Elastic transfer and parity dependence of the nucleus-nucleus optical potential

Phuc, Nguyen Tri Toan; Mackintosh, R. S.; Phuc, Nguyen Hoang; Khoa, Dao T.

doi:10.1103/physrevc.100.054615

Cited by 10 publications

(11 citation statements)

References 92 publications

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“…The results of the IP inversion were obtained with high precision and a strong Majorana term has been deduced for the total OP of the 16 O + 12 C system, which is a direct estimation of the -dependent contribution by the core exchange or α transfer. It is of interest for the present study to compare the best-fit Majorana potential (7) with the imaginary part of the inverted Majorana potential [44], and results plotted in Fig. 7 show indeed that the dynamic polarization of the OP by the core exchange or elastic α transfer can be effectively taken into account by the -dependent potential in the Gaussian form (7) suggested by Frahn and Hussein [29].…”

Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 74%

“…where W M (R) is often discussed as the Majorana potential [44], which accounts for the core-core symmetry of a light HI system like 16 O + 12 C . The best OM fit to the elastic 16 O + 12 C data at E lab = 115.9 and 132 MeV over the whole angular range Fig.…”

Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 99%

“…The S-matrix given by the twochannel CRC calculation is shown as dash-dotted line Fig. 7 Imaginary part of the Majorana potential deduced by the IP inversion method [44,45] from the S matrix given by the two-channel CRC calculation of the elastic 16 O + 12 C scattering at 132 MeV (solid line), in comparison with that of the best-fit Majorana potential (dahsed line) parametrized in the Gaussian form (7) suggested by Frahn and Hussein [29] [44] to give rise to the parity dependence of the OP. Namely, the S-matrix generated by the CRC calculation of elastic 16 O + 12 C scattering [32] was used as the input for the iterative-perturbative (IP) inversion method [45] to obtain the effective local OP that contains both the ( -independent) Wigner and ( -dependent) Majorana terms.…”

Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 99%

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Elastic $$\alpha $$ transfer in the $$^{16}\hbox {O}+^{12}\hbox {C}$$ scattering and its impact on the nuclear rainbow

2021

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Elastic 16 O + 12 C scattering is known to exhibit the nuclear rainbow pattern at incident energies E lab 200 MeV, with the Airy structure of the far-side scattering cross section clearly seen at medium and large angles. Such a rainbow pattern is well described by the deep real optical potential (OP) given by the double-folding model (DFM). At lower energies, the extensive elastic 16 O + 12 C scattering data show consistently that the nuclear rainbow pattern at backward angles is deteriorated by an oscillating enhancement of elastic cross section that is difficult to describe in the conventional optical model (OM). Given a significant α spectroscopic factor predicted for the dissociation 16 O→ α+ 12 C by the shell model and α-cluster models, the contribution of the elastic α transfer (or the core-core exchange) to the elastic 16 O + 12 C scattering should not be negligible and is expected to account for the enhanced elastic cross section at backward angles. To reveal the impact of the elastic α transfer, a systematic coupled reaction channels analysis of the elastic 16 O + 12 C scattering has been performed, with the coupling between the elastic scattering and elastic α transfer channels treated explicitly, using the real OP given by the DFM. We found that the elastic α transfer enhances the near-side scattering significantly at backward angles, giving rise to an oscillating distortion of the smooth Airy structure. The dynamic polarization of the OP by the coupling between the elastic scattering and elastic α transfer channels can be effectively taken into account in the OM calculation by an angular-momentum (or parity) dependent potential added to the imaginary OP, as suggested by Frahn and Hussein 40 years ago.

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Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 74%

Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 99%

Section: Crc Description Of the Elastic α Transfer 12 C ( 16 O 12 C) 16 Omentioning

confidence: 99%

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Elastic $$\alpha $$ transfer in the $$^{16}\hbox {O}+^{12}\hbox {C}$$ scattering and its impact on the nuclear rainbow

2021

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“…For the core-identical 16 O+ 12 C system, the elastic and inelastic α transfer channels are indistinguishable from the elastic and inelastic scattering channels, respectively. Therefore, the angular distributions of the observed elastic and inelastic 16 O+ 12 C scattering are the coherent sums of the pure scattering and α transfer amplitudes, and the total cross section is given by [2,5]…”

Section: Crc Formalismmentioning

confidence: 99%

“…The elastic transfer process was observed for several light heavy-ion (HI) systems at low energies [1], and it had been studied over the years to extract the structure information on the nucleon-and cluster spectroscopic factors (see, e.g., the review [2]) and the asymptotic normalization coefficients [3,4]. Our recent studies have shown clearly the direct link between the elastic transfer process and the parity dependence of the nucleus-nucleus optical potential (OP), a natural consequence of the core-exchange symmetry of the dinuclear system under study [5,6]. These results are an important step toward a deeper understanding of the core-exchange effect in the elastic nucleus-nucleus scattering, which has motivated a renewed interest on this topic [7].…”

Section: Introductionmentioning

confidence: 99%

Elastic and Inelastic Alpha Transfer in the 16o+12c Scattering

Phuc

Khoa

2021

Comm. in Phys.

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The elastic scattering cross section measured at energies $E\lesssim 10$ MeV/nucleon for some light heavy-ion systems having two identical cores like \oc exhibits an enhanced oscillatory pattern at the backward angles. Such a pattern is known to be due to the transfer of the valence nucleon or cluster between the two identical cores. In particular, the elastic $\alpha$ transfer has been shown to originate directly from the core-exchange symmetry in the elastic \oc scattering. Given the strong transition strength of the $2^+_1$ state of $^{12}$C and its large overlap with the $^{16}$O ground state, it is natural to expect a similar $\alpha$ transfer process (or inelastic $\alpha$ transfer) to take place in the inelastic \oc scattering. The present work provides a realistic coupled channel description of the $\alpha$ transfer in the inelastic \oc scattering at low energies. Based on the results of the 4 coupled reaction-channels calculation, we show a significant contribution of the $\alpha$ transfer to the inelastic \oc scattering cross section at the backward angles. These results suggest that the explicit coupling to the $\alpha$ transfer channels is crucial in the studies of the elastic and inelastic scattering of a nucleus-nucleus system with the core-exchange symmetry.\Keywords{optical potential, coupled reaction channels, inelastic $\alpha$ transfer

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Nuclear Reactions with Stable and Radioactive Ion Beams at LAFN-IFUSP

Lépine‐Szily

2021

Braz J Phys

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Elastic transfer and parity dependence of the nucleus-nucleus optical potential

Abstract: Elastic transfer and parity dependence of the nucleus-nucleus optical potential. Physical Review C, 100(5), article no. 054615. For guidance on citations see FAQs.

Cited by 10 publications

References 92 publications

Elastic $$\alpha $$ transfer in the $$^{16}\hbox {O}+^{12}\hbox {C}$$ scattering and its impact on the nuclear rainbow

Elastic $$\alpha $$ transfer in the $$^{16}\hbox {O}+^{12}\hbox {C}$$ scattering and its impact on the nuclear rainbow

Elastic and Inelastic Alpha Transfer in the 16o+12c Scattering

Nuclear Reactions with Stable and Radioactive Ion Beams at LAFN-IFUSP

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