Elastic and inelastic scattering of 0.8 GeV protons from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ne</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>20</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ne</mml:m

Blanpied, G. S.; Ritchie, Barry; Barlett, M. L.; Fergerson, R. W.; Hoffmann, G. W.; McGill, J.; Wildenthal, B. H.

doi:10.1103/physrevc.38.2180

Cited by 35 publications

(26 citation statements)

References 25 publications

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“…These were obtained by using the standard extended optical model prescriptions for the excitation mechanism and optical potential parameters given by a best fit to the elastic scattering data. The potential parameters and the deformation parameters required to obtain fits to the inelastic scattering are listed in Tables 1 and 5, values previously obtained by Blanpied et al (1984Blanpied et al ( , 1988. The dashed curves are the results obtained using the standard coupled channels approach [program ECIS88 was used (Raynal 1988)], based upon the SchrOdinger equation and by allowing coupling between the ot, 2t, 4t and 6t states.…”

Section: Resultsmentioning

confidence: 99%

“…But coupled channels calculations do not as yet account specifically for totally antisymmetrised state vectors, associated with which are exchange scattering amplitudes that are known to be important . For the transitions within 20Ne and induced by 800 MeV protons, recent analyses of the data (Blanpied et al 1988;Pham and de Swiniarski 1990) were made using such a coupled channels method, the most recent using Dirac phenomenology. Excellent fits to the data were obtained.…”

Section: Introductionmentioning

confidence: 99%

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Inelastic Scattering from 20Ne

Amos¹,

Berge²,

Steward³

et al. 1991

Aust. J. Phys.

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Inelastic scattering of 800 MeV protons exciting states of the ground state rotation band of 20Ne is studied using large basis space, microscopic model (Hartree-Fock) wavefunctions and free two-nucleon t-matrices, one of which is based upon the Paris interaction. Results are compared with coupled channels analyses of the data made using Dirac as well as Schrodinger phenomenology. Thereby it is suggested that coupled channels effects in the reaction mechanism are essential in analysis of such higher energy reaction data.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inelastic Scattering from 20Ne

Amos¹,

Berge²,

Steward³

et al. 1991

Aust. J. Phys.

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“…In our experiments we have focused on the 20 Ne projectile, since this nucleus has extremely large deformation parameters: β 2 = 0.46, β 3 = 0.39, β 4 = 0.27 [6][7][8] …”

Section: Introductionmentioning

confidence: 99%

“…In our experiments we have focused on the 20 Ne projectile, since this nucleus has extremely large deformation parameters: β 2 = 0.46, β 3 = 0.39, β 4 = 0.27 [6][7][8] In a series of experiments [11] with Zr isotopes we have proved that excitation of the non-collective states can give rise to a significant smoothing of the structure of the barrier height distribution D qe . The theoretical investigation of the influence of non-collective excitations on reaction dynamics in low-energy reactions, and in particular on quantum tunneling, may be found in [12,13].…”

mentioning

confidence: 99%

“…The best theoretical description of this observable can be made within the Coupled-Channels (CC) method where the interplay between various reaction channels is taken into account. In some cases in a distribution one observes a significant structure being a fingerprint of the couplings involved [4,5].In our experiments we have focused on the 20 Ne projectile, since this nucleus has extremely large deformation parameters: β 2 = 0.46, β 3 = 0.39, β 4 = 0.27 [6][7][8] …”

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confidence: 99%

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Barrier Height Distributions --- the Influence of Weak Channels

Trzcińska¹,

Piasecki²,

Czarnacki³

et al. 2014

Acta Phys. Pol. B

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Abstract.The barrier distributions for the 20 Ne+ 58,60,61 Ni systems were experimentally determined. In the 58 Ni case one observes a distinct "structure" in the distribution (two peaks) which is partially damped for 60 Ni and completely smoothed out for 61 Ni. It seems that smoothing is caused by non-collective excitations of the target nuclei.It has been demonstrated experimentally in many systems that the fusion barrier between two nuclei does not have a unique value but rather a weighted distribution of heights, D f us . Measurements of barrier distributions are a long-term project of our group. D f us can be determined directly from fusion excitation function measurements [1]. There is also an alternative method: it has been shown both theoretically and experimentally that the rather difficult fusion measurements can be replaced by much simpler quasi-elastic scattering measurements at backwards angles, giving rise to the barrier height distribution D qe . The basic equivalence of these two methods is confirmed by many existing data sets [2,3].Studies of fusion cross-section at sub-barrier energies show that there is a relation between the reaction mechanism and the structure of the interacting nuclei reflected in the shape of the barrier height distribution. The best theoretical description of this observable can be made within the Coupled-Channels (CC) method where the interplay between various reaction channels is taken into account. In some cases in a distribution one observes a significant structure being a fingerprint of the couplings involved [4,5].In our experiments we have focused on the 20 Ne projectile, since this nucleus has extremely large deformation parameters: β 2 = 0.46, β 3 = 0.39, β 4 = 0.27 [6][7][8]

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Evidence for a real tensor potential in the inelastic scattering of 800 mev polarized protons from20ne using the dirac phenomenology

Pham

Swiniarski

1990

Z. Physik A - Atomic Nuclei

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Coupled-channel calculations using the Dirac phenomenology have been performed to analyze cross-sections and analyzing powers data for inelastic scattering of 800 MeV polarized protons from low-lying states in g~ Good agreement with the data has been obtained by using a real tensor potential V~ = 27.02 MeV, in addition to real scalar potential and complex vector potential. Deformation parameters obtained at this energy of 800 MeV are very close to those obtained at an energy much lower (24.5 MeV). Once more, considerable improvements obtained by using Dirac equation, compared to Schr6dinger calculations, are confirmed. The calculations are also consistent with V~ ~= 0.

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Elastic and inelastic scattering of 0.8 GeV protons fromNe20andNe

Cited by 35 publications

References 25 publications

Inelastic Scattering from 20Ne

Inelastic Scattering from 20Ne

Barrier Height Distributions --- the Influence of Weak Channels

Evidence for a real tensor potential in the inelastic scattering of 800 mev polarized protons from20ne using the dirac phenomenology

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