Analysis of proton<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>+</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts /><mml:none /><mml:mn>12</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>scattering by microscopic coupled-channels calculations

Tomita, Mitsuhiro; Iwasaki, Masataka; Otani, R.; Horio, K.; Itô, Makoto

doi:10.1103/physrevc.92.024609

Cited by 7 publications

(39 citation statements)

References 26 publications

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“…1 [7]. In all the energy ranges, the theoretical calculations reasonably reproduce the global features of the observed cross sections.…”

Section: Differential Cross Sectionssupporting

confidence: 60%

“…(3) and (4). The left and right panels in figure 1 show the results of the differential cross sections of the elastic (0 + 1 ) and 0 + 2 channels, respectively [7]. states, which are the member of the rotational and vibrational excited states from the ground state, respectively, in the same energy range [7].…”

Section: Differential Cross Sectionsmentioning

confidence: 99%

“…The channel coupling effect on the 0 + 2 channel is analyzed [7]. The direct coupling of 0 + 1 → 0 + 2 is quite weak because the intrinsic structures are very different with each other.…”

Section: Differential Cross Sectionsmentioning

confidence: 99%

“…In this report, the method of the scattering radius is extended to the multi-channel problem in the p + 12 C scattering, going to the various inelastic channels that contain the collective excitations of the 2 + 1 and 3 − 1 states and the 3α excitations of the 0 + 2 and 2 + 2 states [7]. In the recent studies on 12 C, the revised structure calculation has been performed, and the matter radius of the 3α states has been reinvestigated [3].…”

Section: Introductionmentioning

confidence: 99%

“…In our coupled-channel calculations, which is called the microscopic coupled-channel (MCC) calculation [6,7,13,14], the nuclear interactions of p + 12 C are constructed in the full microscopic manner, the folding model. In MCC, we use the internal wave function of 12 C calculated from the 3α resonating group method (RGM) [2], while the density-dependent version of the Michigan 3 range Yukawa (DDM3Y) interaction [15][16][17] are employed for the effective NN interaction.…”

Section: Introductionmentioning

confidence: 99%

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Spatial measure of reaction size in proton scattering

Itô

Iwasaki

Otani

et al. 2016

EPJ Web of Conferences

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Abstract. The microscopic coupled-channel (MCC) calculations for proton + 12 C inelastic scattering are performed in the energy range of E p = 29.95 MeV to 65 MeV. The nuclear interactions for the proton − 12 C system are constructed from the folding model, which employs the internal wave function of 12 C, obtained from the 3α resonating group method (3α RGM), and an effective nucleon-nucleon interaction of the density-dependent Michigan three-range Yukawa (DDM3Y). The MCC calculation with the 3α RGM + DDM3Y nicely reproduces all of the differential cross sections for elastic and inelastic scattering in the angular range of θ c.m. = 30 • to 120 • . We introduce a scattering radius, which characterizes a spatial size of the scattering area, from partial wave decompositions of an angle-integrated cross section. The scattering radii for the elastic scattering and the various inelastic channels, which involve the rotational or vibrational excitations and the 3α excitations in 12 C, are derived. We found that the scattering radii for the inelastic channels with a well developed 3α structure are strongly enhanced in comparison to the scattering radii for the elastic and collective channels. This enhancement of the scattering radius for the 3α channel strongly suggests that the scattering radius is sensitive to a size of the intrinsic structure of the finally excited state in the scattering process.

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“…1 [7]. In all the energy ranges, the theoretical calculations reasonably reproduce the global features of the observed cross sections.…”

Section: Differential Cross Sectionssupporting

confidence: 60%

Section: Differential Cross Sectionsmentioning

confidence: 99%

“…The channel coupling effect on the 0 + 2 channel is analyzed [7]. The direct coupling of 0 + 1 → 0 + 2 is quite weak because the intrinsic structures are very different with each other.…”

Section: Differential Cross Sectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial measure of reaction size in proton scattering

Itô

Iwasaki

Otani

et al. 2016

EPJ Web of Conferences

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Symmetry energy III: Isovector skins

2017

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Isoscalar density is a sum of neutron and proton densities and isovector is a normalized difference.Here, we report on the experimental evidence for the displacement of the isovector and isoscalar surfaces in nuclei, by ∼0.9 fm from each other. We analyze data on quasielastic (QE) charge exchange (p,n) reactions, concurrently with proton and neutron elastic scattering data for the same target nuclei, following the concepts of the isoscalar and isovector potentials combined into Lane optical potential. The elastic data largely probe the geometry of the isoscalar potential and the (p,n) data largely probe a relation between the geometries of the isovector and isoscalar potentials.The targets include 48 Ca, 90 Zr, 120 Sn and 208 Pb and projectile incident energy values span the range of (10-50) MeV. In our fit to elastic and QE charge-exchange data, we allow the values of isoscalar and isovector radii, diffusivities and overall potential normalizations to float away from those in the popular Koning and Delaroche parametrization. We find that the best-fit isovector radii are consistently larger than isoscalar and the best-fit isovector surfaces are steeper. Upon identifying the displacement of the potential surfaces with the displacement of the surfaces for the densities in the Skyrme-Hartree-Fock calculations, and by supplementing the results with those from analysing excitation energies to isobaric analog states in the past, we arrive at the slope and value of the symmetry energy at normal density of 70 < L < 101 MeV and 33.5 < a V a < 36.4 MeV, respectively.

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