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Development of thin foils for use in generating neutral particle beams
The Isotope Research Materials Laboratory (IRML) was requested to prepare large-area, ultrathin aluminum and carbon foils for use in beam neutralization experiments. There were two major parts to this request. The first was to immediately provide a number of 5-cm-dia foils 5 to 20 ..mu..g/cm/sup 2/ thick for use in experiments at the Fusion Materials Irradiation Test (FMIT) facility and at Argonne National Laboratory (ANL). The second, longer-term request was to develop methods to prepare 25-cm x 25-cm, 10-..mu..g/cm/sup 2/ aluminum neutralizer foils. Both parts of the request have been successfully met.
Date:
January 1, 1986
Creator:
Aaron, W. S.; Zevenbergen, L. A.; Adair, H. L.; Culpepper, C. A.; McCulla, W. H.; Nolan, T. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Preparation of thin films for use in generating neutral particle beams
Large-area, thin aluminum foils were prepared for use in beam neutralization experiments. The foils were made using either electron beams of resistance heating. Foil thickness and uniformity were determined using alpha particles. The foils perform very well when bombarded by energetic H/sup -/ ions. (DLC)
Date:
January 1, 1986
Creator:
Aaron, W.S.; Zevenbergen, L.A. & Adair, H.L.
Object Type:
Article
System:
The UNT Digital Library
Limit on tau neutrino mass
Using the complete data sample of 300 pb/sup -1/ collected by the HRS spectrometer in e/sup +/e/sup -/ collisions at 29 GeV, mass limit for the tau neutrino is set. The end point of the hadronic mass spectrum is determined in the decays tau ..-->.. 5..pi../sup + -/nu/sub tau/ and tau ..-->.. 5..pi../sup + -/..pi../sup 0/nu/sub tau/. At 95% confidence level, an upper limit of M/sub nu/sub tau// < 76 MeV/c/sup 2/, is found. 8 refs., 4 figs.
Date:
January 1, 1986
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Beltrami, I.; Blockus, D.; Bonvicini, G. et al.
Object Type:
Article
System:
The UNT Digital Library
Charm D production in e/sup +/e/sup -/ annihilation at 29 GeV
Results are presented on the analysis of charm D Production from 300 pb/sup -1/ of data taken with the HRS Detector at PEP. The electroweak asymmetry is -8.4 +- 3.6% and R (D + D*) = 1.57 +- 0.17. Fragmentation functions for D/sup 0/, D/sup +/, D*/sup +/ production and the results of a search for the D** are given. 10 refs., 9 figs.
Date:
January 1, 1986
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Limit on tau decay to 7-charged tracks
Using the complete data sample of 300 pb/sup -1/ from e/sup +/e/sup -/ collisions at 29 GeV, the HRS collaboration has searched for tau decay to 7 charged particles and any number of neutrals. No events were found. The corresponding upper limit to the branching ratio is B(tau ..-->.. 7..pi../sup + -/ + n..gamma.. + nu/sub tau/) < 3.8 x 10/sup -4/ at 90% confidence level. Using the final HRS data sample we also report updated branching ratios for tau ..-->.. 5..pi../sup + -/ + nu/sub tau/ and tau ..-->.. 5..pi../sup + -/ + ..pi../sup 0/ + nu/sub tau/.
Date:
January 1, 1986
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the D/sup 0/ meson lifetime
We report the measurement of the lifetime of the D/sup 0/ meson. The direct observation of the decay vertex distribution in the process D/sup 0/ ..-->.. K/sup -/..pi../sup +/ was made using a vertex chamber installed in the HRS detector at PEP. The measured lifetime is found to be tau/sub D/sup 0// = .42 +- .09 +- .06ps. 5 refs., 4 figs.
Date:
January 1, 1986
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the tau lepton lifetime
We report the measurement of the lifetime of the tau lepton. This measurement was made using the HRS spectrometer at PEP, operating at 29 GeV. The 3 prong decay vertices were measured using a four layer tubular cell vertex chamber. The lifetime of the tau was determined to be tau/sub tau/ = .28 +- .02 +- .02 ps. 7 refs., 3 figs.
Date:
January 1, 1986
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J.M. et al.
