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Arlt, U.; Bass, R.; Hartmann, V.; Renfordt, R.; Sapotta, K.; Fröbrich, P.; Schäfer, Wolfgang

doi:10.1103/physrevc.22.1790

Cited by 14 publications

(3 citation statements)

References 14 publications

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“…Coulomb breakup dominates at large distances, where the nuclear short-range interaction is negligible and the high angular-momentum partial waves participate, thus removing flux at corresponding forward angles. A similar phenomenon has been seen in the past (see for instance [17]) for heavy stable systems in which the Coulomb excitation is an important reaction channel. As we go to lighter targets the Coulomb interaction becomes less important and for very light systems the nuclear breakup dominates.…”

Section: Introductionsupporting

confidence: 83%

Four-body Effects in the 6He + 58Ni Scattering

Morcelle¹,

Rodríguez‐Gallardo²,

Lichtenthäler³

2018

Frontiers in Nuclear and Particle Physics

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We present angular distributions of the 6 He + 58 Ni scattering measured at three bombarding energies above the Coulomb barrier: E lab = 12.2 MeV, 16.5 MeV, and 21.7 MeV. The angular distributions have been analysed in terms of three-and four-body Continuum-Discretized Coupled-Channels calculations considering the effect of the 6 He breakup. A behaviour in the cross section at large angles has been observed which was reproduced only by the four-body Continuum-Discretized Coupled-Channels calculation.

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Section: Introductionsupporting

confidence: 83%

Four-body Effects in the 6He + 58Ni Scattering

Morcelle¹,

Rodríguez‐Gallardo²,

Lichtenthäler³

2018

Frontiers in Nuclear and Particle Physics

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“…Analysing powers measured in experiments with polarised beams were found to be even more sensitive to the coupling effects than the cross sections. In the 1980s many experiments with polarised 6,7 Li and 23 Na beams were performed at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany [17]. Later on these studies were moved to the Nuclear Structure Facility of the Daresbury Laboratory, U.K., and in the second part of the 1990s to the Florida State University, U.S.A.…”

Section: Strong Coupling Effects With Polarised Projectilesmentioning

confidence: 99%

Strong coupling effects in near-barrier heavy-ion elastic scattering

2014

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Abstract. Accurate elastic scattering angular distribution data measured at bombarding energies just above the Coulomb barrier have shapes that can markedly differ from or be the same as the expected classical Fresnel scattering pattern depending on the structure of the projectile, the target or both. Examples are given such as 18 O + 184 W and 16 O + 148,152 Sm, where the expected rise above Rutherford scattering due to Coulomb-nuclear interference is damped by coupling to the target excited states, and the extreme case of 11 Li scattering, where coupling to the 9 Li + n + n continuum leads to an elastic scattering shape that cannot be reproduced by any standard optical model parameter set. An early indication that the projectile structure can modify the elastic scattering angular distribution was the large vector analyzing powers observed in polarised 6 Li scattering. The recent availability of high-quality 6 He, 11 Li and 11 Be data provides further examples of the influence that coupling effects can have on elastic scattering. Conditions for strong projectile-target coupling effects are presented with special emphasis on the importance of the beam-target charge combination being large enough to bring about the strong coupling effects. Several measurements are proposed that can lead to further understanding of strong coupling effects by both inelastic excitation and nucleon transfer on near-barrier elastic scattering. A final note on the anomalous nature of 8 B elastic scattering is presented as it possesses a more or less normal Fresnel scattering shape whereas one would a priori not expect this due to the very low breakup threshold of 8 B. The special nature of 11 Li is presented as it is predicted that no matter how far above the Coulomb barrier the elastic scattering is measured, its shape will not appear as Fresnel like whereas the elastic scattering of all other loosely bound nuclei studied to date should eventually do so as the incident energy is increased, making both 8 B and 11 Li truly "exotic".

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“…In consideration of the mass-proportional distribution of the excitation energy, the latter assumption is expected to be valid up to a total thermal excitation energy of about 80 MeV. (3) The mean velocity of the fragments is not changed by the neutron emission.…”

Section: B Detectorsmentioning

confidence: 99%

Mass and charge transfer in the heavy ion reactionsNi208andNi
Sapotta
¹
,
Bass
²
,
Hartmann
³

et al. 1985
Phys. Rev. C
Self Cite
25
2
10
0
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Target-like reaction products corresponding to the transfer of one or several nucleons have been measured as a function of the total kinetic energy loss in the reactions Pb+' Ni (1215 MeV) and Pb+ Ni (1107 MeV) with a focusing time-of-flight spectrometer which provided a unique mass and charge separation and good energy resolution. The analysis of the experimental data covered the range from elastic scattering to deep-inelastic collisions. In the quasielastic region, neutron transfer dominates. The transfer probabilities as a function of the distance of closest approach can be described by a semiclassical theory of tunneling. Quasielastic transfer from the Ni targets to the 0 Pb projectile is strongly inhibited by the reaction Q values. For the intermediate and deepinelastic collisions, the mean values and variances of the mass and charge distributions as a function of the dissipated energy, as well as the correlations between neutron and proton transport, are discussed in a statistical diffusion theory. The important influence of the static potential energy surface on nucleon transport in the deep-inelastic region is demonstrated. Deviations from the simple diffusion model, observed at small to medium energy losses, are discussed.

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Elastic and inelastic scattering ofAr40fromPb

Cited by 14 publications

References 14 publications

Four-body Effects in the 6He + 58Ni Scattering

Four-body Effects in the 6He + 58Ni Scattering

Strong coupling effects in near-barrier heavy-ion elastic scattering

Mass and charge transfer in the heavy ion reactionsNi208andNi
Sapotta
¹
,
Bass
²
,
Hartmann
³

et al. 1985
Phys. Rev. C
Self Cite
25
2
10
0
View full text Add to dashboard Cite

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Elastic and inelastic scattering ofAr40fromPb

Cited by 14 publications

References 14 publications

Four-body Effects in the 6He + 58Ni Scattering

Four-body Effects in the 6He + 58Ni Scattering

Strong coupling effects in near-barrier heavy-ion elastic scattering

Mass and charge transfer in the heavy ion reactionsNi208andNiSapotta1, Bass2, Hartmann3 et al. 1985Phys. Rev. CSelf Cite252100View full textAdd to dashboardCite

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Mass and charge transfer in the heavy ion reactionsNi208andNi
Sapotta
¹
,
Bass
²
,
Hartmann
³

et al. 1985
Phys. Rev. C
Self Cite
25
2
10
0
View full text Add to dashboard Cite