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  • 11
    Electronic Resource
    Electronic Resource
    Measurement of spin alignment for the ^1^5N"3"2 (6.33 MeV) state from the (^1^6O, ^1^5N) reaction using γ-recoil in flight
    Amsterdam : Elsevier
    Physics Letters B 80 (1979), S. 208-211 
    Details
    ISSN: 0370-2693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0370-2693(79)90199-0
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  • 12
    Electronic Resource
    Electronic Resource
    Observation of the nuclear rainbow scattering for12C+12C atE Lab =300 MeV (1982)
    Springer
    The European physical journal 308 (1982), S. 121-131 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The elastic and inelastic scattering of12C on12C has been measured in the angular range between 2.8° and 70.4° in the c.m. system atE Lab =300 MeV. Optical model calculations have been performed with Woods-Saxon and folded potentials, the ground state and the first 2+-state were coupled in the calculations. The large cross sections of the elastic scattering at large angles is related to the nuclear rainbow scattering, which is centered at about 56°. This requires a potential depth of 100 MeV at a distance of 3 fm, the fit to the data is sensitive down to this region. The calculations with the folded potential show a better agreement with the data than those with the Woods-Saxon shape. The total reaction cross section of 1,420 mb, obtained from the optical model analysis, corresponds to the geometrical value; no transparency is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413002
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  • 13
    Electronic Resource
    Electronic Resource
    Refractive scattering and the nuclear rainbow in the interaction of12, 13C with12C at 20MeV/N (1985)
    Springer
    The European physical journal 322 (1985), S. 241-261 
    Details
    ISSN: 1434-601X
    Keywords: 24.10.−i ; 25.70.Cd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The elastic and inelastic scattering and the neutron transfer have been measured for the systems12C +12C and13C +12C at 20MeV/N up to θcm= 60° with theQ3D -spectrometer. The angular distributions of the elastic scattering show an enhanced cross section at angles larger than 40°. It can be identified as refractive scattering with the clear signature of a nuclear rainbow.L-cut-off calculations show that these contributions come fromL-values which are significantly lower than the grazingL-value. The deflection function has a broad minimum in thisL-range which is typical for rainbow scattering. TheS-matrix is decomposed by a phenomenological parametrization into a refractive and a diffractive part. The interference of these amplitudes plays an important role in the rainbow enhancement. The spatial localization of the refractive scattering is deduced from the turning points of the corresponding trajectories; a localization between 2.5 fm and 4 fm is found. Semi-classical calculations with complex trajectories in the single-turning-point approximation show good agreement with the quantummechanical calculations. Refractive contributions are not observed in the inelastic scattering. This can be explained by reducing the strength of the conventional collective form factor in the internal region. In contrast to this the enhancement at large angles is seen in the one-neutron transfer channels where the refractive scattering is dominant. This is the first observation of such contributions to heavy-ion transfer reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411889
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  • 14
    Electronic Resource
    Electronic Resource
    Study of reaction asymmetries and spin orbit interaction of13C and11B in (12C,13C) and (12C,11B) reactions on208Pb (1984)
    Springer
    The European physical journal 315 (1984), S. 81-89 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of neutron pick-up and proton stripping reactions in the interaction of12C on208Pb have been studied atE L =101 MeV with high accuracy using aQ3D magnetic spectrometer. Angular distributions of the single particle states are discussed in terms of reaction asymmetriesA ij (Θ). With these quantities the relative changes of the shapes of angular distributions can be studied in detail. The transferedl-value has been found to have a large effect on the shapes. For the case of13C an overall description of this quantity is obtained, if a spin-orbit interaction for13C is introduced with a sign which is opposite to that found in (14C,13C) reactions. For the case of11B the reaction asymmetries cannot be described by a spin-orbit interaction. The possible origin of the spin-orbit effects is discussed. The particular discrepancies to a simple DWBA description (without spin-orbit interaction) found in both the13C and11B angular distributions must be attributed to coupling effects in the initial channel, where the 2+ state of12C and 3− state of208Pb are excited, and to smaller extend to higher order couplings in the final channel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01436212
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  • 15
    Electronic Resource
    Electronic Resource
    Spin alignment and polarisation in the (16O,15N) transfer reactions (1979)
    Springer