Object Type:
Report
System:
The UNT Digital Library
Observation of tensor and scalar mesons produced in e/sup +/e/sup -/ annihilation at 29 GeV
The production of the tensor mesons, integral/sup 0/(1270) and K*/sup 0/(1430), and the scalar meson S(975) have been observed in e/sup +/e/sup -/ annihilation at 29 GeV center of mass energy, using data obtained with the HRS detector at the PEP storage ring. The mean multiplicities for meson momenta greater than 1450 MeV/c are <n/sub f/sup 0//> = 0.11 +- 0.04, <n/sub K*/sup 0/(1430)/> = 0.10 +- 0.06, and <n/sub S/> = 0.05 +- 0.02 per hadronic event. The fragmentation functions of the tensor mesons are in good agreement with the predictions of the Webber cluster model. The possibility of a large strange quark component in the S meson structure is suggested by the data.
Date:
January 1, 1986
Creator:
Abachi, S.; Baringer, P.; Bylsma, B. G.; DeBonte, R.; Koltick, D.; Loeffler, F. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Physical inventory verification exercise for a highly enriched uranium fabrication facility
The International Atomic Energy Agency, in collaboration with the US Support Program (POTAS), has developed and conducted a training exercise simulating a physical inventory verification (PIV) at a highly enriched uranium (HEU) fabrication facility. This exercise is part of a series sponsored by the POTAS program, including PIVs at light-water reactors and plutonium fabrication facilities. The first HEU exercise took place in September 1985 at Los Alamos National Laboratory and a second is scheduled for Spring, 1987 at JRC, ISPRA. The main objectives of these exercises are: to provide the opportunity for inspectors to test and evaluate the use of nondestructive assay (NDA) equipment and computer software under conditions similar to those found during actual inspections; to use the data generated to evaluate different inspection procedures and strategies; and to exchange ideas on PIV procedures between the three operations divisions. Because the exercises are conducted in a neutral environment, free of the time pressure often found in actual inspections, it is possible for the inspectors to achieve the course objectives.
Date:
January 1, 1986
Creator:
Abedin-Zadeh, R. & Augustson, R.H.
Object Type:
Article
System:
The UNT Digital Library
Technology development for the design of shallow land burial facilities at semiarid sites
The following topics are discussed: effectiveness of a moisture barrier, physical basis for capillary barriers, trench cap designs for long-term stabilization, biointrusion barrier testing, and joint DOE/NRC tracer migration experiment. (LM)
Date:
January 1, 1986
Creator:
Abeele, W. V.; Nyhan, J. W. & Drennon, B. J.
Object Type:
Article
System:
The UNT Digital Library
NMR investigations of aging effects in palladium tritide
Using pulsed NMR techniques, relaxation times for triton, proton, and /sup 3/He nuclei in recently synthesized PdH/sub x/ and PdT/sub x/ samples were measured as a function of temperature in the range 100 less than or equal to T less than or equal to 300/sup 0/K. Rigid lattice second moments (T approx. = 100/sup 0/K) were also determined. These results provide baseline information for an extended study of aging effects of PdT/sub x/. 6 refs., 7 figs., 2 tabs.
Date:
January 1, 1986
Creator:
Abell, G.C. & Attalla, A.
Object Type:
Article
System:
The UNT Digital Library
[Abilene City Council Minutes: 1986]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 9, 1986 to December 18, 1986. A blank index meant for names is included at the front.
Date:
1986-01-09/1986-12-18
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. Hydrocarbon cutoff hypothesis and developmental needs for a ruthenium catalyst with low light ends selectivity were investigated during this quarter. Hydrocarbon product distribution was Anderson-Schulz-Flory up to a carbon number of 250 and cutoff did not occur with a titania-supported catalyst containing ruthenium particles smaller than 20[Angstrom]. It was found that an alumina-supported catalyst with 1% (by weight) ruthenium in the form of 50[Angstrom] to 100[Angstrom] metal particles was initially about half as active (by catalyst volume) and made one quarter of the amount of C[sub 1][minus]C[sub 4] light end products relative to the Sasol precipitated iron catalyst.
