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Nagai, Y.; Suzuki, Takeshi; Kikuchi, Takashi; Shima, T.; Kii, Toshiteru; Satō, Hiroshi; Igashira, M.

doi:10.1103/physrevc.56.3173

Cited by 42 publications

(43 citation statements)

References 23 publications

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“…It could not be subjected to our piecewise splining or Monte Carlo sampling of data points because of an extreme scarcity of data in the E CM < 300 keV range. This is despite recent efforts to measure this crucial cross section [30,31] in the relevant energy range, which have [29], SKM fit to that curve with 2σ errors, and current experimental data in the BBN energy range [30,31]. An explanation of our nuclear data figures may be found near the beginning of Sec.…”

Section: P(n γ)Dmentioning

confidence: 67%

Estimating reaction rates and uncertainties for primordial nucleosynthesis

2000

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We present a Monte Carlo method for direct incorporation of nuclear inputs in primordial nucleosynthesis calculations. This method is intended to remedy shortcomings of current error estimation, by eliminating intermediate data evaluations and working directly with experimental data, allowing error estimation based solely on published experimental uncertainties. This technique also allows simple incorporation of new data and reduction of errors with the introduction of more precise data. Application of our method indicates that previous error estimates on the calculated abundances were too large by as much as a factor of three. Since uncertainties in the BBN calculation currently dominate inferences drawn from light-element abundances, the re-estimated errors have important consequences for cosmic baryon density, neutrino physics, and lithium depletion in halo stars. Our direct method allows detailed discussion of the status of the nuclear inputs, by identifying clearly the places where improved cross section measurements would be most useful. 26.35.+c, 98.80.Ft

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Section: P(n γ)Dmentioning

confidence: 67%

Estimating reaction rates and uncertainties for primordial nucleosynthesis

2000

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“…Our final set of experimental data consists of radiative capture data from Refs. [12][13][14][15][16] and photodisintegration data from Refs. [17][18][19][20][21][22][23][24].…”

Section: B Thepn →Dγ Processmentioning

confidence: 99%

Alternative formation model for antideuterons from dark matter

Dal

Raklev

2015

Phys. Rev. D

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Antideuterons are a potential messenger for dark matter annihilation or decay in our own galaxy, with very low backgrounds expected from astrophysical processes. The standard coalescence model of antideuteron formation, while simple to implement, is shown to be under considerable strain by recent data from the LHC. We suggest a new empirically based model, with only one free parameter, which is better able to cope with these data, and we explore the consequences of the model for dark matter searches.

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“…This allows to study systematically the effects of the final-state interaction (FSI) without the necessity to introduce sophisticated nuclear structure models. Magnetic contributions to the continuum transitions are usually much weaker than electric transitions, except for the deuteron breakup at low energies [12] and for the excitation of resonances. We will limit ourselves to the discussion of direct electric transitions to the continuum, with emphasis on E1 transitions, but the search for low-lying M1 strength and its theoretical description [13] remains an interesting challenge for future studies.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic strength of neutron and proton single-particle halo nuclei

2005

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Electromagnetic strength functions of halo nuclei exhibit universal features that can be described in terms of characteristic scale parameters. For a nucleus with nucleon+core structure the reduced transition probability, as determined, e.g., by Coulomb dissociation experiments, shows a typical shape that depends on the nucleon separation energy and the orbital angular momenta in the initial and final states. The sensitivity to the final-state interaction (FSI) between the nucleon and the core can be studied systematically by varying the strength of the interaction in the continuum. In the case of neutron+core nuclei analytical results for the reduced transition probabilities are obtained by introducing the effective-range expansion. The scaling with the relevant parameters is found explicitly. General trends are observed by studying several examples of neutron+core and proton+core nuclei in a single-particle model assuming Woods-Saxon potentials. Many important features of the neutron halo case can be obtained from a square-well model. Rather simple analytical formulas are found. The nucleon-core interaction in the continuum affects the determination of astrophysical S factors at zero energy in the method of asymptotic normalisation coefficients (ANC). It is also relevant for the extrapolation of radiative capture cross sections to low energies.

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Measurement of1H(n,γ)2Hreaction cross section at a comparable

Cited by 42 publications

References 23 publications

Estimating reaction rates and uncertainties for primordial nucleosynthesis

Estimating reaction rates and uncertainties for primordial nucleosynthesis

Alternative formation model for antideuterons from dark matter

Electromagnetic strength of neutron and proton single-particle halo nuclei

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