Pith Number

pith:32XY5GDZ

pith:2026:32XY5GDZGS5VLP6PBXP2B2ZJHI

not attested not anchored not stored refs resolved

Gamma-ray Signatures of r-Process Radioactivity from the Collapse of Magnetized White Dwarfs

Daniel Kasen, David Radice, Tetyana Pitik, Yong-Zhong Qian

Accretion-induced collapse of magnetized white dwarfs produces both r-process and iron-peak gamma-ray lines, unlike neutron star mergers.

arxiv:2603.08792 v2 · 2026-03-09 · astro-ph.HE · nucl-th

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

The simultaneous presence of r-process and iron-peak gamma-ray lines is distinctive of AIC ejecta and absent in binary neutron star mergers, where iron-peak nuclei are generally not synthesized.

C2weakest assumption

The 2D GR neutrino-MHD simulation plus subsequent radiation-hydrodynamics evolution accurately captures the ejecta composition, velocity structure, and r-process yields without significant 3D effects or nuclear data uncertainties that would alter the predicted line fluxes.

C3one line summary

Simulations predict time-dependent gamma-ray lines from r-process and iron-peak decays in accretion-induced white dwarf collapse, detectable to ~10 Mpc and absent in neutron star mergers.

References

54 extracted · 54 resolved · 13 Pith anchors

[1] Between∼1 and10d, 132I accounts for∼60–70% of the total gamma-ray output, sustained by secular equilib- rium with its parent132Te (t1/2 = 3.2d)

[2] The gamma-ray spectra exhibit well-resolved emis- sionfeaturesfromr-process– 132I, 131I, 132Te, 133Xe, and others–that provide unambiguous signatures of neutron-rich nucleosynthesis

[3] Atd= 10 Mpc, the brightest r-process lines remain detectable by GammaTPC and GRAMS, and are marginally above the e- ASTROGAM threshold

[4] 4), demonstrating that the long expo- suretimesrequiredbygamma-raytelescopesdonot wash out the isotopic signatures

[5] The gamma-ray energy budget is dominated by io- dine (Z= 53), which contributes∼40% of the to- tal escaping gamma-ray energy despite comprising only∼5% of the ejecta mass (Fig. 5). The to- tal time-in

Formal links

1 machine-checked theorem link

Cited by

1 paper in Pith

The early r-process nucleosynthesis scenarios

Receipt and verification

First computed	2026-05-18T03:09:22.868330Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

deaf8e987934bb55bfcf0ddfa0eb293a246a688066350836039b32e87d7fcd69

Aliases

arxiv: 2603.08792 · arxiv_version: 2603.08792v2 · doi: 10.48550/arxiv.2603.08792 · pith_short_12: 32XY5GDZGS5V · pith_short_16: 32XY5GDZGS5VLP6P · pith_short_8: 32XY5GDZ

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/32XY5GDZGS5VLP6PBXP2B2ZJHI \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: deaf8e987934bb55bfcf0ddfa0eb293a246a688066350836039b32e87d7fcd69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcfc3d584a0bb2aebcf5894e9f7dd2a270b7ad556dda91011ff0a9068b4bdbe2",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2026-03-09T18:00:08Z",
    "title_canon_sha256": "c5d678717ccf31d788186cd1b8d7ea50a6d3121fcb752c1df43c39afe8679de5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.08792",
    "kind": "arxiv",
    "version": 2
  }
}