# LIB2-163 — The separation-energy rule uses the refined daughter ledger

- class: CLAIM · review_state: IN_REVIEW · house_tier: not yet assigned
- labels as printed: math_status NOT_PRINTED · attachment NOT_PRINTED · scorecard tier word none (PDF p.130)
- basis: {"pdf_sha256_prefix": "b64ddcd9e16a6dcd", "release": "Rev33.1_S369"}

## Statement

The banked separation-energy rule is Sx(P → D + x) = B(P) − B(Dledger) − B(x), with the refined daughter always and B(x) = 0 for a single emitted nucleon; neutral excitations cancel only when present in both typings.

## Caution

The convention does not supply the missing parent-excitation typing or resolve the exposed charge-magnitude defects.

## Primary source

Paper 9, §7, Banked baseline ruling, PDF p.134: "Sx (P → D + x) = B(P ) − B(Dledger ) − B(x) with the refined daughter always, where B(x) = 0 for a single emitted nucleon (the case the ruling was banked for) and the bound-fragment term is required otherwise (8 Be→ αα gives 0 at leading order only with it; Rev32.9, A1674 F01; Rev32.10, A1714-F01 — this does not license the open A = 8 alternative baseline)"

## Machine

- url: /library-v2/LIB2-163/
- content_sha256: 82c9e8ca922fd5737d5301798a0e35d47d5484f7098d8bc023771e8b2705fccd
- candidate_ids: C2-072

## Freshness

- BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02
- Declared volatile fields (R36): BUILD_STAMP