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  • 1985-1989  (30)
  • 1980-1984  (7)
  • 1970-1974  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Kinetic properties of cerebral 5′-nucleotidase (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 19 (1972), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1972.tb01468.x
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  • 2
    Electronic Resource
    Electronic Resource
    A new detection scheme for Fourier transform-ion cyclotron resonance spectrometry in Penning traps (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2631-2634 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new detection scheme for Fourier transform-ion cyclotron resonance (FT-ICR) studies is proposed and initial experimental results are presented. While in conventional FT-ICR, the difference of the transient signals from two opposite electrodes is recorded and Fourier transformed, it is also possible to use the sum of these signals. In this way resonances are observed at the harmonic of the reduced cyclotron frequency 2 ν+ as well as ν+−ν− and ν++ν−, the later being important for accurate mass measurements. The experiments were performed with a Penning trap in an electromagnet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140683
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  • 3
    Electronic Resource
    Electronic Resource
    Levelcrossing experiments in the first excited1 P 1 states of the alkaline earths (1974)
    Springer
    The European physical journal 270 (1974), S. 295-309 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the lowest1P1 state of25Mg,43Ca,87Sr,135Ba and137Ba have been measured by the level-crossing and anticrossing technique. The magnetic dipole and electric quadrupole coupling constants determined by these measurements are25Mg(3s3p1P1):A=− 7.7(5) MHz; 16 MHz〉B〉0 MHz,43Ca(4s4p1P1):A=− 15.3(4) MHz; ¦B¦〈12 MHz,87Sr (5s5p1P1:A=− 3.4(4) MHz;B=39(4) MHz,135Ba(6s6p1P1):A=− 97.5(1.0) MHz;B=31(9)MHz,137Ba(6s6p1P1):A=−109.2(1.2) MHz;B=51(12)MHz. The results have been compared with the predictions of the Breit-Wills theory of the two-electron hyperfine structure using the experimental data on the3P states. Large discrepancies have been observed which are due to different radial wave functions of thes andp electron in the triplet and singlet system. This effect has been taken into account by fitting the data with the aid of two additional parameters. That this procedure is justified is shown by an analysis of the fine structure splitting, the life times, and the isotopic shifts in thesp configurations of group II elements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01677766
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of the isotope shift in theD 1 line between197Au and195Au (1983)
    Springer
    The European physical journal 309 (1983), S. 187-192 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isotope shift between197Au (stable) and195Au (T 1/2=183 d) was determined by resonance fluorescence and polarization spectroscopy in the 6s2 S 1/2 -6p 2 P 1/2, λ =267.6nm line. The result is δν195, 197=-2.9(2) GHz corresponding to a change of the mean-square charge radius by δ〈r 2〉195, 197=0.063(9) fm2. The sample was confined to a resonance cell heated to temperatures of up to 1500°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413748
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  • 5
    Electronic Resource
    Electronic Resource
    γ-Spectroscopy of 89 215 Ac126 and proton pairing inN=126 isotones (1983)
    Springer
    The European physical journal 310 (1983), S. 55-59 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Theγ-decay of 5 excited states along the yrast line has been observed in215Ac by inbeamγ-spectroscopy. Lifetimes andg-factors of 3 isomeric levels have been measured. The data show that pairing dominates the structure ofN=126 isotones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01433610
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  • 6
    Electronic Resource
    Electronic Resource
    Isotope shifts of neutron-deficient gold isotopes with 193≧A≧190 (1985)
    Springer
    The European physical journal 321 (1985), S. 537-547 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.-k ; 27.80+w ; 31.30.Gs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The isotope shift between197Au (stable) and the radioactive Au isotopes190Au,191Au,192Au and193Au were determined by resonance fluorescence spectroscopy in the 6s 2 S 1/2–6p 2 P 1/2.λ=267.6nm line. The unstable Au isotopes were produced at the ISOLDE mass separator at CERN. The nuclei were investigated semi on-line in a resonance vessel, heated to 1,400°C. The results areδν 190,197=−11.12(39) GHz,δν 191,197=−9.67(12) GHz,δν 192,197=−8.32(15) GHz,δν 193,197=−6.29(11) GHz, corresponding to a change of the mean-square charge radius byδ〈r 2〉190,197 =0.261(12) fm2,δ〈r 2〉191,197=0.227(5) fm2,δ〈r 2〉192,197=0.195(5) fm2,δ〈r 2〉193,197 =0.148(4) fm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432427
