ACTINV data v1.0.0

ACTINV data v1.0.0

This is ACTINV's first immutable, ready-to-use nuclear-data release. It is separate from the software release: install
an ACTINV v1.0.0 standalone command, then let its embedded catalog select and verify only the files you need.

actinv data list
actinv data fetch
actinv data verify

The default tendl-2025-neutron bundle downloads about 139 MiB and installs the exact P10 TENDL-2025 709-group
neutron activation library plus primary ENDF/B-VIII.0 and fallback JEFF-3.3 decay data. The decay archives come
directly from the IAEA and are not assets on this release. Optional bundles provide the matching complete P11 MF=33
neutron covariance sidecar and the P10 proton, deuteron, or alpha 162-group activation libraries.

Every direct asset, official archive, and extracted decay payload has a frozen byte count and SHA-256 in
actinv-data-catalog-v1.0.0.json. Downloads are streamed, bounded, verified, and published atomically. SHA256SUMS
and SIZES cover every attached payload and the catalog. Files are installed under a versioned directory and are
never silently updated.

The processed TENDL-2025 assets are distributed under the CC-BY-4.0 declaration in their source evaluations. See
ACTINV-DATA-NOTICE-v1.0.0.md for creators, citation, source identities, transformations, the two recorded Pb-208
repairs, and the separation between data terms and ACTINV's MIT/Apache-2.0 software licence.

ACTINV and these data remain research-grade. A verified download proves file identity, not fitness for a particular
material, spectrum, safety case, or regulatory use. See the repository's qualification boundary and validation record
before relying on results in a controlled analysis chain.