unzhakov
f04f52b747
Add support for proper calculation of phase space component based on the transition type (allowed/Nth order forbidden).
38 lines
857 B
Python
38 lines
857 B
Python
# utils.py
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import numpy as np
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from .constants import HBAR_C_MEV_FM, ME_MEV
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def nuclear_radius(A: float, r0: float = 1.2) -> float:
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r0_fm = 1.2 # fm
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R_fm = r0_fm * A ** (1 / 3)
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return R_fm / (HBAR_C_MEV_FM / ME_MEV)
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def momentum(W, rest_mass: float = 1):
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"""
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Helper function to get momentum value from energy.
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Args:
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W np.ndarray: Array of full particle energy values in natural units
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rest_mass float: rest mass of the particle in taural units (m_e = 1 by default for electron)
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Returns:
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np.ndarray: array of particle momentum values.
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"""
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return np.sqrt(W**2 - rest_mass**2)
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def neutrino_energy(W, W0):
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return W0 - W
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def W_to_T(W: float | np.ndarray) -> np.ndarray:
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return (W - 1.0) * ME_MEV
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def T_to_W(T_keV: float | np.ndarray) -> np.ndarray:
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return T_keV / ME_MEV + 1.0
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