Pith Number

pith:BMIWD2P5

pith:2026:BMIWD2P5VLADLU466F3D5PXMWU

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Nuclear Charge Radii of Sr Isotopes: Reevaluation based on Transition Frequency Measurements in the $5s-5p-4d$ manifold in Sr$^+$

A. Candiello, A. Dorne, B. K. Sahoo, B. Ohayon, H. Bodnar, I. Lopp, J. Palmes, K. K\"onig, P. Imgram, P. M\"uller, R. de Groote, R. Van Duyse, W. N\"ortersh\"auser

Nuclear charge radii of Sr isotopes above N=50 depend strongly on the extraction method used.

arxiv:2605.04281 v2 · 2026-05-05 · physics.atom-ph · nucl-ex

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Claims

C1strongest claim

We show that in the region above N=50, the charge radii are strongly dependent on the approach being used.

C2weakest assumption

That the compared techniques (King plots with experimental input versus ab initio atomic structure calculations) are free of significant unaccounted systematic effects in separating field and mass shifts for the Sr+ transitions.

C3one line summary

New Sr+ transition frequency data reveals that extracted nuclear charge radii above N=50 vary significantly with the choice of King-plot versus ab initio methods.

Receipt and verification

First computed	2026-06-01T01:03:54.391530Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b1161e9fdaac035d39ef1763ebeecb5003a5936407c61b0f316f54c971f0159

Aliases

arxiv: 2605.04281 · arxiv_version: 2605.04281v2 · doi: 10.48550/arxiv.2605.04281 · pith_short_12: BMIWD2P5VLAD · pith_short_16: BMIWD2P5VLADLU46 · pith_short_8: BMIWD2P5

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/BMIWD2P5VLADLU466F3D5PXMWU \
  | 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: 0b1161e9fdaac035d39ef1763ebeecb5003a5936407c61b0f316f54c971f0159

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab6fa47a5bb1528c9792709ba5c3adfdc0c5af37cabd137ca8de75d753187113",
    "cross_cats_sorted": [
      "nucl-ex"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2026-05-05T20:31:53Z",
    "title_canon_sha256": "28f24d9f0de7f04379ad714bc72550b583294e18aa721f7b798bc72814536df7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.04281",
    "kind": "arxiv",
    "version": 2
  }
}