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AbstractAbstract
[en] Structures and mechanical properties of TiAl-base alloys have been studied, in which Zr, Nb, V or Mn is added as the third element and Al content is changed. Behavior of the third element in the TiAl-base alloys and effects of various factors on ductility are discussed. It is concluded that the Ti-48.4 at% Al- 1.0 at% Mn alloy is the optimum composition for obtaining good room temperature ductility
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Liu, C.T. (Oak Ridge National Lab., TN (USA)); Taub, A.I. (General Electric Co., Schenectady, NY (USA). Corporate Research and Development Center); Stoloff, N.S. (Rensselaer Polytechnic Inst., Troy, NY (USA)); Koch, C.C. (North Carolina State Univ., Raleigh, NC (USA)); Materials Research Society symposium proceedings. Volume 133; 775 p; ISBN 1-55899-006-2; ; 1989; p. 391-396; Materials Research Society; Pittsburgh, PA (USA); 3. MRS symposium on high-temperature ordered intermetallic alloys; Boston, MA (USA); 28 Nov - 3 Dec 1988; CONF-8811161--; Materials Research Society, 9800 Mc Knight Rd., Suite 327, Pittsburgh, PA 15237 (USA)
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AbstractAbstract
[en] The size-distribution of the aerosol-attached radon progeny and the unattached (cluster) fraction were measured by using a low pressure cascade impactor and a single wire screen in a building of the nuclear facility. The radon concentration at the condition of ventilation 'ON' was about 50 Bq m-3, but it increased exponentially after ventilation 'OFF' and reached to the saturated concentration of about 600 Bq m-3. At the condition of low aerosol concentration without additional aerosol, the activity median aerodynamic diameter, the geometric standard deviation and the unattached fraction were, respectively, 0.3 μm, 2.7-2.9 and 0.3-0.5. On the other hand, at the condition of high aerosol concentration with burning a mosquito coil, these were, 0.3 μm, 2.1 and 0.02-0.03. These yield 2.5 times higher radiation dose conversion factors at the low aerosol condition than the high aerosol condition. (4 figs., 2 tabs.)
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China Society of Radiation Protection, Beijing, BJ (China); Japan Health Physics Society, Tokyo (Japan); 751 p; 1993; p. 591-594; Asia congress on radiation protection; Beijing (China); 18-22 Oct 1993
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AbstractAbstract
[en] The photonuclear reaction 9Be(γ,n) was used to measure the intensity I(2009.8) of the crossover E4 transition in 46Ti by an improved method. A point-like 46Sc source was used to provide the 46Ti. Neutrons generated by the 46Ti gamma rays were detected with BF3 counters. The observed intensity per decay of46Sc was I(2009.8) = (1.3+-1.0)x10-7, which agrees well with a previous estimate. From the present result the reduced transition probability B(E4)sub(ex) and the partial mean life-time tau(E4) of the crossover E4 transition between the 2009.8 keV, 4+ state and the ground state in 46Ti were estimated as B(E4)sub(ex)=(5.6+-4.9)x10-99e2 cm8 and tau(E4)=(1.7+-1.3)x10-5 s, respectively. (auth)
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11 refs.
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Journal Article
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Numerical Data
Journal
Canadian Journal of Physics; ISSN 0008-4204; ; v. 58(12); p. 1712-1717
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BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DAYS LIVING RADIOISOTOPES, ELEMENTARY PARTICLES, ENERGY LEVELS, EVEN-EVEN NUCLEI, FERMIONS, HADRONS, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, NUCLEI, NUCLEONS, NUMERICAL DATA, ODD-ODD NUCLEI, RADIATION SOURCES, RADIOISOTOPES, SCANDIUM ISOTOPES, SECONDS LIVING RADIOISOTOPES, STABLE ISOTOPES, TARGETS, TITANIUM ISOTOPES
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AbstractAbstract
[en] Modulated structures are regarded as a macrolattice, in which each lattice point is a ''unit region of concentration variation'' (abbreviated to ''unit region'') and an average lattice parameter is Qa0. The X-ray intensity diffracted from modulated structures, I/sub m(s) is given by I/sub m(s). I/sub d/(s). I/sub u/(s) is the scattering intensity from the ''unit region'' and I/sub u/(s) is that from the imaginary macrolattice in which each lattice point is the unit scattering factor. A region containing one zone-complex has been chosen as the ''unit region'' and the effects of the lattice spacing of the macrolattice and its disturbance on diffraction patterns have been discussed. When zone-complexes are small, I/sub m(s) is dominated by I/sub d/(s) and peaks of I/sub d/(s) are observed as side-bands or additional diffraction lines. The number of additional diffraction lines increases with an increase in Qa0 and typical side-bands appear at a stage of this process. When the periodicity of the macrolattice is distrubed deeply or Qa0 is large, I/sub u/(s) is observed directly as diffraction effects. The present theory explains reasonably the asymmetry of side-bands in position, the movement of main diffraction line with aging and the change of side-bands into diffraction lines of metastable phases during aging
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Journal Article
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Acta Metallurgica; v. 25(3); p. 295-303
