Magnetorotational Supernova Neutrino Emission Spectra and Prospects for Observations by Large-Size Underwater Telescopes

Kondratyev, V. N.

doi:10.1134/s106377882401023x

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…It is worth noting that although the intensity electromagnetic field, S m , considered here is much less than the upper power limit due to, e.g., the vacuum short circuit, the present intensities of gamma ray sources are still very small compared to the S m value. However, very strong X-ray fluxes arise during astrophysical phenomena, e.g., supernova explosions, which have an important role in neutrino nuclear reactions [36].…”

Section: Discussionmentioning

confidence: 99%

External Radiation Assistance of Neutrinoless Double Electron Capture

Kondratyev,

Karpeshin

2024

Atoms

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The influence of electromagnetic radiation on nuclear processes is applied to an example of a neutrinoless double electron capture (0ν2ec). For cases with X-ray free-electron lasers (X-ray FELs) and/or inverse Compton X-ray sources, it was shown that such a decay can be significantly enhanced by tuning the system to the resonant conditions through the absorption and/or emission of a photon with the decay resonance defect energy Δ. In this case, the 0v2ec decay rate Γ2e of nuclide Z grew linearly with field intensity (S/Sz) up to the X-ray flux power Sm~Z6, while Sz~Z6 (Γ/Δ)2 with decay width Γ of a daughter atom. For the case of 78Kr → 78Se − 0ν2eL1L1 capture we find Sz~109 W cm−2 and Sm~1017 W cm−2 which indicate a possibility of increasing decay rate to eight orders of magnitude or even larger.

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Section: Discussionmentioning

confidence: 99%

External Radiation Assistance of Neutrinoless Double Electron Capture

Kondratyev,

Karpeshin

2024

Atoms

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Neutrinos of magnetorotational supernovae

Kondratyev

2024

Int. J. Mod. Phys. E

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The neutrino dynamics in hot and dense magnetized matter corresponding to a supernova explosion is considered. It is shown that accounting for fluctuations during interaction of neutrinos with matter leads to the Fokker–Planck equation for the dynamics of the phase space distribution function. The addition to the energy transfer component of the kinetic equation is determined by straggling in neutrino collisions with a magnetized nucleon gas caused by the neutral current Gamow–Teller interaction. When accounting for the effect of fluctuations, the switching of acceleration and stopping regimes in neutrino evolution is evident for average energy. The effect of fluctuations leads to an additional increase in the hardness of the neutrino spectra. It is shown that the high-energy component of the electron antineutrino flux is enhanced in addition due to the effect of neutrino oscillations. Such a strengthening of the spectrum hardness is especially noticeable in the case of the inverted mass ordering and makes the signal more registrable by ground-based detectors. The possibilities of detecting supernova neutrinos by KM3NeT and Baikal-GVD observatories are discussed. The sensitivity of counting rate to the mass ordering is demonstrated to increase at growing difference in the hardness of energy spectra for various flavors.

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Magnetorotational Supernova Neutrino Emission Spectra and Prospects for Observations by Large-Size Underwater Telescopes

Cited by 2 publications

References 31 publications

External Radiation Assistance of Neutrinoless Double Electron Capture

External Radiation Assistance of Neutrinoless Double Electron Capture

Neutrinos of magnetorotational supernovae

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