Development of a Reference Database for Beta-Delayed Neutron Emission

Dimitriou, P.; Dillmann, I.; Singh, Balraj; Piksaikin, V.M.; Rykaczewski, K. P.; Taín, J. L.; Algora, A.; Banerjee, K.; Borzov, I. N.; Cano‐Ott, D.; Chiba, Satoshi; Fallot, M.; Foligno, Daniela; Grzywacz, R.; Huang, Xiaolong; Marketin, Tomislav; Minato, Futoshi; Mukherjee, G.; Rasco, B. C.; Sonzogni, A. A.; Verpelli, M.; Egorov, A.S.; Estienne, M.; Giot, L.; Gremyachkin, D.E.; Madurga, M.; McCutchan, E. A.; Mendoza, E.; Mitrofanov, K.V.; Narbonne, M.; Romojaro, P.; Sánchez-Caballero, A.; Scielzo, N. D.

doi:10.1016/j.nds.2021.04.006

Cited by 32 publications

(12 citation statements)

References 233 publications

(868 reference statements)

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“…Further progress along all these lines will hopefully help to improve the predictions. Finally, note that on the basis of the β-decay strength, the β-delayed processes, including neutron emission and fission for the heaviest species, also need to be derived (Dimitriou et al 2021;.…”

Section: Sensitivity To β-Decay Ratesmentioning

confidence: 99%

R-Process Nucleosynthesis in Neutron Star Merger Ejecta and Nuclear Dependences

Goriely

Kullmann

2023

Handbook of Nuclear Physics

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Despite the recent success of hydrodynamical simulations of binary compact objects, the details of r-processing in these events are still affected by a variety of uncertainties, including in particular those associated with the still complex nuclear physics description of exotic neutron-rich nuclei. R-process nucleosynthesis calculations require a reaction network consisting of about 5000 species from protons up to Z 110 lying between the valley of β-stability and the neutron drip line. Since only an extremely tiny amount of experimental data on neutron-rich nuclei produced during the r-process are known experimentally, theoretical models are crucial in providing the various predictions. Our capacity to predict fundamental nuclear ingredients, namely, nuclear masses, β-decay rates, radiative neutron capture rates, and fission probabilities, for all those 5000 nuclei is discussed in the present chapter. To analyze their impact on the r-process S. Goriely ( ) • I. Kullmann Institut d'Astronomie et d'Astrophysique, CP-

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Section: Sensitivity To β-Decay Ratesmentioning

confidence: 99%

R-Process Nucleosynthesis in Neutron Star Merger Ejecta and Nuclear Dependences

Goriely

Kullmann

2023

Handbook of Nuclear Physics

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“…The maximum relative uncertainty (third column) is the ratio of the size of the larger one of the upper or lower experimental uncertainties to the nominal value, in percent. (100) indicates that the P 1n value only has an upper limit and the size of its relative uncertainty is 100%, according to the convention in Dimitriou et al (2021). Long dashes (-) indicate that the nominal value of (Mumpower et al 2016).…”

Section: First-order Sensitivity Indicesmentioning

confidence: 99%

Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region

Kiss

Vitéz-Sveiczer

Saito

et al. 2022

ApJ

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The β-delayed neutron-emission probabilities of 28 exotic neutron-rich isotopes of Pm, Sm, Eu, and Gd were measured for the first time at RIKEN Nishina Center using the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array. The existing β-decay half-life (T 1/2) database was significantly increased toward more neutron-rich isotopes, and uncertainties for previously measured values were decreased. The new data not only constrain the theoretical predictions of half-lives and β-delayed neutron-emission probabilities, but also allow for probing the mechanisms of formation of the high-mass wing of the rare-earth peak located at A ≈ 160 in the r-process abundance distribution through astrophysical reaction network calculations. An uncertainty quantification of the calculated abundance patterns with the new data shows a reduction of the uncertainty in the rare-earth peak region. The newly introduced variance-based sensitivity analysis method offers valuable insight into the influence of important nuclear physics inputs on the calculated abundance patterns. The analysis has identified the half-lives of 168Sm and of several gadolinium isotopes as some of the key variables among the current experimental data to understand the remaining abundance uncertainty at A = 167–172.

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“…In addition to β-delayed neutron emission probabilities, β-delayed neutrons provide a way to determine β-decay half-lives. A recent compilation on β-delayed neutron emission summarizes the current status [140].…”

Section: β-Decay Experiments For Nuclear Astrophysicsmentioning

confidence: 99%

“…The open squares correspond to the valley of β-stability. The double solid lines depict the neutron and proton magic numbers of the β-decay strength, the β-delayed processes, including neutron emission and fission for the heaviest species, also need to be derived [70,140].…”

Section: β-Decay Ratesmentioning

confidence: 99%

Nuclear Data and Experiments for Astrophysics

Kankainen

Goriely

2022

The Euroschool on Exotic Beams, Vol. VI

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Nuclear astrophysics aims to understand the origin of elements and the role of nuclear processes in astrophysical events. Nuclear reactions and reaction rates depend strongly on nuclear properties and on the astrophysical environment. Nuclear inputs for stellar reaction rates involve a variety of nuclear properties, theoretical models, and experimental data. Experiments providing data for nuclear astrophysics range from stable ion beam direct measurements to radioactive beam experiments employing inverse kinematics or indirect methods. Many properties relevant for astrophysical calculations, such as nuclear masses and β-decays, have also been intensively studied. This contribution shortly introduces selected astrophysical processes, discusses the related nuclear data needs, and gives examples of recent experimental and theoretical efforts in the field. Origin of Elements and Nucleosynthesis Processes The Composition of the UniverseOur knowledge of the composition of the Universe in general, and of our Solar System in particular, results almost entirely from the analysis of electromagnetic spectra originating from the various observable sources in the Universe, i.e., the

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Development of a Reference Database for Beta-Delayed Neutron Emission

Cited by 32 publications

References 233 publications

R-Process Nucleosynthesis in Neutron Star Merger Ejecta and Nuclear Dependences

R-Process Nucleosynthesis in Neutron Star Merger Ejecta and Nuclear Dependences

Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region

Nuclear Data and Experiments for Astrophysics

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