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Trace detection of plutonium by three-step photoionization with a laser system pumped by a copper vapor laser (1985)
    Springer
    Applied physics 38 (1985), S. 249-253 
    Details
    ISSN: 1432-0649
    Keywords: 32 ; 42.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser photoionization has been used to detect trace amounts of plutonium. A high sensitivity and selectivity has been achieved by applying three-step excitation and ionization of the plutonium atoms with high pulse-repetition rates and additional mass determination by time-of-flight measurements. A laser system was developed which consists of a copper vapor laser pumping three dye lasers simultaneously. Samples containing between 1010 and 1012 atoms of239Pu on Re filaments were measured yielding strong resonance signals with maximum ion count rates of several kHz at a vanishingly low background. A detection efficiency of 10−7 was determined allowing the detection of about 108 plutonium atoms in a sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00818051
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  • 8
    Electronic Resource
    Electronic Resource
    Impaired blood pressure response to norepinephrine in a case of insulin-dependent diabetes mellitus — Improvement with a β-adrenergic antagonist (1984)
    Springer
    Journal of molecular medicine 62 (1984), S. 366-370 
    Details
    ISSN: 1432-1440
    Keywords: Diabetic neuropathy ; Adrenergic receptors ; Orthostatic hypotension ; β-Blocking agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of juvenile-onset insulin-dependent diabetes mellitus in a 30-year-old male patient is reported. He was admitted to the hospital because of severe diabetic neuropathy, predominantly in the lower extremities. Signs of autonomic neuropathy were not evident but the patient had severe orthostatic hypotension. Circulating catecholamine concentrations were normal; however, the blood pressure response to infused norepinephrine was reduced ten-fold compared to a group of normals. An improvement of the blood pressure response to sympathomimetic drugs was accomplished during the simultaneous administration of propranolol, a β-receptor blocking agent. The present data suggest a possible defect of the adrenergic receptor system in response to sympathomimetic drugs while the release of catecholamines and the function of the parasympathetic nervous system appears to be intact. Treatment with β-blocking agents such as propranolol as an adjunct to sympathomimetics seems to be a promising approach which might deserve further consideration in similar cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01716256
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  • 9
    Electronic Resource
    Electronic Resource
    Laser resonant ionization of plutonium (1985)
    Springer
    Applied physics 38 (1985), S. 65-70 
    Details
    ISSN: 1432-0649
    Keywords: 42.80 ; 32.80F ; 32.80H
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Resonance ionization mass spectrometry (RIMS) has been tested for the isotope-selective determination of trace amounts of plutonium. An atomic beam is formed by evaporating plutonium atoms from a rhenium-filament heated to 1800 °C. The radiation of a pulsed dye laser excites the atoms in a two-photon process (λ=595.2 nm) followed by photoionization of the excited atoms. Mass selectivity is obtained by use of a time-of-flight spectrometer. A resonant signal of239Pu was measured with 1013 atoms deposited on the filament.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691772
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  • 10
    Electronic Resource
    Electronic Resource
    Resonance lonization mass spectroscopy with a pulsed thermal atomic beam (1987)
    Springer
    Applied physics 44 (1987), S. 339-345 
    Details
    ISSN: 1432-0630
    Keywords: 07.65.Eh ; 32.70.Fw ; 32.80.Dz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Resonance ionization mass spectroscopy (RIMS) and pulsed-laser induced desorption (PLID) have been combined for ultrasensitive detection and spectroscopy of very small samples of refractive elements. The method has been tested and applied to laser spectroscopy of 5×109 atoms (1.5 pg) of195Au (T 1/2= 183d) implanted at the ISOLDE online mass separator with 60 keV into graphite. A pulsed thermal atomic beam was formed by laser desorption with a 10 ns Nd∶Yag laser pulse. Subsequently the atoms were photoionized in a three-colour, three-step resonant excitation to an autoionizing state. The selectivity was enhanced by a time-of-flight measurement of the photo ions. In resonance, one ion was detected per 105 atoms implanted resulting in a gain in detection efficiency by three orders of magnitude in comparison to the use of a continuous atomic beam. In the course of the experiments several unknown autoionizing states were found, and the lifetime of the 6d 2 D 3/2 state of gold was determined to beτ=10.7(6) ns.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624601
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