Role of channel coupling and deuteron-exchange mechanisms in anomalous alpha-particle scattering on 6Li

Sakuta, S.B.; Artemov, S. V.; Burtebaev, N.; Kerimkulov, Zh.; Novatsky, B. G.; Stepanov, D. N.; Yarmukhamedov, R.

doi:10.1134/s1063778809120023

Cited by 6 publications

(10 citation statements)

References 23 publications

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“…Figure 5 shows that the theoretical cross sections reproduce the structureless character of the experimental angular distributions and their energy dependence, but, in just the same way as in the case of the other calculations performed in [10,14,18], they do not describe the observed decrease in the cross sections in the region of angles larger than θ ∼ 140 • . The value obtained from our analysis for the average quadrupole-deformation length, δ 2 = 2.2 fm, corresponds to the reduced electromagnetic-transition probability of B(E2) = 36.3e 2 fm 4 , which is in reasonable agreement with the value known from electron scattering, B(E2) = 25.6e 2 fm 4 [19], and with data from an analysis of deuteron [14] and alphaparticle [26] scattering.…”

Section: Analysis Of Experimental Datasupporting

confidence: 86%

“…8) was deduced. These results and open triangles standing for data from our present study and [18], respectively) and α + 6 Li (open circles standing for data from [26]) systems versus energy per nucleon (E/A). Approximated energy dependences of the volume integrals JV for the p + 6 Li [32], d + 6 Li [1], and 12 C + 12 C [33] systems are represented by, respectively, the solid, dash-dotted, and dashed curves.…”

Section: Optical Potentialsmentioning

confidence: 55%

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Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

et al. 2012

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Existing experimental data on elastic and inelastic deuteron scattering on 6 Li nuclei in the energy range from 8 to 50 MeV were analyzed within the approach of coupled reaction channels. The coupling of elastic scattering and inelastic scattering accompanied by the transition to the 3 + state at E x = 2.186 MeV and the mechanism involving the exchange of an alpha-particle cluster were taken into account in respective calculations. The phenomenological potentials obtained from the present analysis describe well experimental angular distributions at all energies and in full angular ranges. The depths of the real and imaginary parts of the potentials in question depend smoothly on energy at fixed values of the remaining parameters. The energy dependence of relevant volume integrals agrees well with similar data for the p + 6 Li, α + 6 Li, and 12 C + 12 C systems and with the predictions of a microscopic theory.

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Section: Analysis Of Experimental Datasupporting

confidence: 86%

Section: Optical Potentialsmentioning

confidence: 55%

Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

et al. 2012

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“…The systematics of the proton and α-particles scattering by light nuclei at an energy of about 10 MeV/nucleon showed an anomalous growth of cross sections at the large angles. It was shown [1][2][3][4][5], that other mechanism, such as exchange processes, make a significant contribution to the formation of a scattering cross section in this energy region.…”

Section: Introductionmentioning

confidence: 99%

“…At present, scattering of α-particles by 6 Li and 7 Li nuclei, having a pronounced cluster structure, was systematically studied. The anomalous large-angle scattering (ALAS), observed in [1][2][3][4], can be only described with taking into account the contribution of the cluster exchange mechanism, which is physically indistinguishable from potential scattering. Therefore, in a number of papers [4,6], with taking into account this mechanism, it was possible not only to obtain more reliable parameters of the optical potentials, but also to extract the values of cluster spectroscopic factors from the cross sections analysis at large angles.…”

Section: Introductionmentioning

confidence: 99%

“…The anomalous large-angle scattering (ALAS), observed in [1][2][3][4], can be only described with taking into account the contribution of the cluster exchange mechanism, which is physically indistinguishable from potential scattering. Therefore, in a number of papers [4,6], with taking into account this mechanism, it was possible not only to obtain more reliable parameters of the optical potentials, but also to extract the values of cluster spectroscopic factors from the cross sections analysis at large angles. In particular, the values of the spectroscopic factors were obtained for the configurations d +, 3 He + t and t + , and not only for the ground, but also for the excited states of the 6,7 Li nuclei from the analysis of the scattering of 3 He and  -particles.…”

