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  • 1
    Electronic Resource
    Electronic Resource
    Inherent peculiarities in nuclear reaction analysis (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1557-1559 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A detailed description of the kinematics governing a nuclear reaction analysis is presented for exothermic reactions. In particular, the peculiar behavior demonstrated when the emitted particle energy decreases with increasing bombarding energy is emphasized. The method is applied to 16O(d,p)17O and D(d,p)T reactions from SiO2 and D2O targets, respectively. Moreover, an algorithm was written to compute reaction cross sections as a function of energy or concentration as a function of depth from the measured reaction yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341834
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  • 2
    Electronic Resource
    Electronic Resource
    Prognosis and work absence due to occupational contact dermatitis (2002)
    Oxford, UK : Munksgaard International Publishers
    Contact dermatitis 46 (2002), S. 0 
    Details
    ISSN: 1600-0536
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The consequences of a diagnosis of occupational contact dermatitis (OCD) were investigated using cases available from the voluntary surveillance scheme, EPIDERM. Cases of OCD reported from November 1994 to September 1995 were identified and sampled to give at least 100 cases of allergic, irritant and mixed OCD reported by consultant dermatologists (344 cases) and occupational physicians (377 cases). A questionnaire was sent to the reporting physician to elicit further information. 512 completed questionnaires were returned, of which 510 were eligible for analysis. Among cases reported by dermatologists (n = 286) and occupational physicians (n = 224), 7% (6.3%) had been unemployed and 16.8% (20.1%) had taken sick leave. 3 factors independently predicted time off work in a logistic regression analysis: age OR = 1.25 (95% CI, 1.05–1.49), allergic dermatitis OR = 1.77 (95% CI, 1.13–2.79) and medicolegal assessment OR = 4.42 (95% CI, 2.20–8.89). Overall, 15.7% did not improve clinically between the first and last visit. Those who did not improve had been exposed to the agent for longer (mean 7.6 years) than those who did (5.3 years) (p = 0.09). In patients ≤ 45 years, those reported to be atopic failed to improve (25.4%) more often than those not atopic (13.4%) (p = 0.04). The substantial numbers (21%) with time off work and with persistent dermatitis suggest that OCD continues to have a significant impact on workers and their employers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-0536.2002.460505.x
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  • 3
    Electronic Resource
    Electronic Resource
    Superconductivity in simple cubic Te—Au alloys produced by ion irradiation (1979)
    Springer
    The European physical journal 36 (1979), S. 47-56 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Superconducting simple cubic Te100−x Au x films (10〈x〈90) were produced by He+-irradiation at low temperatures as well as at room temperature. After low temperature irradiation the as-irradiated disordered samples forx〈60 at % Au are in a semiconducting state which becomes unstable at about 230 K, and then transform into the s.c. superconducting phase. The resistivity of the s.c. phase displays a negative temperature coefficient for residual resistivity values larger than 100 μΩ cm. In comparison to “splat cooled” foils, the s.c. Te—Au phase in the He+-irradiated films is more homogeneous. The observed variation of the transition temperature to the superconducting state with Au content is explained as an interaction of the Fermi-surface with several Bragg-planes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333953
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  • 4
    Electronic Resource
    Electronic Resource
    A sub-atomic microscope, superfocusing in channeling and close encounter atomic and nuclear reactions (2004)
    Springer
    The European physical journal 42 (2004), S. 361-365 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. A highly collimated beam of protons ( $\approx$ 1 MeV) entering the channel of a monocrystal film forms at a certain depth an extremely sharp (〈0.005 nm) and relatively long (some monolayers of the crystal) focusing area where the increase of the flux density can reach thousand times. Impinging atoms in this focusing area can undergo nuclear or atomic reactions with proper foreign dopants which disappear if the crystal is tilted from this position by only 10-3 radians. This effect can be called channeling superfocusing, in contrast to the ordinary fluxpeaking where the increase of flux density reaches only few times. Results are predicted by quantum mechanical model calculations and confirmed by channeling Monte Carlo simulations accounting for several properties of the real lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjb/e2004-00391-6
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  • 5
    Electronic Resource
    Electronic Resource
    Current-induced resistive state of superconducting tin whiskers with indium impurities (1979)
    Springer
