Study of the threshold anomaly in the elastic scattering of d + 197Au

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR

Journal of Physics G: Nuclear and Particle Physics Pub Date : 2023-01-18 DOI:10.1088/1361-6471/acb452

Tomas Giudice, D. Abriola, A. Arazi, E. de Barbará, María Angélica Cardona, Jorge Gómez, Daniel A. Hojman, R. I. Id Betan, M. Kohen, Natalia Llaneza, G. Martı́, B. Paes, D. Schneider, H. Soler, J. Lubian

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引用次数: 1

Abstract

Measurements of the elastic scattering angular distribution for the d + 197Au system were carried out covering deuteron incident energies in the range from 5 to 16 MeV, i.e. approximately 50% below and above the Coulomb barrier. A critical interaction distance of dI = 2.49 fm was determined from these distributions, which is comparable to that of the radioactive halo nucleus 6He. The experimental angular distributions were systematically analyzed using two alternative models: the semimicroscopic São Paulo and the eﬀective Woods-Saxon optical potentials, for which the best-ﬁtting parameters were determined. These potentials, integrated in the vicinity of the sensitivity radius, were calculated for each energy. For both models, the energy dependence of these integrals presented the breakup threshold anomaly around the coulomb barrier, a typical signature of weakly bound nuclei.

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d + 197Au弹性散射阈值异常研究

对d+197Au系统的弹性散射角分布进行了测量，覆盖了5至16MeV范围内的氘入射能量，即库仑势垒以下和以上约50%。根据这些分布确定了dI=2.49fm的临界相互作用距离，该距离与放射性晕核6He的相互作用距离相当。使用两种替代模型对实验角分布进行了系统分析：半微观圣保罗模型和有效的Woods-Saxon光学势，确定了最佳拟合参数。这些电势，在灵敏度半径附近积分，是为每种能量计算的。对于这两个模型，这些积分的能量依赖性表现出库仑势垒周围的破裂阈值异常，这是弱束缚核的典型特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

期刊介绍： Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.