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arXiv · 2210.14316

Neutral-current neutrino cross section and expected supernova signals for $^{40}$Ar from a three-fold increase in the magnetic dipole strength

W. Tornow·A. P. Tonchev·S. W. Finch·Krishichayan·X. B. Wang·A. C. Hayes·H. G. D. Yeomans·D. A. Newmark
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Abstract

In view of the great interest in liquid argon neutrino detectors, the $^{40}$Ar($\gamma,\gamma'$)$^{40}$Ar$^{*}$ reaction was revisited to guide a calculation of the neutral current neutrino cross section at supernova energies. Using the nuclear resonance fluorescence technique with a monoenergetic, 99% linearly polarized photon beam, we report a three-fold increase in magnetic dipole strength at around 10 MeV in $^{40}$Ar. Based on shell-model calculations, and using the experimentally identified transitions, the neutral current neutrino cross sections for low-energy reactions on $^{40}$Ar are calculated.

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W. Tornow, A. P. Tonchev, S. W. Finch, Krishichayan, X. B. Wang, A. C. Hayes, H. G. D. Yeomans, D. A. Newmark. 2022-10-25. Neutral-current neutrino cross section and expected supernova signals for $^{40}$Ar from a three-fold increase in the magnetic dipole strength. https://doi.org/10.1016/j.physletb.2022.137576

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