Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

Voinov, A.; Brandenburg, K.; Brune, C. R.; Giri, R.; Grimes, S. M.; Massey, T. N.; Meisel, Z.; Paneru, S. N.; Richard, A.; Perdikakis, G.; Falduto, Ashton

doi:10.1103/physrevc.104.015805

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…Phenomenological and semi-microscopic optical model parametrizations adjust the imaginary potential to agree with experimental data [107]. It has been already suggested in 2007 [112] and recently corroborated by experimental evidence [107] that the isovector component, constrained by data near stability, does not adequately reproduce the effect of the neutron-proton asymmetry that exists in nature. More experimental data and theoretical investigations are needed to quantify this deficiency of modern theories.…”

Section: Astrophysically Relevant Reactionsmentioning

confidence: 86%

“…A second way to inform nuclear theory from experimental data is by reproducing evaporation spectra from highly excited compound nuclei. While the so-called evaporation technique [106] is typically suitable for determining the level densities of the excited compound systems, recently, it has been demonstrated in the literature [107] that the evaporated particle spectra can also provide some insight into optical potential properties.…”

Section: Compound-nuclear Reactionsmentioning

confidence: 99%

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Optical potentials for the rare-isotope beam era

Hebborn

Nunes

Potel

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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We review recent progress and motivate the need for further developments in nuclear optical potentials that are widely used in the theoretical analysis of nucleon elastic scattering and reaction cross sections. In regions of the nuclear chart away from stability, which represent a frontier in nuclear science over the coming decade and which will be probed at new rare-isotope beam facilities worldwide, there is a targeted need to quantify and reduce theoretical reaction model uncertainties, especially with respect to nuclear optical potentials. We first describe the primary physics motivations for an improved description of nuclear reactions involving short-lived isotopes, focusing on its benefits for fundamental science discoveries and applications to medicine, energy, and security. We then outline the various methods in use today to build optical potentials starting from phenomenological, microscopic, and ab initio methods, highlighting in particular the strengths and weaknesses of each approach. We then discuss publicly-available tools and resources facilitating the propagation of recent progresses in the field to practitioners. Finally, we provide a set of open challenges and recommendations for the field to advance the fundamental science goals of nuclear reaction studies in the rare-isotope beam era.

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Section: Astrophysically Relevant Reactionsmentioning

confidence: 86%

Section: Compound-nuclear Reactionsmentioning

confidence: 99%

Optical potentials for the rare-isotope beam era

Hebborn

Nunes

Potel

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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“…While direct measurements of neutron capture on very short-lived nuclides are presently not feasible, multiple indirect experimental techniques and advances in nuclear-reaction theory make it possible to obtain constraints for important reaction rates (figure 3): β-delayed neutron emission [244,245], the β-Oslo [246,247] and inverse-Oslo [248] methods, transfer reactions [249][250][251], the surrogate reaction method [252][253][254], the Trojan Horse Method [114], and Coulomb breakup [255][256][257] offer pathways to study neutron-capture reactions on short-lived isotopes. In addition, measurements of evaporation spectra at stable-beam facilities [258] provide complementary information for nuclei just off stability, e.g., for those relevant to i-process nucleosynthesis.…”

Section: How Did We Get Here?mentioning

confidence: 99%

Horizons: nuclear astrophysics in the 2020s and beyond

Schatz

Reyes

Best

et al. 2022

J. Phys. G: Nucl. Part. Phys.

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Nuclear astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of the field, the new open questions that have emerged, and the tremendous scientific opportunities that have opened up with major advances in capabilities across an ever growing number of disciplines and subfields that need to be integrated. We take a holistic view of the field discussing the unique challenges and opportunities in nuclear astrophysics in regards to science, diversity, education, and the interdisciplinarity and breadth of the field. Clearly nuclear astrophysics is a dynamic field with a bright future that is entering a new era of discovery opportunities.

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Charged-particle optical potentials tested by first direct measurement of the Cu59(p,α)Ni56 reaction

Avrigeanu

2022

Phys. Rev. C

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Reduction of the neutron imaginary potential off the stability line and its possible impact on neutron capture rates

Cited by 3 publications

References 21 publications

Optical potentials for the rare-isotope beam era

Optical potentials for the rare-isotope beam era

Horizons: nuclear astrophysics in the 2020s and beyond

Charged-particle optical potentials tested by first direct measurement of the Cu59(p,α)Ni56 reaction

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