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Träfflista för sökning "WFRF:(Dangtip S.) "

Sökning: WFRF:(Dangtip S.)

  • Resultat 1-43 av 43
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1.
  • Intarasiri, S., et al. (författare)
  • Activation energy of the growth of ion-beam-synthesized nano-crystalline 3C-SiC
  • 2007
  • Ingår i: Nuclear Instruments and Methods in Physics Research Section B. - : Elsevier BV. - 0168-583X .- 1872-9584. ; 257, s. 195-198
  • Tidskriftsartikel (refereegranskat)abstract
    • In this experiment, carbon ions at 40 keV were implanted into (10 0) high-purity p-type silicon wafers at 400 degrees C to a fluence of 6.5 x 10(17) ions/cm(2). Subsequent thermal annealing of the implanted samples was performed in a vacuum furnace at 800-1000 degrees C. Glancing incidence X-ray diffraction (GIXRD) was used to characterize the crystalline quality and estimate the grain size of nano-crystalline 3C-SiC. Activation energy for the growth of 3C-SiC was evaluated following the annealing behaviour of the GIXRD-characteristic 3C-SiC (111) peaks. It was found that the 3C-SiC was directly formed during ion implantation at this substrate temperature and the activation energy of the process was about 0.05 eV. Such a low energy was explained in terms of ion beam induced precipitate formation.
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  • Pomp, S, et al. (författare)
  • Nuclear Data for Medicine and Electronics
  • 2004
  • Ingår i: Proceedings of the International Workshop on Nuclear Data for the Transmutation of Nuclear Waste. - 3000122761
  • Konferensbidrag (refereegranskat)
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  • Tippawan, U, et al. (författare)
  • Light-ion production in the interaction of 96 MeV neutrons with carbon
  • 2009
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 79:6, s. 064611-
  • Tidskriftsartikel (refereegranskat)abstract
    • Double-differential cross sections for light-ion (p, d, t, He-3, and alpha) production in carbon induced by 96 MeV neutrons have been measured at eight laboratory angles from 20(degrees) to 160(degrees) in steps of 20(degrees). Experimental techniques are presented as well as procedures for data taking and data reduction. Deduced energy-differential, angle-differential, and production cross sections are reported. Experimental cross sections are compared with theoretical reaction model calculations and experimental data in the literature. The measured particle data show marked discrepancies from the results of the model calculations in spectral shape and magnitude. The measured production cross sections for protons, deuterons, tritons, He-3, and alpha particles support the trends suggested by data at lower energies..
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  • Öhrn, Angelica, et al. (författare)
  • Elastic scattering of 96 MeV neutrons from iron, yttrium, and lead
  • 2008
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 77:2, s. 024605-
  • Tidskriftsartikel (refereegranskat)abstract
    • Data on elastic scattering of 96 MeV neutrons from Fe-56, Y-89, and Pb-208 in the angular interval 10-70 degrees are reported. The previously published data on Pb-208 have been extended, as a new method has been developed to obtain more information from data, namely to increase the number of angular bins at the most forward angles. A study of the deviation of the zero-degree cross section from Wick's limit has been performed. It was shown that the data on Pb-208 are in agreement with Wick's limit while those on the lighter nuclei overshoot the limit significantly. The results are compared with modern optical model predictions, based on phenomenology and microscopic nuclear theory. The data on Fe-56, Y-89, and Pb-208 are in general in good agreement with the model predictions.
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22.
