unzhakov
876e1e3ab8
- Add neutrino mass parameter to SpectrumConfig and CLI interface - Update PhaseSpace component to handle neutrino mass effects properly - Update CSV headers to show basic endpoint and all transition types - Add --csv-verbosity option to CLI with 'full' and 'concise' options - Fix comparison plots to properly show linear scale variations - Add comprehensive tests for neutrino mass functionality
43 lines
1.5 KiB
Markdown
43 lines
1.5 KiB
Markdown
# Paulsen et al. (2024) — High precision measurement of 99Tc β spectrum
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## Citation
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Paulsen, M., Ranitzsch, P.C.-O., Loidl, M., et al. (2024). High precision measurement of the ⁹⁹Tc β spectrum. *Physical Review C*, 110, 055503. DOI: 10.1103/PhysRevC.110.055503
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## Key Results
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| Parameter | Value | Method |
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|---|---|---|
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| Q_β | 295.82(16) keV | MMC measurement |
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| g_A^eff | 1.526(92) | Spectrum shape (CVC-fixed sNME) |
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| g_V^eff | 0.376(5) | Half-life normalization |
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| g_A^eff (quenched) | 0.574(36) | Half-life normalization |
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| E_β | 98.51(23) keV | Theoretical spectrum integration |
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| log f | −0.47660(22) | Theoretical spectrum |
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| log f t | 12.3478(23) | Partial half-life |
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## Methodology
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- **Detector**: Metallic Magnetic Calorimeters (MMCs) at LNHB and PTB
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- **Energy threshold**: 0.65 keV (orders of magnitude lower than previous measurements)
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- **Energy resolution**: 0.1 keV at 383 keV
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- **Nuclear model**: NUSHELLX with GLEKPN valence space, Mach interaction
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- **sNME treatment**: CVC-fixed (not ESSM)
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## Key Figures
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- **Figure 9**: g_A-dependent theoretical β spectrum — shows dramatic shape changes for g_A ∈ {0.5, 0.8, 1.0, 1.2, 1.4, 1.6, 2.0}
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- **Figure 10**: Best-fit theoretical spectrum vs. measurement
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## Limitations
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- Used CVC-fixed sNME (not ESSM) → enhanced g_A value
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- Song et al. (2025) contradicts this result using ESSM
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## References
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- [[Shape Factor C(W, g_A)]]
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- [[SSM — Spectrum Shape Method]]
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- [[Song et al. (2025)]]
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- [[Ramalho & Suhonen (2024)]]
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