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Mass measurement and spectroscopy of57Cu with the58Ni(14N,15C)-reaction (1987)

Stiliaris, E. ; Bohlen, H. G. ; Chen, X. S. ; [weitere]

Springer

The European physical journal 326 (1987), S. 139-146

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ISSN: 1434-601X

Schlagwort(e): 21.10.Dr ; 25.70.Cd ; 27.40.+ z

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The mass of57Cu has been measured with the58Ni(14N,15C)-reaction at 150 MeV incident energy with theQ 3D-spectrometer. The reaction has been selected after a careful inspection of the DWBA-expression for the cross section with respect to the highest weighting factors for spins andl-transfer. Cross sections of several μb/sr have been obtained. TheQ-value has been measured to beQ 0=−19.90 (4) MeV and the57Cu mass excess is −47 340 (40) keV. Four lines of excited states have been observed up to 5.7 MeV. These states have a structure of single particle character, since57Cu consists of a doubly closed core with N=Z=28 and a proton outside, and states up to the 2d 5-shell are observed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01283588

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Digitale Medien

Refractive scattering and the nuclear rainbow in the interaction of12, 13C with12C at 20MeV/N (1985)

Bohlen, H. G. ; Chen, X. S. ; Cramer, J. G. ; [weitere]

Springer

The European physical journal 322 (1985), S. 241-261

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ISSN: 1434-601X

Schlagwort(e): 24.10.−i ; 25.70.Cd

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01411889

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Spectroscopy of9He with the (13C,13O)-reaction on9Be (1988)

Bohlen, H. G. ; Gebauer, B. ; Kolbert, D. ; [weitere]

Springer

The European physical journal 330 (1988), S. 227-228

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ISSN: 1434-601X

Schlagwort(e): 21.10.Dr ; 25.70.Cd ; 27.20.+n

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract First results of the double-charge-exchange reaction9Be(13C,13O)9He, ELab=380 MeV, are presented. The ground state and an excited state at 3.8 MeV are clearly seen. A preliminary value of the9He mass excess is obtained: 41.5±0.6 MeV. Spectra of of the9Be(13C,14O) He-reaction have been measured with high resolution. The ground state transition appears as a pronounced sharp peak, but no other narrow peaks are observed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01293402

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