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  • 1
    Electronic Resource
    Electronic Resource
    Die Lebensdauer des 23/2-Dreiteilchenniveaus des Hafnium 177 und sein Zerfall durchK-verbotene Gamma-Übergänge (1966)
    Springer
    The European physical journal 190 (1966), S. 60-80 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An isomeric state of Hf177 withT 1/2=(1,12±0,10)s was found by a fast chemical separation of the hafnium daughter from the 155d Lu177m activity. We measured the same half-life by observing the delayedβ-γ-coincidences. A systematic investigation of the whole region 5s≧T 1/2≧10−7s by the technique of delayed coincidences gave no further isomerism. We assign the observed half-life to the 23/2 three particle state of Hf177 at 1315 keV and assume that the second hypothetical three particle state at 1337 keV does not exist. The 21/2 rotational state of theK=9/2 band is populated by a strongly converted 14,16 keVγ-transition from the isomeric state at 1315 keV. The 14,16 keVM I andN I conversion lines were observed by use of a double focusing magneticβ-spectrometer. The isomerism is caused by theK-selection rule. The retardation of the following threeγ-transitions by different degrees ofK-forbiddeness is discussed. The pulse height spectrum, measured by means of a Li-drifted Ge-detector, does not show the 36,52 keV-γ-transition which was previously assumed to populate the 1301keV-state. In addition to the knownγ-transitions we found a 40,9 keV-line. This is probably the transition between the 1301,1 keV and the 1260,3 keV-states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01340348
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  • 2
    Electronic Resource
    Electronic Resource
    Messung der Neutronenpolarisation bei der Reaktion12C(d, n 0)13N mit Hilfe der Mott-Schwinger-Streuung (1969)
    Springer
    The European physical journal 221 (1969), S. 379-400 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The polarization of neutrons produced in the reaction12C(d, n 0)13N was measured. Deuterons from the Karlsruhe isochronous cyclotron were used to induce this reaction at 51,5 MeV laboratory energy. The degree of polarization was determined by using the special features of Mott-Schwinger scattering. With an uranium scatterer analysing efficiencies of up to 0.92 can be obtained at very small angles (0.23°). The analysing efficiency can be calculated if the differential cross section at 0° and the total cross section is known. These quantities were experimentally determined. The differential cross section for 49.4 MeV neutrons, scattered by uranium, was measured between 0.88° and 2.10°. By an extrapolation the value 43.4±2.6 b/sr was found for the nuclear differential cross section at zero degree. A total cross section ofσ t=4.80±0.22 b was obtained. The neutron polarization was measured at a reaction angle of 24.5° and the result isP=−0.45±0.07. This value is fairly above the semiclassical 1/3 limit and can be only explained, if spin orbit forces are taken into account. For (d, n) reactions this is the first neutron-polarization measurement above an energy of 20 MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394069
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  • 3
    Electronic Resource
    Electronic Resource
    Experimentelle Untersuchungen der Reaktionenp (d, pp) n undd (d, dp) n mit 51,5 MeV Deuteronen (1968)
    Springer
    The European physical journal 217 (1968), S. 350-372 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The external beam of 51.5 MeV deuterons from the Karlsruhe isochronous cyclotron was used to investigate the three particle reactionsp(d,pp)n andd(d, dp)n. A kinematically complete experiment was performed by detecting the two emitted protons respectively the proton and the deuteron in coincidence. The data for the reactionp (d, pp) n exhibit a pronounced final state interaction between the outgoing neutron and one proton. This final state interaction is mainly due to then— p singlet interaction and the extractedn— p scattering length is ¦as¦=(19±2.5) fm. In the investigation of the reactiond(d, dp)n the angles were chosen as to observe quasielastic deuteron-proton-scattering predominantly. The data was analysed in terms of the Chew Low Spectator model and we obtained by “on-energy-shell” extrapolation for thed−p cross section the value (7±2.5) [mb/sr]. This value has to be compared with the cross section for freed−p scattering which was independently measured and the value obtained for the corresponding angle is (16±1) [mb/sr].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01391477
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  • 4
    Electronic Resource
    Electronic Resource
    The reactiond+d→p+t and elastic deuteron-deuteron scattering at 51.5 Mev (1970)
    Springer
    The European physical journal 230 (1970), S. 383-390 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The elastic deuteron-deuteron scattering and the reactionsd(d,p)t andd(d,3He)n have been investigated at an incident deuteron energy of 51.5 MeV. Time-of-flight technique was used for the particle identification. The observed angular distributions for the (d, p) and (d, n) reaction are identical within the accuracy of the experimental data. The experimental results for the reactiond(d, p)t are compared with a theoretical prediction based on the application of a generalized separable potential model to the four nucleon systems. Information on the single deuteron break-up reactiond+d→d+p+n and on the double deuteron break-up reactiond+d→p+p+n+n is contained in the observed continuous proton and deuteron spectra. The double break-up seems to be contribute only with a rather small amount to the whole break-up cross section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403126
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  • 5
    Electronic Resource
    Electronic Resource
    The break-up reactionp+d→p+p+n (1970)
    Springer
    The European physical journal 235 (1970), S. 453-462 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The three-particle reactionp+d→p+p+n has been investigated at a deuteron bombarding energy of 52.0 MeV. Single counter experiments as well as coincidence measurements have been carried out. The laboratory angular distribution of the break-up reaction and the total break-up cross-section have been determined by means of the single counter experiments. The angular distribution for final-state interacting neutron-proton pairs was obtained by means of coincidence measurements. The coincidence experiments provide a strong evidence for very different shapes of the angular distributions for neutron-proton singlet and triplet final-state interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394936
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