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Detection systems for the low-level radiochemical analysis of iodine-131, iodine-129, and natural iodine in environmental samples

Description: A procedure based on chemicsl separation techniques and activation anslysis was developed for the sequential analysis of low levels of /sup 131/I, / Sup 129/I, and natural iodine in environmental samples. The iodine is first separated from the samples by oxidation. The separated iodine is then counted by low-level, beta-gated gamma spectrometry for the measurement of /sup 131/I. The chemical yield for the separation is measured by means of /sup 125/I tracer. Activation analysis is used for meas… more
Date: October 26, 1973
Creator: Brauer, F.P. & Kaye, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Pyganodon grandis, Specimen #823

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.
Date: June 26, 1973
Creator: Britton, Joseph
Item Type: Refine your search to only Specimen
Partner: Elm Fork Natural Heritage Museum

Pyganodon grandis, Specimen #824

Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.
Date: June 26, 1973
Creator: Britton, Joseph
Item Type: Refine your search to only Specimen
Partner: Elm Fork Natural Heritage Museum
open access

Isotopic power materials development progress report for November 1971

Description: Data are given on bend testing of Pt--Rh--W alloys; tensile properties of Pt--Rh--W alloys with and without Hf and Ti additions; tensile properties of recrystallized Ir; effects of contamination by gases (oxygen, degassed impurities, water vapor, CO) on the tensile properties of T-111, TZM, and Mo--46% Re; and fractography and bend testing of T-111 from Pioneer heat source capsules. (DLC)
Date: November 26, 1973
Creator: Donnelly, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Return to brute force

Description: It now appears feasible to attempt to overcome instability losses by the brute force approach. Calculations show that the number of trapped ions can be increased by an order of magnitude and that trapping by ground-state ionization will become important under brute force conditions, because of recent improvements in beam, vacuum, and magnet technology. The key assumption is that the time constant for losses duc to instabilities is constant. (auth)
Date: September 26, 1973
Creator: Hamilton, G. W. & Osher, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mass spectrometer vacuum-lock carriages coated with Teflon-S

Description: Seizing of the metal-to-metal, piston-like carriages of a thermal ionization mass spectrometer vacuum lock was eliminated by replacing 0.0015 in. of the carriage surface with Teflon-S. The vacuum lock has been operated 1600 times in the 3.5 years since the carriages were coated. Both the plastic surface and the mass spectrometer vacuum remain satisfactory. (auth)
Date: November 26, 1973
Creator: Howard, O.H. & Langdon, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Threshold effects and oscillations in models with t-channel factorization

Description: From meeting of the division of particles and fields; Berkeley, California USA (13 Aug 1973). Threshold effects and oscillating cross sections are reviewed in the context of models (such as the multiperipheral) which employ factorization and indefinite repetition in the t-channel. The origin of logarithmic energy thresholds is illustrated by the ABFST model and applied to antibaryon production and rising cross sections at high energy. Then one discusses large-mass diffraction dissociation and i… more
Date: September 26, 1973
Creator: Koplik, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computer-controlled sampling system for airborne radionuclides

Description: From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). A computer-controlled air sampling system has been designed and is presently being constnacted. The self-contained, mobile system will collect and record data from eight meteorological sensors. This information will be used in the study of resuspen airborne activity. Air sampler operation will be based on comparisons between the meteorological data and the sampling criteria selected by the operator at the beginning of… more
Date: November 26, 1973
Creator: Koval, J. S.; Reichman, J. M. & Fry, C. O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

TRILIN: a computer analysis of the transient response of elastic structures

Description: The computer code TRILIN employs a force method that uses prismatic beam- type elements and discrete masses for the analysis of the transient response of linearly elastic, three-dimensional, frame-type structures subjected to arbitrary loading conditions. Each beam element is capable of resisting tension, bending, and torsion. A global stiffness matrix is obtained by inverting the flexibility relationships. Modal superposition is used to solve the governing equations. (auth)
Date: October 26, 1973
Creator: Miller, A. B.; Weston, A. M.; Hallquist, J. O. & Bernreuter, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lamb-wave inspection of welds in stainless steel tubes

Description: An ultrasonic Lamb-wave inspection technique was developed for use in inspecting the gas tungsten arc (GTA) welds in small diameter stainless steel tubes for lack of penetration. The particular technique was employed because of the ability to introduce the sound into the material a distance from the weld. A conventional shear-wave technique was tried without success. (auth)
Date: December 26, 1973
Creator: Schrick, G. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seismic effects on a proposed underground reactor facility

Description: A study was conducted to determine the seismic effects on the containment structure of a proposed underground reactor facility. Simplified and often inadequate building code equivalent static design procedures frequently used for conventional reactor systems are not adequate for partially buried or fully buried reactor systems. A sophisticated dynamic analysis which can consider soilstructure interaction effects resulting from both seismic displacements and forces must be employed. One such app… more
Date: February 26, 1973
Creator: Tokarz, F. J. & Murray, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Armed Forces recruitment flyer]

Description: Photograph of a flyer for joining the Armed Forces. It states, "Volunteer for America: See Your Armed Forces Recruiter Today." In the center is a picture of a bald eagle carrying the U.S. shield.
Date: July 26, 1973
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Armed Forces recruitment flyer]

Description: Photograph of a flyer for joining the Armed Forces. It states, "Volunteer for America: See Your Armed Forces Recruiter Today." In the center is a picture of a bald eagle carrying the U.S. shield.
Date: July 26, 1973
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
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