produce about 80 A of inward-directed D/sup 0/ with an average energy E/sub 0/ approx. = 250 eV (where the plate bias = -400 V). This example was calculated for a peak plasma density n/sub e/(0) = 10/sup 13/ cm/sup -3/ and an edge plasma density n/sub L/ = 10/sup 12/ cm/sup -3/ at the limiter edge defined by the biased plates. The energetic neutrals, attenuated by about an e-fold in reaching the plasma center, are thus much more efficient in fueling the core plasma than Frank-Condon atoms, which are attenuated by greater than a factor of 100. In addition, because their energy is greater than Frank-Condon atoms their initial collisional trapping rate in the thermal barrier is reduced by a factor of approximately (100)/sup 3/2/ = 1000.
Date:
April 23, 1984
Creator:
Turner, W.C.
Object Type:
Report
System:
The UNT Digital Library
Coating of the SLAC klystron windows
Secondary emission is not likely to be suppressed in thin films. Accumulated charges leak away with two time constants. The fast time constant should be short compared to the pulse duration, and the slow time constant should be short compared to the time between pulses. The Joule heating may be prohibitive in reaching adequate charge removal. The joule heating may be reduced by films which conduct little in the direction of the electric field and much better in the perpendicular direction.
Date:
May 23, 1984
Creator:
Krienen, F.
Object Type:
Report
System:
The UNT Digital Library
Analyzing power measurements in high-P/sub perpendicular to//sup 2/ p-p elastic scattering
The analyzing power in 28 GeV/c proton-proton elastic scattering was measured at P/sub perpendicular to//sup 2/ = 5.95 and 6.56 (GEV/c)/sup 2/ y/sub g/ a polarized proton target and an unpolarized proton beam at the Brookhaven National Laboratory AGS. Results indicate that the analyzing power, A, is rising sharply with P/sub perpendicular to//sup 2/. Previous measurements of the analyzing power, A, in p + p ..-->.. p + p suggested a rise in A at large-P/sub perpendicular to//sup 2/, but the statistical uncertainty in the highest point at P/sub perpendicular to//sup 2/ = 5.95 (GeV/c)/sup 2/ made it impossible to determine the magnitude of the increase. In an effort to clarify this situation, we made new measurements of A at P/sub perpendicular to//sup 2/ = 5.95 and 6.56 (GeV/c)/sup 2/. An unpolarized beam of typically 5 x 10/sup 10/ 28 GeV/c protons from the AGS at Brookhaven National Laboratory was incident upon the University of Michigan polarized proton target. This target contains irradiated ammonia beads cooled to 0.5/sup 0/K by a /sup 3/He-/sup 4/He evaporation refrigerator, in a 2.5 T magnetic field. The polarizing transitions are driven by a 70 GHz microwave system. The polarization of the hydrogen protons is …
Date:
May 23, 1984
Creator:
Raymond, R. S.; Brown, K. A.; Bruni, R. J.; Cameron, P. R.; Crabb, D. G.; Cummings, R. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Comparison of the total neutral energy spectra of. cap alpha cap alpha. , dd and pp interactions at the ISR
The total neutral energy spectra, E/sub TOT//sup 0/ = ..sigma../sub i/ epsilon/sub i//sup 0/, have been measured in the central region of ..cap alpha cap alpha.., dd and pp interactions at ..sqrt..s/sub NN/ = 31 GeV with an electromagnetic calorimeter covering 2..pi.. in azimuth. The data were collected in the light-ion run at the CERN ISR during August 1983. The cross section ratio of the ..cap alpha cap alpha.. to the pp interactions increases rapidly with E/TOT//sup 0/ from 7 to 10/sup 5/ in the range 1.5 < E/sub TOT//sup 0/ < 19 GeV. The data are compared with a simple model of simultaneous multiple nucleon-nucleon collisions.
Date:
May 23, 1984
Creator:
Tanaka, M.
Object Type:
Report
System:
The UNT Digital Library
lambda. N effective interaction
A combination of theoretical estimates, based on a ..lambda..N potential model, and phenomenological analysis of hypernuclear data is used to determine a set of four P/sub N/s/sub ..lambda../ two-body matrix elements which characterize the spin dependence of the ..lambda..N interaction in the p shell. The central spin-spin and the ..lambda.. spin-orbit matrix elements are most strongly constrained by existing data. The spin dependence is weak in the sense that s/sub ..lambda../ doublet splittings are predicted to be of order 100 keV except for the special case of /sub ..lambda..//sup 7/Li where the central spin-spin interaction dominates and the ground-state doublet separation is likely to be about 600 keV. The results of recent (K/sup -/, ..pi../sup -/..gamma..) experiments at the Brookhaven AGS are interpreted in terms of the ..lambda..N effective interaction.
Date:
May 23, 1984
Creator:
Millener, D. J.
Object Type:
Article
System:
The UNT Digital Library
Aperture studies with Patricia and Racetrack on simple lattices containing SSC dipoles
The PATRICIA and RACETRACK particle tracking programs have been compared by tracking on a simple lattice. The dynamic aperture was found to decrease as the number of passes through the lattice per run increased from 20 to approx. 300, and it remained constant for longer runs. The dynamic apertures found by the two programs are consistent. The dependence of the dynamic aperture on horizontal tune near a decapole resonance was investigated. RACETRACK and PATRICIA showed decreases in the aperture on opposite sides of the resonance. A second set of studies was made with PATRICIA in which the dynamic apertures of lattices consisting of cells of the types used for the Reference Designs Study were determined when random multipole errors of the dipoles were included. The dependence of aperture on the number of cells in the lattice was determined. Finally, a comparison of magnet types suggested for the SSC was made by determining the aperture of lattices containing these magnets.
Date:
June 23, 1984
Creator:
Dell, G.F.; Leemann, B. & Willeke, F.
Object Type:
Article
System:
The UNT Digital Library
Study in optical systems for laser isotope separation. Final report
An overview is given of the following tasks related to laser isotope separation: Triton beam delivery optics, dye chain relay optics, CVL beam delivery, and optical delay line.
Date:
April 23, 1984
Creator:
Hayford, M.J.; Broome, B.G. & Manhart, P.K.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Red Bird fire]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 23, 1984, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Horse show]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 23, 1984, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Fix it shop]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 23, 1984, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library