Deuteron-deuteron elastic scattering at 231.8 MeV

Micherdzińska, A.; Pancella, P. V.; Stephenson, E.J.; Bacher, A.D.; Allgower, C.; Fonseca, A. C.; Lavelle, C. M.; Nann, H.; Olmsted, J.; Pickar, M. A.; Smith, A. J. S.

doi:10.1103/physrevc.75.054001

Cited by 22 publications

(52 citation statements)

References 31 publications

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“…This simplification is expected to be reasonable only at higher energies. Similar approximation was already used to calculate d-d elastic scattering at 230 MeV [29]. In the calculations three different 2N potentials were used: AV18 [18], CD Bonn [17] and CD Bonn+∆ [20].…”

Section: Introductionmentioning

confidence: 99%

“…The recent SSA calculations for the elastic scattering [25] use more refined NN potentials [17,18,20] and take into account more partial waves than in the previous calculations [29], therefore the 4N results are well converged. Moreover, the interaction part was improved by adding external Coulomb correction to the elastic scattering amplitude.…”

Section: Introductionmentioning

confidence: 99%

“…For these reactions only few data sets exist at intermediate energies (50-230 MeV) [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the cross section for dd elastic scattering and dd→nHe3

et al. 2019

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Differential cross sections of 2 H(d,d)d elastic scattering and proton transfer 2 H(d, 3 He)n reactions at 160 MeV beam energy have been obtained. They have been normalized relative to the existing cross-section data for the 2 H(d,d)d elastic scattering at 180 and 130 MeV, benefitting from the negligible energy dependence of this observable at certain range of the four momentum transfer. The experiment was performed at KVI in Groningen, the Netherlands using the BINA detector. The elastic scattering data are compared to theoretical predictions based on the lowest-order term in the Neumann series expansion for four-nucleon transition operators. The calculations underpredict the data. The data presented in this paper can be used to validate the future theoretical findings.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the cross section for dd elastic scattering and dd→nHe3

et al. 2019

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“…At these low energies, the calculations are very reliable, but the effect of many-body forces is very small and hard to measure. Above the break-up thresholds and below the pion-production threshold, namely at intermediate energies, the 4N database becomes even more scarce [16,17,18,19,20,21,22]. To enrich the experimental database in few-body systems, various scattering experiments were carried out at Kernfysisch Versneller Instituut (KVI), including a study of the deuterondeuteron elastic and inelastic scattering processes.…”

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confidence: 99%

Investigation of the quasi-free domain in deuteron-deuteron break-up using spin observables

et al. 2019

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Precision measurements of vector and tensor analyzing powers of the 2 H(d, dp)n break-up process for configurations in the vicinity of the quasi-free scattering regime with the neutron as spectator, are presented. These measurements are performed with a polarized deuteron-beam with an energy of 65 MeV/nucleon impinging on a liquid-deuterium target. The experiment was conducted at the AGOR facility at KVI using the BINA 4π-detection system. Events for which the final-state deuteron and proton are coplanar have been analyzed and the data have been sorted for various momenta of the missing neutron. In the limit of vanishing neutron momentum and at large deuteron-proton momentum transfer, the data agree well with the measured and theoretically predicted spin observables of the elastic deuteronproton scattering process. The agreement deteriorates rapidly with increasing neutron momentum and/or decreasing momentum transfer from the deuteron beam to the outgoing proton. This study reveals the presence of a significant contribution of final-state interactions even at very small neutron momenta.

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“…Expecting next milestone in theory -the ab-initio calculations for 4-nucleon systems at intermediate energies -experimental studies of such systems are carried out. The data base at intermediate energies is gradually created in the domain of elastic scattering at deuteron energies of 241 MeV [50] and 135 MeV [51] and the breakup reaction at 135 MeV [52] and 160 MeV. So far, the comparison of quasi-free scattering in the d(d,pd)n breakup (with neutron as a spectator) with the elastic dp scattering can be performed [52], while rich data sets are collected as the testing ground for future calculations.…”

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confidence: 99%

Experimental Studies of Few-nucleon Systems at Intermediate Energies

2014

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Systems composed of 3 nucleons are a subject of precise experimental studies for many years. At the first stage the investigations were mainly focused on elastic nucleon-deuteron scattering, slowly extending to systematic measurements of the deuteron breakup reaction. Intermediate energies, below the threshold for pion production, deserve special attention: it is the region where comparison with exact theoretical calculations is possible, while the sensitivity to various aspects of interaction, like subtle effects of the dynamics beyond the pairwise nucleon-nucleon force, is significant. Moreover, the Coulomb interaction and relativistic effects show their influence in the observables of the breakup reaction. All these effects vary with energy and appear with different strength in certain observables and phase space regions, what calls for systematic investigations of a possibly rich set of observables determined in a wide range of energies. The next step in complication of the system are studies of reactions involving 4 nucleons-more sensitive, as expected, to subtle dynamics beyond the pairwise interaction. A brief survey of recent and planned experiments in the 3-and 4-nucleon systems is given.An important, and even basic step on the way to understand properties of nuclei and reactions involving nucleons and nuclei would be to create an exact model of nuclear forces. Even though from the QCD point of view nuclear forces are given as residual interaction between hadrons, successful calculations in the energy region of stable nuclei can be performed with just nuclear and pionic degrees of freedom. At present, there are generally two approaches to the construction of nucleon-nucleon potential: realistic potentials, which are semi-phenomenological models based on meson-exchange picture (see [1] for review), and effective field theories based on spontanously broken chiral symmetry (see [2,3] and references therein). They both provide an accurate description of the very large N N scattering data base below the pion production threshold. The modern potentials were tuned to these large data sets by means of PWA [4,5] and, as a result, the structure of the nuclear force in terms of angular momenta has been established. The nucleon-nucleon potential is undoubtedly a leading part of the nuclear interaction and should be sufficient to describe basic properties of nuclei and main trends in observables for systems of few (and many) nucleons, if only exact calculations are feasible. However, since an internal structure of nucleons is neglected, the question arises, how the suppressed degrees of freedom influence observables in any system consisting of more than 2 nucleons. Such additional dynamics, called

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Deuteron-deuteron elastic scattering at 231.8 MeV

Cited by 22 publications

References 31 publications

Investigation of the cross section for dd elastic scattering and dd→nHe3

Investigation of the cross section for dd elastic scattering and dd→nHe3

Investigation of the quasi-free domain in deuteron-deuteron break-up using spin observables

Experimental Studies of Few-nucleon Systems at Intermediate Energies

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