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  • Electronic Resource  (3)
  • 21.60.Ev  (1)
  • 24.60. Dr  (1)
  • Co-Cu-O  (1)
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  • Electronic Resource  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Two proton high-spin excitations and dipole bands in192Hg (1994)
    Springer
    The European physical journal 348 (1994), S. 87-93 
    Details
    ISSN: 1434-601X
    Keywords: 27.80.+w ; 21.10.Hw ; 21.60.Ev
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The192Hg nucleus was populated in the160Gd(36S, 4n) reaction at a beam energy of E=159 MeV. Emittedγ-rays were detected with the EUROGAM array comprising 43 Compton-suppressed large volume Ge detectors. The level scheme of192Hg has been extended up to an excitation energy of E=10.4 MeV and spin I=34 ħ. Two new structures, made of competing ΔI=1 and ΔI=2 transitions have been observed and their connexions with the low-lying levels established. Their lowest levels are located at 6.304 MeV and 6.879 MeV excitation energy. The experimental results are compared with mean-field HF+BCS calculations. It is proposed that the new structures originate from deformation-aligned quasi-proton excitations π(i13/2 * h9/2)K=11 andπ (h9/2) K=8 2 , coupled to rotation-aligned quasi-neutron ν(i13/2)n and quasi-proton π(h11/2)2 excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289594
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the layer sequence and morphology in solid-state displacement reactions (1984)
    Springer
    Oxidation of metals 22 (1984), S. 161-180 
    Details
    ISSN: 1573-4889
    Keywords: displacement reactions ; ternary diffusion ; multiphase diffusion ; diffusion path ; Ni-Cu-O ; Co-Cu-O ; Fe-Ni-O ; Fe-Cu-O ; Cu-Ni-S ; Fe-Ni-S ; Cr-Ni-S
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In displacement reactions of the type pA+BqX→qB+ApX, two main forms of the layer sequence have been found in the reaction layer, namely, A/ApX/B/BqX and A/B/ApX/BqX. In this paper it is argued that the thermodynamics of the system, more specifically the dependence of the activity of element X on the mole ratio between the elements A and B, determines the initial layer sequence. Various morphological variants of the two basic types may develop because of the kinetics. The prediction of the layer sequence and morphology made on the basis of this theory has been verified on a number of oxidic and sulfidic systems. It is, however, pointed out that these predictions also can be applied to purely metallic ternary systems and to other types of reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656903
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Competition between few nucleon emission andγ-ray deexcitation for the reaction systems65Cu+87Rb and40Ar+110Pd (1985)
    Springer
    The European physical journal 322 (1985), S. 393-414 
    Details
    ISSN: 1434-601X
    Keywords: 24.60. Dr ; 25.70. Gh ; 25.70. Jj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Bothγ-ray and neutron emission have been studied for the reaction systems65Cu(237MeV) +87Rb→152Dy* and40Ar(158MeV)+110Pd→150Gd*. By using a sum spectrometer in coincidence with neutron counters, Ge(Li) or Nal detectors, we have measured the totalγ-ray energy and the average totalγ-multiplicity distributions as well as the neutron spectra for various exit channels. These measurements provide strong evidence for thermal equilibrium in reactions involving a small number of emitted neutrons (i.e.87Rb(65Cu,n or 2n)) at rather high excitation energy (∼54MeV). This statistical emission of only a few neutrons is controlled by very strong y-ray competition: theγ-entry line is found not to be parallel to the yrast line. Instead the energy gap is about 8MeV for J∼27ħ and rises to at least 13MeV for J∼36ħ. There are some indications that the main part of the energy from this gap is removed by statisticalγ-ray cascades. The main features of the experimental data for both entrance channels are well reproduced by statistical model calculations with proper attention to the yrast line position and an adjustement of the dipoleγ-ray normalization coefficient. It is conceivable that the y-ray enhancement that we introduce may be related to a lack of knowledge of the absolute level densities at high energy and spin, or possibly to the presence of new or additional degrees of freedom that may enter into the competition between neutron andγ-ray emission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412074
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    Paper (German National Licenses)
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