Direct and indirect 
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 transfer in elastic 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">O</mml:mi><mml:mprescripts /><mml:none /><mml:mn>16</mml:mn></mml:mmultiscripts><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:math>
 scattering

Phuc, Nguyen Tri Toan; Phuc, Nguyen Hoang; Khoa, Dao T.

doi:10.1103/physrevc.98.024613

Cited by 14 publications

(28 citation statements)

References 56 publications

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“…Therefore, the total elastic amplitude must be a coherent sum of the elastic scattering (ES) amplitude f ES and elastic transfer (ET) amplitude f ET . The interference between f ES and f ET was shown by the recent multichannel CRC analysis of elastic 16 O + 12 C scattering [32] to give rise to an enhanced oscillating elastic cross section at large angles, using the α spectroscopic factors predicted by the large-scale SM calculation [39] and 4α cluster model of 16 O [40]. Because the multichannel coupling of the indirect reaction channels to the elastic 16 O + 12 C scattering channel can be accounted for by using an effective α spectroscopic factor adjusted to the best CRC fit to elastic data, taking into account the direct α transfer only [32], it is sufficient to focus on the coupling between the elastic scattering 12 C ( 16 O, 16 O) 12 C and direct α transfer 12 C( 16 O, 12 C) 16 O channels in the present study.…”

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

confidence: 93%

“…The details of the DFM calculation of the real OP, Coulomb potential, and the WS parameters of the imaginary OP are given in Ref. [32]. The obtained OM description of the elastic 16 O + 12 C scattering data measured at incident energies of 115.9, 124 MeV [20], and 132 MeV [16,17] is shown in Fig.…”

Section: Optical Model Description Of the Elastic 16 O+ 1c Scattering And Nuclear Rainbowmentioning

confidence: 99%

“…Further details of the CRC calculation can be found in Ref. [32]. An important input for the CRC calculation is the dinuclear overlap 12 C| 16 O that is directly proportional to the α spectroscopic factor S α .…”

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

confidence: 99%

“…Such a procedure was shown by Frahn and Hussein [29][30][31] to result on the modified elastic S-matrix that contains a parity dependent component. While the oscillation of the low-energy elastic 12 C + 12 C or 16 O + 16 O cross section at backward angles is caused mainly by the boson symmetry of two identical nuclei [10,25,26], the direct and indirect α transfer was shown recently as the main physics origin of the oscillating enhancement of the elastic 16 O + 12 C cross section at backward angles [32]. In general, the OM analysis of low-energy elastic 16 O + 12 C data is more difficult compared to other light HI systems [28], and andependent term was often added to the complex OP, which was suggested by von Oertzen and Bohlen [33] as necessary to account for the core-core exchange or elastic α transfer between 16 O and 12 C (see Fig.…”

Section: Introductionmentioning

confidence: 98%

“…Some scenarios of the α transfer in elastic 16 O + 12 C scattering were considered within the coupled reaction channel (CRC) formalism [36,37], which is the most appropriate method to study transfer reactions. A detailed CRC analysis of the α transfer in the elastic 16 O + 12 C scattering at low energies was done recently [32], where the multistep coupling of the elastic scattering channel to the inelastic scattering, direct and indirect α transfer channels was treated explicitly, and a good CRC description of the data was obtained using the α spectroscopic factors predicted by the large-scale shellmodel (SM) calculation [39].…”

Section: Introductionmentioning

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: 93%

Section: Optical Model Description Of the Elastic 16 O+ 1c Scattering And Nuclear Rainbowmentioning

confidence: 99%

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

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

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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Clusters in light nuclei: history and recent developments

Lombardo,

Dell’Aquila

2023

Riv. Nuovo Cim.

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In this review, we discuss recent advancements in the study of clustering phenomena occurring in light nuclei, and their influence on nuclear structure, dynamics, and astrophysics. In the introduction, we outline the historical steps leading to the concept of $$\alpha $$ α -clusterization in nuclei and provide a comprehensive description of the evolution of nuclear models capable to describe clustering aspects in nuclear systems and of the main experiments and discoveries leading to the development of this research field. We also describe some spectroscopic techniques that are used to establish the clustered nature of a given nuclear state. Some relevant experimental and theoretical findings recently reported both in experimental and theoretical works are discussed in the text. We put emphasis on recent achievements and remaining problems in the description of the structure of light isotopes, from helium to neon, including both self- and non-self-conjugate nuclei. Particular attention to the implication in the nuclear astrophysics context and to clustering effects in the dynamics of nuclear reactions is pursued all along the review.

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