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refactor: centralize all physical constants in constants.py, fix unit naming

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- Add EULER_GAMMA, ME_KEV, R0_FM to constants.py
- Replace hardcoded 0.511, 0.5772..., 1.2 with imports from constants
- Fix T_to_W parameter name: T_kev -> T_MeV (it takes MeV, not keV)
- Remove duplicate ME_ME from spectrum.py (import ME_MEV from constants)
- Remove hardcoded r_0 from detector_response.py and radiative.py
- Update CONVENTIONS.md to reference correct constant names
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unzhakov
2026-05-01 22:34:15 +03:00
parent 6a671bfb8b
commit 8b4545fe3e
6 changed files with 28 additions and 18 deletions
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beta_spectrum/constants.py
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@@ -1,5 +1,8 @@
# constants.py
ALPHA = 1 / 137.035999084 # fine-structure constant
EULER_GAMMA = 0.57721566490153286 # Euler-Mascheroni constant
HBAR_C_MEV_FM = 197.3269804 # MeV * fm
ME_MEV = 0.510998950 # MeV / c^2
MP_MEV = 938.272088816 # MeV / c^2
ME_MEV = 0.510998950 # electron rest mass in MeV / c^2
ME_KEV = ME_MEV * 1000.0 # electron rest mass in keV
MP_MEV = 938.272088816 # proton rest mass in MeV / c^2
R0_FM = 1.2 # nuclear radius parameter in fm