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[en] The Tritium Process Laboratory (TPL) is the first facility which uses tritium over 1 gram (1 g=3.58 x 1014Bq) in the fusion research of Japan. Main objections of the TPL are to study basic engineering technology of tritium processing in the fusion fuel cycle and to develop tritium safety systems. Therefore, the few grams of tritium is handled in TPL. Internal exposure is more important than external exposure for the exposure control such as tritium treated facilities. In TPL, the internal exposure inspection is carried out by a simple internal exposure measurement method for tritium using expiratory water trapping apparatus with a water bubbler. The method is applied for workers who have a possibility to intake the tritium with their work. All the workers must also undergo the internal exposure inspection every month period. Generally method for measuring amount of tritium in the urine is used to evaluate the internal exposure. But a pre-processing equipment of urine is needed in this method. The expiratory water trapping apparatus only collect the expiratory water by the water bubbler. Therefore, the tritium internal dose is evaluated using expiratory water trapping apparatus in TPL. However, the fluctuation of collection efficiency of the apparatus before remodeling was about 40 - 90%. The collection efficiency is an important coefficient to evaluate the dose. The factor of fluctuation of the collection efficiency is that all of the tritiated water of the water bubbler in the apparatus can't be poured in the vial. Then, the apparatus was remodeled in order to collect the residual tritium in the apparatus. As the result, the collection efficiency increased about 85 - 96% with small fluctuation after the remodeling. (author)
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Japan Health Physics Society, Tokyo (Japan); 1 v; May 2000; [5 p.]; IRPA-10: 10. international congress of the International Radiation Protection Association; Hiroshima (Japan); 14-19 May 2000; This CD-ROM can be used for WINDOWS 95/98/NT, MACINTOSH; Acrobat Reader is included; Data in PDF format, No. P-3a-167; 4 refs., 4 figs., 1tab.
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AbstractAbstract
[en] Short communication
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Journal Article
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Urabe, I.; Yoshimoto, T.; Tsujimoto, T.; Katsurayama, K.
Proceedings of the second Asian regional congress on radiation protection, Manila, Philippines, 5-9 November 19791979
Proceedings of the second Asian regional congress on radiation protection, Manila, Philippines, 5-9 November 19791979
AbstractAbstract
No abstract available
Source
64 p; 1979; p. 27; 2. Asian regional congress on radiation protection; Manila (Philippines); 5-9 Nov 1979; Report also available from Philippine Association of Radiation Protection c/o Radiation Health Office, Ministry of Health, San Lazaro Compound, Rizal Avenue, Sta Cruz, Manila, Philippines; Published in abstract form only.
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Miscellaneous
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Yamasaki, K.; Okamoto, K.; Tsujimoto, T.; Katsurayama, K.
Proceedings of the second Asian regional congress on radiation protection, Manila, Philippines, 5-9 November 19791979
Proceedings of the second Asian regional congress on radiation protection, Manila, Philippines, 5-9 November 19791979
AbstractAbstract
No abstract available
Source
64 p; 1979; p. 39; 2. Asian regional congress on radiation protection; Manila (Philippines); 5-9 Nov 1979; Report also available from Philippine Association of Radiation Protection c/o Radiation Health Office, Ministry of Health, San Lazaro Compound, Rizal Avenue, Sta Cruz, Manila, Philippines; Published in abstract form only.
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AbstractAbstract
[en] Instrumental neutron activation analysis was applied to multielement trace analysis of high purity aluminium samples. In order to reduce the production of 24Na from the matrix, samples were activated by thermal neutron flux of high cadmium ratio. Detection limits of various impurity elements were evaluated. So called ''five nine'' class standard aluminium samples were analyzed and concentrations of various impurity elements were determined. The analytical results obtained on zone refined aluminium samples showed that zone refining is effective against many elements, such as Na, Cr, Fe, Co, Cu, Ga, As, Br, Ba, La, Ce, Sm, Yb, Lu, Hf, W, Th and U, but not very effective against the element Sc. Several tables are given. (author)
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2 figs.; 5 refs.; 6 tabs.
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Journal Article
Journal
Journal of Radioanalytical Chemistry; v. 42(1); p. 143-152
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Yamasaki, K.; Urabe, I.; Yoshimoto, T.; Okamoto, K.; Tsujimoto, T.; Katsurayama, K.
Radiation - risk - protection. Vol. 31984
Radiation - risk - protection. Vol. 31984
AbstractAbstract
No abstract available
Secondary Subject
Source
Kaul, A.; Neider, R.; Pensko, J.; Stieve, F.E.; Brunner, H. (eds.); 545 p; ISBN 3-88585-170-9; ; 1984; p. 1038-1041; Verl. TUEV Rheinland; Koeln (Germany, F.R.); 6. international congress of the International Radiation Protection Association (IRAP-6) and exhibition; Berlin (Germany, F.R.); 7-12 May 1984; Published in summary form only.
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