Pith Number

pith:Y7S2UXYW

pith:2026:Y7S2UXYW2N7H772G4MRHVCRHWU

not attested not anchored not stored refs resolved

Nuclear charge radii of aluminium isotopes at the proton drip line

Adam Dockery, Adam Vernon, Alejandro Ortiz-Cortes, Alex Brinson, Antoine Belley, Brooke Rickey, Chandana Sumithrarachchi, Chris Izzo, Christian Ireland, Christina Jones, Dean Lee, Fabian Pastrana Cruz, Franziska Maier, Hannah Erington, Henry Sims, Jason Holt, Jonas Karthein, Jose Munoz, Julian Palmes, Kei Minamisono, Kristian K\"onig, Mason Moenter, Matthias Heinz, Nadeesha Gamage, Pierre Arthuis, Ram Yadav, Ronald Fernando Garcia Ruiz, Ryan Ringle, Scott Campbell, Serdar Elhatisari, Shane Wilkins, Shuang Zhang, Sophia Papa, Teng Wang, Ulf-G. Mei{\ss}ner, Wilfried N\"ortersh\"auser, Xiangcheng Chen, Yuan-Zhuo Ma

Laser spectroscopy reveals a step-like increase in charge radii for aluminum isotopes approaching the proton drip line.

arxiv:2605.09139 v2 · 2026-05-09 · nucl-ex · nucl-th

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y7S2UXYW2N7H772G4MRHVCRHWU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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

Our measurements reveal a step-like increase in charge radius toward the drip line, with similar radii for 22,23Al. A comparison of our results with those of their mirror partners reveals an almost identical correlation with the calculated proton skins and is consistent with the systematic trend of well-bound nuclei.

C2weakest assumption

The premise that laser spectroscopy on these short-lived, low-yield isotopes yields charge radii accurate enough to support the claimed step-like increase and mirror-partner correlation, given the experimental challenges of short lifetimes and low production rates noted in the abstract.

C3one line summary

First laser spectroscopy measurements of charge radii in Al isotopes from 25Al to 22Al reveal a step-like increase toward the proton drip line with similar radii for 22Al and 23Al, consistent with mirror-partner proton-skin trends.

References

85 extracted · 85 resolved · 2 Pith anchors

[1] Yang, X. F., Wang, S. J., Wilkins, S. G. & Garcia Ruiz, R. F. Laser spectroscopy for the study of exotic nuclei. Prog. Part. Nucl. Phys.129, 104005 (2022) 2022

[2] Koszorús, A.et al.Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character ofN= 32.Nature Phys.17, 439 (2021) 2021

[3] F.et al.Unexpectedly large charge radii of neutron-rich calcium isotopes.Nature Phys.12, 594–598 (2016) 2016

[4] Nature Phys.20, 1719–1725 (2024) 2024

[5] de Groote, R.et al.Measurement and microscopic de- scription of odd–even staggering of charge radii of exotic copper isotopes.Nature Phys.16, 620–624 (2020) 2020

Receipt and verification

First computed	2026-05-20T00:01:43.293645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7e5aa5f16d37e7fff46e3227a8a27b5089d9369cdf3502e4134d09408c7978a

Aliases

arxiv: 2605.09139 · arxiv_version: 2605.09139v2 · doi: 10.48550/arxiv.2605.09139 · pith_short_12: Y7S2UXYW2N7H · pith_short_16: Y7S2UXYW2N7H772G · pith_short_8: Y7S2UXYW

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Y7S2UXYW2N7H772G4MRHVCRHWU \
  | 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: c7e5aa5f16d37e7fff46e3227a8a27b5089d9369cdf3502e4134d09408c7978a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c2e6f9c422c153bec88f7d0cd7a69d73c5f05ea54cee1938bcdff7bd69c288f2",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "nucl-ex",
    "submitted_at": "2026-05-09T19:46:48Z",
    "title_canon_sha256": "22e9f9ae3afa28cd9409d61da1bd55fd4fbd00bfa04da6e5064031a523dc27d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.09139",
    "kind": "arxiv",
    "version": 2
  }
}