  • Blideanu, V., et al. (författare)
  • Nucleon-induced reactions at intermediate energies : New data at 96 MeV and theoretical status
  • 2004
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 70:1, s. 014607-
  • Tidskriftsartikel (refereegranskat)abstract
    • Double-differential cross sections for light charged particle production (up to A=4) were measured in 96 MeV neutron-induced reactions, at the TSL Laboratory Cyclotron in Uppsala (Sweden). Measurements for three targets, Fe, Pb, and U, were performed using two independent devices, SCANDAL and MEDLEY. The data were recorded with low-energy thresholds and for a wide angular range (20°–160°). The normalization procedure used to extract the cross sections is based on the np elastic scattering reaction that we measured and for which we present experimental results. A good control of the systematic uncertainties affecting the results is achieved. Calculations using the exciton model are reported. Two different theoretical approaches proposed to improve its predictive power regarding the complex particle emission are tested. The capabilities of each approach is illustrated by comparison with the 96 MeV data that we measured, and with other experimental results available in the literature.
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  • Blomgren, Jan, et al. (författare)
  • How Strong is the Strong Interaction?
  • 2004
  • Ingår i: Proceedings of the InternationalWorkshop on Nuclear Data for the Transmutation of Nuclear Waste. - 3000122761
  • Konferensbidrag (refereegranskat)
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  • Dangtip, S, et al. (författare)
  • A facility for measurements of nuclear cross sections for fast neutron cancer therapy
  • 2000
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - : ELSEVIER SCIENCE BV. - 0168-9002. ; 452:3, s. 484-504
  • Tidskriftsartikel (refereegranskat)abstract
    • A facility for measurements of neutron-induced double-differential light-ion production cross-sections, for application within. e.g.. fast neutron cancer therapy, is described. The central detection elements are three-detector telescopes consisting of two
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  • Dangtip, S, et al. (författare)
  • The 9-Be(n,p)9-Li reaction at En = 97 MeV
  • 1997
  • Ingår i: Proceedings of the International Conference on Nuclear Data for Science and Technology, Trieste, 1997. ; , s. 345-
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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28.
  • Dangtip, S, et al. (författare)
  • The Be-9(n,p)Li-9 reaction and the Gamow-Teller unit cross section
  • 2000
  • Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. - 0375-9474. ; 677, s. 3-24
  • Tidskriftsartikel (refereegranskat)abstract
    • Double differential cross sections of the Be-9(n,p)Li-9 reaction have been measured at 96 MeV in the angular range 0 degrees-27 degrees up to about 20 MeV excitation energy. In addition, the C-12(n,p)B-12 reaction has been measured in the same angular and
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29.
  • Hildebrand, Angelica, et al. (författare)
  • Elastic Neutron Scattering at 96 MeV
  • 2004
  • Ingår i: Proc. Int. Conf. on Nuclear Data for Science and Technology.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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  • Olsson, N, et al. (författare)
  • Neutron-proton scattering at 96 and 162 MeV
  • 1997
  • Ingår i: Proceedings of the International Conference on Nuclear Data for Science and Technology, Trieste, 1997. ; , s. 1230-
  • Konferensbidrag (refereegranskat)
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  • Olsson, N, et al. (författare)
  • Uppsala neutron-proton scattering measurements and the pi NN coupling constant
  • 2000
  • Ingår i: PHYSICA SCRIPTA. - : ROYAL SWEDISH ACAD SCIENCES. - 0281-1847. ; T87, s. 7-13
  • Tidskriftsartikel (refereegranskat)abstract
    • The differential np scattering cross section has been measured at 96 MeV and 162 MeV at backward angles at the neutron beam facility of the The Svedberg Laboratory in Uppsala. The angular distributions have been normalized to the experimental total np cro
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  • Rahm, J, et al. (författare)
  • np scattering measurements at 162 MeV and the pi NN coupling constant
  • 1998
  • Ingår i: PHYSICAL REVIEW C-NUCLEAR PHYSICS. - : AMERICAN PHYSICAL SOC. - 0556-2813. ; 57:3, s. 1077-1096
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The differential np scattering cross section has been measured at 162 MeV in the angular range theta(c.m.) = 72 degrees-180 degrees, using the neutron beam facility at The Svedberg Laboratory in Uppsala. Special attention was paid to the absolute normaliz
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37.