    The European physical journal 291 (1979), S. 151-161 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spin alignment of the15N 3 2/* (6.33 MeV) state was measured in the88Sr(16O,15N)89Y reaction atE L =96 MeV using theγ-recoil method. Angular distributions of excited states in15N and89Y were measured with high accuracy. The analysis in terms of DWBA shows that the spin alignment is correctly described by the usual reaction models. The polarisation of the outgoing15N1/2(GS) and15N 3 2/* (6.33 MeV) is discussed. It is shown that cross section differences for transitions to final states with different configurations are sensitive to a spin-orbit potential of15N. The strength and sign of the spin-orbit potential for15N is determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437995
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  • 16
    Electronic Resource
    Electronic Resource
    Thoughts on priorities in boundary-layer research (1983)
    Springer
    Boundary layer meteorology 25 (1983), S. 429-432 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041162
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  • 17
    Electronic Resource
    Electronic Resource
    Climatonomical modeling of temperature response to dust contamination of Antarctic snow surfaces (1977)
    Springer
    Boundary layer meteorology 12 (1977), S. 213-229 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Monthly averages of the surface energy balance are parameterized, resulting in a reduced solar forcing function and a non-dimensional time scale for computing the thermal response at the air/snow interface by numerical forward integration. The climatonomic transform of the balance equation serves to assess surface-temperature perturbations resulting from parameter modifications which simulate effects of dust contamination of a snow surface. Three climatonomical model experiments permit the following conclusions: (1) an albedo reduction increases primarily the summer temperatures; (2) an emissivity decrease raises the temperature of all months nearly uniformly; (3) the thermally induced feedback on submedium structure (if summer melting is instigated) increases the storage capacity and reduces spring and summer temperatures with compensating rise in autumn and winter temperature. Quantitative results are exemplified by assumed modification of conditions known to exist at the South Polar Plateau.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121974
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  • 18
    Electronic Resource
    Electronic Resource
    Comments on ‘An observational study of heat fluxes and their relationship with net radiation’, by D. Camuffo and A. Bernardi (1984)
    Springer
    Boundary layer meteorology 28 (1984), S. 193-198 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00119464
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  • 19
    Electronic Resource
    Electronic Resource
    Interaction of 80 MeV12C with88Sr; Neutron transfer, inelastic scattering and spin alignment of the 2+ State of12C (1982)
    Springer
    The European physical journal 305 (1982), S. 135-142 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a Q3D magnetic spectrometer the elastic and inelastic scattering of12C on88Sr and the neutron pick-up (12C,13C) has been studied. The spin alignment of the inelastically excited 2+ state of12C (4.43 MeV) has been deduced from the line shapes broadened by theγ-decay in flight. Thus for eachm-substate a full angular distribution was obtained. Them=1 substate shows a shifted interference minimum, which is explained by the different strength of the Coulomb and nuclear amplitudes in them-substates. The analysis of the data on elastic scattering, inelastic scattering, alignment and the neutron transfer can be described consistently with one choice of the optical model parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415021
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  • 20
    Electronic Resource
    Electronic Resource
    Inelastic scattering of20Ne and12C on58Ni and the three-body continuum (1985)
    Springer
    The European physical journal 320 (1985), S. 237-251 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using beams of20Ne at 291 and 392 MeV and12C at 300 MeV the inelastic excitation of collective modes in58Ni has been studied with a Q3D magnetic spectrometer. In the analysis different contributions are unfolded from the spectra:1. single lines,2. the inelastic continuum,3. the three-body continuum, which mainly originates from one-nucleon pick-up to unbound states followed by the nucleon emission. Special care was taken to calculate the spectral shape and strength of this process. The population of unbound21Ne-states is measured in a neutron-20Ne coincidence experiment. Coupled channel calculations have been performed to extract the deformation parameters for the inelastic states, including mutual excitation. For the giant quadrupole resonance 70 % of the energy weighted sum rule is found. The excitation of higher multipoles is calculated and extrapolated to higher incident energies (50 MeV/u). The importance of the in-elastic excitation as a “doorway process” to more complex interactions is discussed. It is found that especially the excitation of the projectile (20Ne) takes a large fraction (20–50 %) of the incoming flux in the first step.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01881271
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