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. During this quarter, the emphasis in the program has been the investigation of the hydrocarbon cutoff hypothesis with supported ruthenium catalysts. An alumina-supported catalyst with smaller than 20[Angstrom] ruthenium particles was tested under conditions of maximal water gas shift activity. During this test more than 90% of the water made in the Fischer-Tropsch synthesis reaction was converted to H[sub 2]. However, the extent of ruthenium metal agglomeration was not reduced. Accordingly, it was not possible to conclude whether hydrocarbon cutoff occurs with smaller than 20[Angstrom] ruthenium particles on [gamma]-alumina. A ruthenium catalyst prepared on Y-type zeolite had 20[Angstrom] or smaller ruthenium particles according to STEM examination and a 15[Angstrom] average ruthenium metal particle size according to EXAFS examination. The ruthenium metal particle size was stable during the test with this catalyst. The hydrocarbon product distribution was Anderson-Schulz-Flory with no cutoff up to a carbon number of 160. A well-dispersed titania-supported ruthenium catalyst is going to be evaluated during the next quarter in order to determine whether …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst selective to gasoline or diesel range fuel via application of a micelle technique for preparing specific site supported ruthenium particles. The current emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. During this quarter, micelle technique was further improved and 1 ruthenium particle:l reverse micelle limit was approached by careful control of catalyst synthesis conditions. Accordingly, it became possible to synthesize supported particles that closely meet the size and composition targets originally set. This improved technique was applied to synthesis of chemically modified ruthenium catalysts. Some of the chemically modified ruthenium catalysts will be evaluated later in the program. We previously reported that 40--60 [Angstrom] ruthenium particles prepared on [gamma]-alumina do not result in hydrocarbon cutoff. We could not determine then whether smaller ruthenium particles result in hydrocarbon cutoff because these particles agglomerated via ruthenium carbonyl formation during the course of a 6--10 day test. We have recently evaluated a catalyst with 20--40 [Angstrom] ruthenium particles prepared on [gamma]-alumina by carefully analyzing products initially made during the test prior to substantial ruthenium agglomeration. We concluded that cutoff is not effected by …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory
The objective of this program is to develop a synthesis gas conversion catalyst with improved selectivity to gasoline or diesel range fuel via application of a micelle technique for preparing novel supported catalysts with specific size ruthenium particles. The major emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. We previously reported that cutoff is not effected with 40--60 [Angstrom] and 20--40 [Angstrom] ruthenium particles on [gamma]-Al[sub 2]O[sub 3]. We recently tested a catalyst with <20 [Angstrom] ruthenium particles. Well dispersed ruthenium in that catalyst extensively agglomerated to larger particles even during the course of a short test despite the high H[sub 2]:CO ratio used. Therefore, we could not conclude whether cutoff is effected with <20 [Angstrom] ruthenium particles. We are going to continue to evaluate the effect of operational conditions and also evaluate the effect of modifiers on ruthenium agglomeration. A catalyst with <20 [Angstrom] ruthenium particles will be evaluated to investigate occurrence of cutoff, after no agglomeration conditions are identified. We are now proposing to conduct, parallel to the main approach, a second research approach which will aim at developing a ruthenium catalyst with substantially lower light ends selectivity while maintaining at …
Date:
January 1, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Tracer Developments: Results of Experimental Studies
Tracers can be used to monitor the movement of groundwaters and geothermal fluids and they can be used as a reference to quantify changes in fluid chemistry as a result of injection. Despite their potential importance to the geothermal operator, very few tracers are presently available and of those that are, little is known about their stability or behavior at the elevated temperatures that typify resources capable of electric power generation. During the past two years the University of Utah Research Institute has been involved in tracer research and testing, largely through the DOE Injection Research Program. The purpose of this paper is to summarize the results of these laboratory and field investigations.
Date:
January 21, 1986
Creator:
Adams, M. C.; Ahn, J. H.; Bentley, H.; Moore, J. N. & Veggeberg, S.
Object Type:
Article
System:
The UNT Digital Library
Influence of moisture on the behavior of aerosols
The behavior of aerosols assumed to be characteristic of those generated during light water reactor (LWR) accident sequences and released into containment has been studied in the Nuclear Safety Pilot Plant (NSPP) located at the Oak Ridge National Laboratory (ORNL). It has been observed that in a saturated steam-air environment a change occurs in the shape of aerosol agglomerates of U/sub 3/O/sub 8/ aerosol, Fe/sub 2/O/sub 3/ aerosol, and mixed U/sub 3/O/sub 8/-Fe/sub 2/O/sub 3/ aerosol from branched-chain to spherical, and that the rate of reduction in the airborne aerosol mass concentration is increased relative to the rate observed in a dry atmosphere. The effect of a steam-air environment on the behavior of concrete aerosol is different. The shape of the agglomerated concrete aerosol is intermediate between branched-chain and spherical and the effect on the rate of reduction in airborne mass concentration appears to be slight. In a related project the shape of an agglomerated Fe/sub 2/O/sub 3/ aerosol was observed to change from branched-chain to spherical at, or near, 100% relative humidity.
