Electron-antineutrino spectrum from precision measurements of $^{144}$Pr-decay
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arXiv
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| Natura: | Preprint |
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2025
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| author | Derbin, A. V. Drachnev, I. S. Ivanov, D. V. Kotina, I. M. Muratova, V. N. Niyazova, N. V. Semenov, D. A. Trushin, M. V. Unzhakov, E. V. |
| author_facet | Derbin, A. V. Drachnev, I. S. Ivanov, D. V. Kotina, I. M. Muratova, V. N. Niyazova, N. V. Semenov, D. A. Trushin, M. V. Unzhakov, E. V. |
| contents | The $^{144}$Ce -- $^{144}$Pr electron antineutrino source is one of the most suitable radiochemical sources for experiments searching for the oscillations of active neutrinos to the light sterile state. In the current work the $β$-spectra of $^{144}\rm{Ce}$ -- ${^{144}\rm{Pr}}$ source have been measured by two types of $β$-spectrometers based on silicon Si(Li) detectors in order to determine the energy spectrum of electron anti-neutrino emitted in the $β$-decay of $\rm{^{144}Pr}$ nuclei. The nuclear shape factor of the ground state beta transition in ${^{144}\rm{Pr}}-{^{144}\rm{Nd}}$ has been obtained with high precision: $C(W) = 1 + (-0.0301 \pm 0.0007)W + (-0.101 \pm 0.006)W^{-1}$. The reduced cross section for the inverse beta decay reaction on hydrogen for the $\rm{{^{144}Pr}}$ electron anti-neutrino source has been defined as $\rm{(4.7344 \pm 0.0006_{stat} \pm 0.013_{syst}) \times 10^{-44}~cm^2 {decay}^{-1}}$ that provides sufficient sensitivity to search for a sterile neutrino with a mass of $m_4 \sim 1$~eV and a mixing angle $Sin^2(2θ_{14}) \sim 0.005$ using standard disappearance method. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_03716 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron-antineutrino spectrum from precision measurements of $^{144}$Pr-decay Derbin, A. V. Drachnev, I. S. Ivanov, D. V. Kotina, I. M. Muratova, V. N. Niyazova, N. V. Semenov, D. A. Trushin, M. V. Unzhakov, E. V. Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology The $^{144}$Ce -- $^{144}$Pr electron antineutrino source is one of the most suitable radiochemical sources for experiments searching for the oscillations of active neutrinos to the light sterile state. In the current work the $β$-spectra of $^{144}\rm{Ce}$ -- ${^{144}\rm{Pr}}$ source have been measured by two types of $β$-spectrometers based on silicon Si(Li) detectors in order to determine the energy spectrum of electron anti-neutrino emitted in the $β$-decay of $\rm{^{144}Pr}$ nuclei. The nuclear shape factor of the ground state beta transition in ${^{144}\rm{Pr}}-{^{144}\rm{Nd}}$ has been obtained with high precision: $C(W) = 1 + (-0.0301 \pm 0.0007)W + (-0.101 \pm 0.006)W^{-1}$. The reduced cross section for the inverse beta decay reaction on hydrogen for the $\rm{{^{144}Pr}}$ electron anti-neutrino source has been defined as $\rm{(4.7344 \pm 0.0006_{stat} \pm 0.013_{syst}) \times 10^{-44}~cm^2 {decay}^{-1}}$ that provides sufficient sensitivity to search for a sterile neutrino with a mass of $m_4 \sim 1$~eV and a mixing angle $Sin^2(2θ_{14}) \sim 0.005$ using standard disappearance method. |
| title | Electron-antineutrino spectrum from precision measurements of $^{144}$Pr-decay |
| topic | Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.03716 |