A new phenomenological – interaction

Heiberg-Andersen, H.; Mackintosh, R. S.; Vaagen, J. S.

doi:10.1016/s0375-9474(02)01291-5

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…Inversion of the corresponding S-matrix invariably leads to a paritydependent imaginary potential as a consequence of Perey-like effects due to the non-locality of the real potential. These effects are surveyed in the appendix of [123]. The last paper presents a phenomenological confirmation of the general parity-dependent character of the 3 He+ 4 He interaction found by inverting RGM S-matrices.…”

Section: Resonating Group Methods S-matrixmentioning

confidence: 58%

The application of inversion to nuclear scattering

Kukulin

Mackintosh

2004

J. Phys. G: Nucl. Part. Phys.

141

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We review the application of inverse scattering in nuclear physics. We emphasize the various ways in which inversion can be used to understand nuclear interactions, and survey the results that have been obtained. We discuss S → V inversion from both theoretical and experimentally fitted S-matrices as well as a new method for direct observable →V inversion. The various alternative approaches to inverse scattering are briefly reviewed, and their range of applicability is discussed. This is not a review of formal inversion methods, but the iterative perturbative (IP) approach is described in some detail together with a discussion of the physics results which have been obtained using it and other inversion methods. The case of p+4He scattering is presented in some detail as a case study exemplifying the kind of information which can now be obtained by the application of inverse scattering techniques. It also brings out the comparative properties of different inversion methods.

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Section: Resonating Group Methods S-matrixmentioning

confidence: 58%

The application of inversion to nuclear scattering

Kukulin

Mackintosh

2004

J. Phys. G: Nucl. Part. Phys.

141

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“…[68] found that Majorana terms were important for p+ 16 4 He, see Ref. [109]. The parity dependence of the interaction for 4 He scattering from 12 C [110] has been established by inverting S l precisely fitted to data over a range of energies.…”

Section: G Evidence For Parity Dependence From Fits To Datamentioning

confidence: 99%

“…Parity dependence has been firmly established by fitting experimental data for nucleon scattering from 4 He [107] and 16 O [108] and for 3 He scattering from 4 He, see Ref. [109]. The parity dependence of the interaction for 4 He scattering from 12 C [110] has been established by inverting S l precisely fitted to data over a range of energies.…”

Section: G Evidence For Parity Dependence From Fits To Datamentioning

confidence: 99%

The angular momentum dependence of nuclear optical potentials

Mackintosh

2019

Eur. Phys. J. A

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The nuclear optical model potential (OMP) is generally assumed to be independent of the orbital angular momentum, l, of the interacting nuclei. Nucleon-nucleus and nucleus-nucleus interactions are customarily l independent in calculations of nuclear elastic scattering and in standard reaction codes. The evidence for various forms of l dependence of OMPs is reviewed and the importance of implementing these forms is evaluated. Existing arguments and evidence for l dependence are reviewed and new arguments and calculations are introduced. The relationship is examined between (i) l dependence, and, (ii) the undularity (waviness) of l-independent potentials that are S-matrix equivalent to l-dependent potentials. Such undularity is a property of the dynamic polarisation potential (DPP) generated by the coupling to reaction channels, or by coupling to excited states of the target or projectile nuclei. Various examples, particularly involving weakly bound projectile nuclei, are presented. Such undularity also occurs in l-independent potentials that have been found in model independent fits to precise wide angular range elastic scattering angular distributions.Cases of such phenomenological undularity, for both light and heavy ions, are referenced and shown to be related to undulatory properties of the dynamic polarisation potentials (DPPs) arising from channel coupling. Other forms of l dependence, that could be standard options in direct reaction codes, are noted. Of particular importance are l dependencies arising from full antisymmetrization.The case is made that reaction-induced l dependence is a general property of nucleon-nucleus and nucleus-nucleus interactions and represents a valid extension of the nuclear optical model.

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The p+6He interaction from Ec.m.=0.5 to 25 MeV

Mackintosh

2004

Nuclear Physics A

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A new phenomenological – interaction

Cited by 3 publications

References 23 publications

The application of inversion to nuclear scattering

The application of inversion to nuclear scattering

The angular momentum dependence of nuclear optical potentials

The p+6He interaction from Ec.m.=0.5 to 25 MeV

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