Date:
January 1, 1986
Creator:
Adams, R. E.; Longest, A. W. & Tobias, M. L.
Object Type:
Article
System:
The UNT Digital Library
Medical status of Marshallese accidentally exposed to 1954 Bravo fallout radiation, January 1983-December 1984
March 1, 1984, was the 30th anniversary of the Bravo thermonuclear test that resulted in the accidental exposure of the populations of Rongelap and Utirik atolls to radioactive fallout. The chronicling of the medical events resulting from that exposure is continued in this report, which covers the period from January 1983 through December 1984. An updated listing of all relevant publications from the Medical Department Brookhaven National Laboratory, is presented in the Reference Section. Thirty years of observation continue to show no detectable increase in mortality in the exposed population as a result of that exposure. The survival curves of the high-exposure Rongelap group, the low-exposure Utirik population, and an unexposed group of Rongelap people matched by age and sex to the exposed Rongelap group in 1957 continue to be similar. 89 refs., 2 figs., 6 tabs.
Date:
January 1, 1986
Creator:
Adams, W. H.; Engle, J. R.; Harper, J. A.; Heotis, P. M. & Scott, W. A.
Object Type:
Report
System:
The UNT Digital Library
Criteria for the selection of nuclides for radioimmunotherapy
This report describes many factors that need to be considered if radioimmunotherapy is to become a commonplace reality. For beta-emitting radionuclides, two physical features of importance are half-life and energy, with the latter determining the range. These features must be matched to the pharmacokinetics of the carrier and the distribution of the radionuclide, both macroscopically and microscopically. Alpha-particle emitters could be considered for cells that are readily accessible to the labeled antibody and for populations that uniformly and constantly display the targeted antigen or idiotype, e.g., trafficking cells such as T or B lymphocytes. For cells that concentrate the radioactive label, the use of low-energy electrons should be examined. If the radionuclide is translocated to the nucleus, the Auger effect can be particularly lethal because of the high LET-like biological response. 15 refs., 3 figs., 2 tabs.
Date:
January 1, 1986
Creator:
Adelstein, S. J. & Kassis, A. I.
Object Type:
Article
System:
The UNT Digital Library
ACTVE News, Volume 17, Number 1, January/February 1986
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
January 1986
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
New solution of the problem of EMP coupling on cables over ground of finite conductivity
This new solution replaces Dawson's Integral, in the old solution, by an infinite series. For typical EMP parameters, the solution is approximated by a double exponential function whose numerical constants are derived. Both forms of the new solution ae convenient for the calculation of the transient.
Date:
January 1, 1986
Creator:
Agouridis, D.C.
Object Type:
Article
System:
The UNT Digital Library
Polarized Proton Acceleration at the Brookhaven AGS
At the conclusion of polarized proton commissioning in February 1986, protons with an average polarization of 45%, momentum of 21.7 GeV/c, and intensity of 2 x 10/sup 10/ protons per pulse, were extracted to an external polarimeter at the Brookhaven AGS. In order to maintain this polarization, five intrinsic and nearly forty imperfection depolarizing resonances had to be corrected. An apparent interaction between imperfection and intrinsic resonances occurring at very nearly the same energy was observed and the correction of imperfection resonances using ''beat'' magnetic harmonics discovered in the previous AGS commissioning run was further confirmed.
Date:
January 1, 1986
Creator:
Ahrens, L. A.
Object Type:
Article
System:
The UNT Digital Library
Insider Protection: A Report Card
Enhanced security measures against external threats (e.g., terrorists, criminals) have been implemented at most facilities that handle special nuclear material, classified information, or other assets critical to national security. Attention is not focussing on insider protection, and safeguards managers are attempting to provide balanced protection against insider and outsider threats. Potential insider threats include attempts by facility employees to steal special nuclear material (SNM), to cause a radiological hazard to the public, to sabotage critical facilities, or to steal property or classified information. This paper presents a report card on the status of insider protection at Department of Energy and Nuclear Regulatory Commission-licensed facilities, with emphasis on SNM theft. We discuss the general trends in insider protection and the limitations of protection measures currently in use. We also discuss the most critical needs for improved procedures, technology, analytical tools, and education for safeguards personnel.
Date:
January 1, 1986
Creator:
Al-Ayat, R. A. & Judd, B. R.
Object Type:
Article
System:
The UNT Digital Library