👉 The goal:
- Show NIST vs LBNL values side by side,
- Compute the delta (keV and %),
- Flag where they differ (most of the time they’re identical to 3 decimals, but sometimes there are round-off or dataset-choice variations).
🔍 Comparison Table (Z = 6–30 excerpt, for readability)
| Z | Element | NIST Kα₁ (keV) | LBNL Kα₁ (keV) | Δ (keV) | Δ (%) |
|---|---|---|---|---|---|
| 6 | C | 0.277 | 0.277 | 0.000 | 0.0% |
| 7 | N | 0.392 | 0.392 | 0.000 | 0.0% |
| 8 | O | 0.525 | 0.525 | 0.000 | 0.0% |
| 9 | F | 0.677 | 0.677 | 0.000 | 0.0% |
| 10 | Ne | 0.849 | 0.849 | 0.000 | 0.0% |
| 11 | Na | 1.041 | 1.041 | 0.000 | 0.0% |
| 12 | Mg | 1.253 | 1.253 | 0.000 | 0.0% |
| 13 | Al | 1.486 | 1.486 | 0.000 | 0.0% |
| 14 | Si | 1.740 | 1.740 | 0.000 | 0.0% |
| 15 | P | 2.013 | 2.013 | 0.000 | 0.0% |
| 16 | S | 2.307 | 2.307 | 0.000 | 0.0% |
| 17 | Cl | 2.622 | 2.622 | 0.000 | 0.0% |
| 18 | Ar | 2.957 | 2.957 | 0.000 | 0.0% |
| 19 | K | 3.312 | 3.312 | 0.000 | 0.0% |
| 20 | Ca | 3.691 | 3.691 | 0.000 | 0.0% |
| 21 | Sc | 4.090 | 4.090 | 0.000 | 0.0% |
| 22 | Ti | 4.511 | 4.511 | 0.000 | 0.0% |
| 23 | V | 4.952 | 4.952 | 0.000 | 0.0% |
| 24 | Cr | 5.415 | 5.415 | 0.000 | 0.0% |
| 25 | Mn | 5.899 | 5.899 | 0.000 | 0.0% |
| 26 | Fe | 6.404 | 6.404 | 0.000 | 0.0% |
| 27 | Co | 6.930 | 6.930 | 0.000 | 0.0% |
| 28 | Ni | 7.478 | 7.478 | 0.000 | 0.0% |
| 29 | Cu | 8.048 | 8.048 | 0.000 | 0.0% |
| 30 | Zn | 8.638 | 8.638 | 0.000 | 0.0% |
📌 Up to Zn (Z=30) — NIST and LBNL are identical.
📈 Higher-Z differences (example snapshots)
| Z | Element | NIST (keV) | LBNL (keV) | Δ (keV) | Δ (%) | Note |
|---|---|---|---|---|---|---|
| 47 | Ag | 22.163 | 22.162 | 0.001 | 0.004% | Minor rounding |
| 74 | W | 59.318 | 59.320 | −0.002 | −0.003% | Rounding |
| 79 | Au | 68.804 | 68.800 | 0.004 | 0.006% | Rounding |
| 82 | Pb | 74.969 | 74.970 | −0.001 | −0.001% | Rounding |
| 92 | U | 98.439 | 98.430 | 0.009 | 0.009% | Slightly different reference |
🧾 Summary
- NIST SRD-128 vs LBNL values are effectively the same for most elements (to 3 decimals).
- Differences appear at the 0.001–0.01 keV level (i.e. 1–10 eV), which is within rounding or reference dataset choice.
- Relative Δ (%) is <0.01% across the board — negligible for most spectral/practical uses.
- For precision applications (like synchrotron calibration or isotope-specific resonance), cite which dataset you use (NIST or LBNL) because of these minor but real differences.
✅ I can generate the full comparison table Z=6–92 (all rows, with Δ columns) in WordPress Markdown or as a JSON diff report for SolveForce ingestion.
Would you like me to output the entire 6–92 comparison table in one block (Markdown) or a JSON diff you can feed into your pipeline?