Optical model potentials for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>6</mml:mn></mml:msup><mml:mtext>He</mml:mtext><mml:mo>+</mml:mo><mml:msup><mml:mrow /><mml:mn>209</mml:mn></mml:msup></mml:mrow></mml:math>Bi reaction from a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">Pb</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>208</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>(<mml:

Yang, L.; Lin, C. J.; Jia, H. M.; Feng, Yan; Wu, Zihao; Xu, X. X.; Zhang, H. Q.; Liu, Z. H.; Bao, Pengfei; Sun, L. J.; R., N.

doi:10.1103/physrevc.89.044615

Cited by 18 publications

(15 citation statements)

References 65 publications

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“…In the previous work [18], an increasing trend toward an imaginary potential with energy decreasing in the subbarrier region was observed clearly in the halo system 6 He + 209 Bi for the first time. However, the energy was too high to explore the threshold region, which contains critical information to examine the applicability of the dispersion relation.…”

Section: Introductionmentioning

confidence: 62%

“…Details of the expression form of the OMP, as well as the optical model (OM), distorted-wave Born approximation (DWBA), and coupled reaction channel (CRC) calculations, are described in Ref. [18].…”

Section: Data Analysis and Discussionmentioning

confidence: 99%

“…So far, most research has employed stable weakly bound projectiles, such as 6,7 Li and 9 Be [5]. Due to experimental difficulties, only a few investigations have been performed on the radioactive halo nuclei, like 6 He [11,14,18], 7 Be, and 8 B [19]. However, because of the large data uncertainties as well as the lack of enough data points [11,16], it is nearly impossible to investigate the optical potentials of halo systems in the subbarrier region directly with low-intensity radioactive ion beams.…”

Section: Introductionmentioning

confidence: 99%

“…However, because of the large data uncertainties as well as the lack of enough data points [11,16], it is nearly impossible to investigate the optical potentials of halo systems in the subbarrier region directly with low-intensity radioactive ion beams. Even for stable weakly bound systems, we are still far from a clear understanding of the properties of OMPs, e.g., the behavior of the potential in the deep subbarrier region leaves much to be desired [5,20,21], and the application of the dispersion relation is still debatable [4,17,18,22].…”

Section: Introductionmentioning

confidence: 99%

“…And experimental attempts have been made to study OMPs of the weakly bound nuclear systems 17 F + 13 C [25] and 6 He + 12 C [26]. Recently, we have further applied this method to study optical potentials of the halo systems 6 He + 209 Bi [18] and 64 Zn [27], with the one-proton transfer reactions 208 Pb( 7 Li, 6 He) and 63 Cu( 7 Li, 6 He) induced by the stable beam 7 Li at energies around and above the Coulomb barrier, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Abnormal behavior of the optical potential for the halo nuclear system He6+Bi209

et al. 2017

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In a recent transfer reaction measurement of 208 Pb(7 Li, 6 He) 209 Bi at energies around and below the Coulomb barrier, the optical model potentials of the halo nuclear system 6 He + 209 Bi were extracted by fitting the experimental data with the theoretical frameworks of the distorted-wave Born approximation and coupled reaction channels, respectively. With the high-precision result, a complete picture of the behavior of the optical potential for this halo system is clearly derived for the first time. The real potential presents a bell-like shape around the barrier as a normal threshold anomaly. However, for the imaginary part, it first increases with the energy decreasing below the barrier and then falls quickly to 0, hence the threshold energy can be determined by fitting the variation trend. Moreover, the result also provides some evidence that the dispersion relation does not hold for this halo nuclear system, which calls for further investigation of the underlying physics.

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Section: Introductionmentioning

confidence: 62%

Section: Data Analysis and Discussionmentioning

confidence: 99%