    The European physical journal 32 (1979), S. 363-374 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have investigated the current-induced step-like structure in theV−T andV−I characteristics of tin whiskers with a mean free pathl for the electrons which is reduced by indium impurities (up to 3.6 at %). The extrapolation of theV−I characteristics beyond the first voltage step shows a zero-voltage interceptI 0≈0.5I c (I c=critical current). From the differential resistance beyond the first voltage step a lengthL An1 can be obtained which is proportional tol 1/2. These results can be understood by assuming phase-slip centers in the whisker which carry a time-averaged supercurrent of approximately 0.5I c above the critical current, and at which a voltage is developed by the “healing” of nonequilibrium quasiparticles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02109465
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  • 6
    Electronic Resource
    Electronic Resource
    Negative differential resistance in theV(I)-characteristic of superconducting Sn-whiskers (1975)
    Springer
    Applied physics 7 (1975), S. 127-130 
    Details
    ISSN: 1432-0630
    Keywords: Superconductivity ; Non-equilibrium transport properties ; Current induced transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The current-induced step structure in the phase transition from the superconducting to the normal conducting state of whiskers of tin shows hysteretic behaviour. By shunting the whisker by a small normal conductor a stable reentrant part of theV(I)-characteristic (negative differential resistance) could be measured for the first step both by de and ac instruments. If the condition of stabilization is not fullfilled, the voltage in the hysteretic region shows oscillations. These oscillations were measured and calculated with a simple model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00884222
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  • 7
    Electronic Resource
    Electronic Resource
    New lasers II (1982)
    Springer
    Applied physics 28 (1982), S. 233-239 
    Details
    ISSN: 1432-0649
    Keywords: 42.70 ; 42.55 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697850
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  • 8
    Electronic Resource
    Electronic Resource
    Spannungsstufen in denU (T)-Übergangskurven undU (I)-Kennlinien stromtragender Zinn-Whisker (1973)
    Springer
    Applied physics 2 (1973), S. 303-320 
    Details
    ISSN: 1432-0630
    Keywords: Superconductivity ; Non-equilibrium transport properties ; Current induced transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The current induced phase transition from the superconducting to the normalconducting state is studied in whiskers of tin. Transition curves were taken byU(T)-measurements at steady currents as well as characteristic curves byU (I)-measurements at fixed temperatures. For larger current intensities these curves show voltage steps which increase linearly with current intensity. The onset of voltage reading appears at the critical current density, as predicted by theory. The step structures are, however, observed at current densities which are several times larger than the critical ones. The influence of a magnetic field on the location and the structure of the curves was measured and is compared to theoretical predictions. At temperatures close toT co whiskers are onedimensional with respect to the superconducting orderparameter because of their small diameters. Therefore, intermediate state pattern and flux flow are rejected as an explanation of the observed structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00896936
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  • 9
    Electronic Resource
    Electronic Resource
    XRF induced by PIXE: Comparison with radioisotope XRF (1987)
    Springer
    Applied physics 42 (1987), S. 327-329 
    Details
    ISSN: 1432-0630
    Keywords: 79.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract XRF induced by PIXE (XRF-PIXE) using silver as a primary target was compared with a standard radioisotope XRF system using Cd-109 as a primary exciting source, for the analysis of single-element thin standards. The sensitivity of the two methods were determined for elements from Cl to Mo. XRF is found to be more sensitive for elements from Cl to Mn, whereas XRF-PIXE is found to be more suitable for elements from Fe to Mo. Both techniques can be considered as complementary to each other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00616571
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  • 10
    Electronic Resource
    Electronic Resource
    Spark source mass spectrometric calibration of the local vibrational mode absorption of carbon in gallium arsenide on arsenic sublattice sites (1999)
    Springer
    Fresenius' journal of analytical chemistry 364 (1999), S. 768-771 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An appropriate calibration of the local vibrational mode absorption of carbon in GaAs on arsenic sublattice sites, CAs, at wavenumber 582 cm–1 (77 K) is presented. Integrated absorptions Iα of CAs, the dominant acceptor in undoped monocrystalline GaAs, and calibrated carbon concentrations [C] were measured in single crystals using the methods FTIR and SSMS, respectively. A calibration factor fC = [C]/Iα of (7.1 ± 0.2) × 1015 cm–1 has been derived for 2.8 × 1014 cm–3≤ [C] ≤ 1.4 × 1016 cm–3 above a SSMS detection limit of [C]DL≅ 1.4 × 1013 cm–3. The carbon concentrations [C] = [C]SSMS/RSCC were calibrated with a relative sensitivity coefficient RSCC = [C]SSMS/ [C]TRUE of 3.1 ± 0.1. CPAA was used as a reference method for [C]CPAA≥ 4.4 × 1014 cm–3 in order to approximate [C]TRUE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051430
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