Analysis of the Inelastic Scattering of Alpha Particles. I

Bassel, R.H.; Satchler, G.R.; Drisko, R.M.; Rost, E.

doi:10.1103/physrev.128.2693

Cited by 273 publications

(32 citation statements)

References 22 publications

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“…Calculations for the inelastic scattering were performed with the code Julie [20], describing the excitation within the collective model by a deformed optical potential. The extracted deformation parameters are similar to the values obtained from other heavy ion experiments, they depend, however, strongly on the optical model parameters ( Table 3).…”

Section: Inelastic Scattering At Forward Anglesmentioning

confidence: 99%

Elastic and inelastic scattering of16O by12C at forward and backward angles

et al. 1973

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Angular distributions of the reactions 12C(160, 160)12C and lZC(160, 12C)160 have been measured in the angular range OfOcM=lO~ ~ at 65 and 80 MeV to ground states and excited states of both final nuclei. An optical model with/-dependent imaginary potential gives no consistent description of the elastic scattering data. It is shown, however, that the forward angle elastic scattering may be described by strongly absorbing potentials and that the backward rise of the cross sections in both the elastic and inelastic transitions can be explained by a four nucleon transfer 12C(160, 12C)160,

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Section: Inelastic Scattering At Forward Anglesmentioning

confidence: 99%

Elastic and inelastic scattering of16O by12C at forward and backward angles

et al. 1973

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“…This effect is well established in inelastic nucleon scattering for normal parity transitions throughout the periodic table and treated as corepolarization mechanism [6]. It results in a renormalization of the two body t-matrix.…”

Section: Introductionmentioning

confidence: 91%

Excitation of giant multipole resonancesL=1,2 and 3 in the16O(p,2p) reaction

Geramb

Eppel

1973

Z. Physik

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The 160(p, 2p) quasi elastic reaction at 45 MeV is investigated in the framework of the antisymmetrized distorted wave approximation (DWA). The inclusion of a direct and exchange two step core polarization mechanism, virtually exciting giant multipole resonances was consistently applied as in the (p,p') non normal parity transition of 160. Thus utilizing the same renormalized effective two nucleon t-matrix as in the inelastic transition a good fit to the data was obtained. It is suggested by the present analyses that corepolarization must be fully included for (p, 2p) like for inelastic scattering in the intermediate energy range.

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“…(69) it has been assumed that p and h are distinct from any of the + particle or hole states contained in Z J M (n)~ i.e. we neglect the a2 2 2 Pauli principle in intermediate states.…”

Section: Explicit Expressions For Matrix Elements Of Fmentioning

confidence: 99%

Core polarization in inelastic scattering

et al. 1977

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LBL-1951Inelastic scattering is a source of much useful information about core polarization effects in nuclei near closed shells. Although there have been many theoretical treatments of core polarization effects reported in the literature, the results of these calculations have rarely been applied to the interpretation of inelastic scattering data. In the present paper we review the microscopic models for the treatment of inelastic proton and electron scattering and the microscopic models for the treatment of core polarization.Estimates are made of core excited admixtures in the wave functions for low-1 . t t . 42c 50T. 89y 90z 207Pb and 209B 1 .• · y1.ng s a es 1.n a, 1. , , r, , The resulting wave functions are used to calculate theoretical (p,p') cross sections and (e,e') form factors for comparison with available experimental data. "Realistic" G matrix interactions are used as the starting point in both the structure and the (p,p') calculations. In the structure calculations the interaction is modified by means of a "bootstrap" prescription to account for important long-range core correlations and in the (p,p') calculations it is modified by the addition of an imaginary component. It is concluded that the overall features of the experimental data can be understood from these calculations. The concept of core polarization is quite well known in the shell model interpretation of nuclei in the vicinity of closed shells. In the shell model _, a nuclear state is described in a restricted configuration space which presumably contains the bulk of its wave function, but not all its significant components.This restricted configuration space, commonly called the model space, usuallyconsists of a few valence p,articles (holes) distributed among a small number of shell model orbitals outside (inside) an inert closed shell core. The term core polarization is generally associated with effects which are due to wave function admixtures not in the model space. The name arises because these admixtures most often will consist of core-excited configurations. Core polarization can be taken into account by defining effective operators in the model space which may be calculated by means of perturbation theory. 2These ideas first appeared in the literature about twenty years ago 'when it was first noted that there were discrepancies between the predictions of the simple shell model and the experimental values for nuclear magnetic moments, quadrupole moments, y-transition rates, etc. Two different models were proposed at this time. One is a hybrid model in which the core is treated as a liquid drop which can be set into oscillation by interaction with the extra-core nucleons. 1 The other is a completely microscopic model 2 in which the core is considered to be an assemblage of nucleons -any of which might be raised to higher, unoccupied levels as a result of the two body forces which couple them to the valence nucleons.In recent times this microscopic model has been pursued in considerably greater depth. The major impetus ...

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Analysis of the Inelastic Scattering of Alpha Particles. I

Cited by 273 publications

References 22 publications

Elastic and inelastic scattering of16O by12C at forward and backward angles

Elastic and inelastic scattering of16O by12C at forward and backward angles

Excitation of giant multipole resonancesL=1,2 and 3 in the16O(p,2p) reaction

Core polarization in inelastic scattering

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