  • Rahm, J, et al. (författare)
  • np scattering measurements at 96 MeV - art. no. 044001
  • 2001
  • Ingår i: PHYSICAL REVIEW C. - : AMERICAN PHYSICAL SOC. - 0556-2813. ; 6304:4, s. 4001-
  • Tidskriftsartikel (refereegranskat)abstract
    • The differential np scattering cross section has been measured at 96 MeV in the angular range theta (c.m.) =74-180 degrees at the neutron beam facility of the The Svedberg Laboratory in Uppsala. A subset of the data, covering 116-180 degrees, has previous
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  • Tippawan, Udomrat, et al. (författare)
  • Double-differential cross sections and kerma coefficients for light-charged particles produced by 96 MeV neutrons on carbon
  • 2010
  • Ingår i: Radiation Measurements. - : Elsevier BV. - 1350-4487 .- 1879-0925. ; 45:10, s. 1134-1138
  • Tidskriftsartikel (refereegranskat)abstract
    • Double-differential cross sections of inclusive light-ion (p, d, t, He-3 and alpha) production in carbon induced by 96 MeV neutrons have been measured at eight laboratory angles from 20 to 160 in steps of 20 degrees. Experimental techniques, as well as procedures for data taking and data reduction, are presented. Deduced energy-differential and production cross sections are herewith reported. Experimental cross sections are compared with theoretical reaction model calculations and experimental data in the literature. The measured production cross sections for protons, deuterons, tritons, He-3, and alpha particles support the trends suggested by data at lower energies. Deduced partial kerma coefficients for carbon are also shown.
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  • Tippawan, Udomrat, et al. (författare)
  • Light charged-particle production in 96 MeV neutron-induced reactions on carbon and oxygen
  • 2007
  • Ingår i: Radiation Protection Dosimetry. - : Oxford University Press (OUP). - 0144-8420 .- 1742-3406. ; 126:1-4, s. 35-39
  • Tidskriftsartikel (refereegranskat)abstract
    • In recent years, an increasing number of applications involving fast neutrons have been developed or are under consideration, e.g. radiation treatment of cancer, neutron dosimetry at commercial aircraft altitudes, soft-error effects in computer memories, accelerator-driven transmutation of nuclear waste and energy production and determination of the response of neutron detectors. Data on light-ion production in tight nuclei such as carbon, nitrogen and oxygen are particularly important in calculations of dose distributions in human tissue for radiation therapy at neutron beams, and for dosimetry of high-energy neutrons produced by high-energy cosmic radiation interacting with nuclei (nitrogen and oxygen) in the atmosphere. When studying neutron dose effects, it is especially important to consider carbon and oxygen, since they are, by weight, the most abundant elements in human tissue. Preliminary experimental double-differential cross sections of inclusive light-ion (p, d, t, He-3 and alpha) production in carbon induced by 96-MeV neutrons have been presented. Energy spectra were measured at eight laboratory angles: 20, 40, 60, 80, 100, 120, 140 and 160 degrees. Measurements were performed at The Svedberg Laboratory (TSL), Uppsala, using the dedicated MEDLEY experimental setup. The authors have earlier reported experimental double-differential cross sections of inclusive light-ion production in oxygen. In this paper, the deduced kerma coefficients for oxygen has been presented and compared with reaction model calculations.
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41.
  • Tippawan, U., et al. (författare)
  • Light-ion production in the interaction of  96 MeV neutrons with silicon
  • 2004
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 69:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Double-differential cross sections for light-ion (p, d, t, He-3, and alpha) production in silicon, induced by 96 MeV neutrons, are reported. Energy spectra are measured at eight laboratory angles from 20degrees to 160degrees in steps of 20degrees. Procedures for data taking and data reduction are presented. Deduced energy-differential, angle-differential, and production cross sections are reported. Experimental cross sections are compared to theoretical reaction model calculations and experimental data in the literature.
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  • Resultat 1-43 av 43

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