Section: Introductionmentioning

confidence: 99%

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INVESTIGATION OF DEUTERON SCATTERING BY 7 Li NUCLEI AT ENERGY OF 14.5 MeV

Nassurlla

Burtebayev²,

Kerimkulov³

et al. 2018

Physico-Mathematical Series

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The pronounced cluster structure of lithium isotopes is an excellent test for verification the various theoretical nuclear models. The study of the cluster exchange mechanism in direct nuclear reactions opens new possibilities in determining the structures of these nuclei. The sets of parameters of optical potentials available in the literature are vary, that can lead to ambiguity in determining the cluster spectroscopic factors of the studied nuclei. Therefore, an experimental study of the scattering process at energy E = 14.5 MeV has been carried out in order to obtain an independent global systematic of optical potentials for the d + 7 Li system. New experimental data were obtained in the current paper on the elastic and inelastic scattering of deuterons on 7 Li nuclei at energy E = 14.5 MeV. In addition to this, in our analysis we used experimental data on elastic scattering, measured previously at deuteron energies from 7 to 28 MeV. The analysis of the differential cross sections was performed within the framework of the optical model. The optimal parameters of optical potentials for the studied nucleus are established. The obtained parameters in this work will be used in the analysis of the data on inelastic scattering of deuterons and the 7 Li (d, t) reaction to refine the structural characteristics of lithium isotopes.

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Spectroscopic information of ⁶Li from elastic scattering of deuterons, ³He and ⁴He by ⁶Li

Amar

2014

Int. J. Mod. Phys. E

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The elastic scattering of deuterons, 3 He and 4 He on 6 Li at different incident energies have been analyzed in the framework of the optical model (OM) using ECIS88 as well as SPI GENOA codes. The optical potential parameters were extracted in the phenomenological treatment. A good agreement between theoretical and experimental differential cross-sections was obtained in whole angular range. Parameters for real part of potential have been also calculated microscopically with double-folding model for the d, 3 He and 4 He scattering, respectively, using DFPOT code. The elastic transfer mechanism has been studied by coupled reaction channel (CRC) method using FRESCO code. Spectroscopic amplitudes of 6 Li ≡ t + 3 He and 6 Li ≡ α + d configurations have been extracted from d, 3 He and 4 He scattering on 6 Li at wide energy range. A comparison between spectroscopic amplitudes obtained from deuteron and α elastically scattering from 6 Li has been made. The extracted spectroscopic amplitudes of 6 Li ≡ 4 He + d( SF = SA 2) from 6 Li (d, 6 Li )d and 6 Li (α, 6 Li )α are not the same as expected theoretically.

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Role of channel coupling and deuteron-exchange mechanisms in anomalous alpha-particle scattering on 6Li

Cited by 6 publications

References 23 publications

Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

INVESTIGATION OF DEUTERON SCATTERING BY 7 Li NUCLEI AT ENERGY OF 14.5 MeV

Spectroscopic information of ⁶Li from elastic scattering of deuterons, ³He and ⁴He by ⁶Li

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Role of channel coupling and deuteron-exchange mechanisms in anomalous alpha-particle scattering on 6Li

Cited by 6 publications

References 23 publications

Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

Channel coupling and exchange of an alpha-particle cluster in deuteron scattering on 6Li nuclei

INVESTIGATION OF DEUTERON SCATTERING BY 7 Li NUCLEI AT ENERGY OF 14.5 MeV

Spectroscopic information of 6Li from elastic scattering of deuterons, 3He and 4He by 6Li

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Spectroscopic information of ⁶Li from elastic scattering of deuterons, ³He and ⁴He by ⁶Li