 unzhakov
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caa4a77ebd
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fix: correct energy calibration from Am-241 peaks
- Am-241 peaks at ch 134=13.8, ch 163=17.8, ch 218=26.3 keV
- Calibration: E = 0.397 + 0.0995 × ch (previously wrong)
- Kurie fit endpoint 425 keV vs Q=297.5 keV — spectrum extends
beyond MCA range (407 keV), simple extrapolation unreliable
- Proper endpoint extraction requires theory model + detector
convolution (fitter module), not simple Kurie plot
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2026-05-18 00:01:28 +03:00 |
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unzhakov
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5f70e3a15a
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feat: add raw binary spectrum reader and data quality analysis
- exp_data/raw_reader.py: read binary MCA spectra (128-byte header,
int32 counts), subtract cumulative spectra, Am-241 calibration
- exp_data/spectrum.py: allow negative counts for difference spectra
- scripts/analyze_raw.py: analyze 236 individual runs from cumulative
data, compute rates and endpoint drift
- Am-241 calibration: E = -0.96 + 0.451 * ch (CAM1),
E = 0.75 + 0.442 * ch (CAM2)
- Results: stable rate ~2M counts/run, stable endpoint ~374 keV
(smeared Q-value), spike at runs 214-219 (acquisition glitch)
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2026-05-17 22:55:52 +03:00 |
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