First measurement of a p(n, gamma)d reaction cross section between 10 and 80 keV

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

doi:10.1086/187744

Cited by 48 publications

(33 citation statements)

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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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“…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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“…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: 86%

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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“…The experimental data in Fig.1 have been obtained from either the neutron capture reaction itself [47] or its inverse process [48,49], using detailed balance for the latter. We can see that our results describe very well the energy dependence of σ(np → γd) exp all the way up to T n ≈ 100 MeV.…”

Section: A Radiative Capture Of Neutron On Protonmentioning

confidence: 99%

“…E ′c e is determined from the condition: and electric-dipole amplitudes, respectively. The data are taken either from the neutron capture reaction itself [47], or from its inverse process [48,49], with the use of detailed balance for the latter. …”

Section: Appendix A: Phase Space Integral and Kinematicsmentioning

confidence: 99%

Erratum: Neutrino reactions on the deuteron [Phys. Rev. C 63, 034617 (2001)]

Nakamura¹,

Satô²,

Gudkov³

et al. 2006

Phys. Rev. C

156

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The cross sections for the ν−d andν−d reactions are calculated for the incident energy up to E ν = 170 MeV, with the use of a phenomenological Lagrangian approach. We assess and improve the reliability of the employed calculational method by examining the dependence of the results on various input and approximations that go into the calculation. The main points of improvements over the existing work are: (1) use of the "modern" NN potentials;(2) use of the more accurate nucleon weak-interaction form factors; (3) monitoring the strength of a vertex that governs the exchange-current contribution, with the use of data on the related process, n + p → d + γ. In addition to the total cross sections, we present various differential cross sections that are expected to be useful for the SNO and other experiments.In the low energy regime relevant to the solar neutrinos, the newly calculated total cross sections essentially agree with the existing literature values. The origins of slight differences found for higher energies are discussed. The ratio between the neutral-current and chargedcurrent reaction cross sections is found to be extremely stable against any variations in the input of our calculation.

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First measurement of a p(n, gamma)d reaction cross section between 10 and 80 keV

Cited by 48 publications

References 0 publications

Alternative formation model for antideuterons from dark matter

Alternative formation model for antideuterons from dark matter

Estimating reaction rates and uncertainties for primordial nucleosynthesis

Erratum: Neutrino reactions on the deuteron [Phys. Rev. C 63, 034617 (2001)]

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