# 📐 L2 Spec — Gamma-Ray Shielding — deep-penetration attenuation Mismatch-Only Spec
**ID:** `L2-361-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-361`](/artifact/l1/L1-361)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554106
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 16 – 1024 |
| W | px | 16 – 1024 |
| Z | — | 16 – 1024 |
| Snr db | dB | 0 – 40 |
| Mu error | — | 0.0 – 0.05 |
| N energies | — | 1 – 200 |
| N detectors | — | 1 – 256 |
| Geometry error | — | 0.0 – 0.05 |
| Buildup factor error | — | 0.0 – 0.3 |
| Source spectrum error | — | 0.0 – 0.2 |
## 2. Tolerance (ε)
**Type:** `fn`
```
1.5 + 30.0*mu_error + 10.0*buildup_factor_error + 15.0*geometry_error + 8.0*source_spectrum_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`330921397363421ee0e7ae639391536780fe36aa4263339df4639246dfedd86c`
## 5. On-chain Registration
- **Chain hash:** `0x769bd58b67c8b5f09ad26657ab42c7aa51b6d54521c9664dc9cecb2723e20323`
- **Chain tx hash:** `0x062b904e326a7d1725adadcacf1433c058c04dba88898a70c4a8a1c964050c71`
- **Chain block:** `41554106`
---
## File Mapping
This bundle consists of: `L2-361-001.md`, `L2-361-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-361-001.md` | Source of truth — edit this | Human or LLM |
| `L2-361-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-361-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._