Precise nuclear charge radii and beyond

Jan 26, 2026, 2:40 PM → Jan 30, 2026, 3:00 PM Europe/Berlin

Zentraler Seminarraum (Max Planck Institut Kernphysik, Heidelberg)

Natalia S. Oreshkina, Fabian Heiße (MHKP)

The workshop focuses on determining nuclear radii for medium to heavy nuclei and related topics.
We aim to bring together theorists from nuclear physics, atomic physics, and QED, alongside experimentalists working with diverse techniques such as muonic atoms, scattering, and isotope shifts.
The goal is to bridge these fields and methodologies, highlight current challenges and new ideas, and continue building a broad community towards improved nuclear radii. 

Mon, January 26

3:40 PM → 5:00 PM Start: Intro and Overview

Conveners: Fabian Heiße (MHKP), Wilfried Nörtershäuser

3:40 PM Intro

Speaker: Fabian Heiße (MHKP)

4:00 PM Overview of nuclear charge radii: theory and experiment

Speaker: Wilfried Nörtershäuser

Tue, January 27

9:30 AM → 10:50 AM Theory of muonic atoms

Conveners: Natalia S. Oreshkina, Igor Valuev

9:30 AM Theory of muonic atoms I

Speaker: Natalia S. Oreshkina

10:10 AM Theory of muonic atoms II

Speaker: Igor Valuev

10:50 AM → 11:10 AM Coffee break

11:10 AM → 12:30 PM Muonic atoms experiments

Conveners: Andreas Knecht, Shikha Rathi

11:10 AM Muonic atoms experiments I

Speaker: Andreas Knecht

11:50 AM Muonic atoms experiments II

Speaker: Shikha Rathi

12:30 PM → 2:00 PM Lunch break

2:00 PM → 3:20 PM Electron scattering

Conveners: Toshimi Suda, Chandan Ghosh

2:00 PM Experimental Electron scattering I

Speaker: Toshimi Suda

2:40 PM Experimental Electron scattering II

Speaker: Chandan Ghosh

3:20 PM → 3:40 PM Coffee break

3:40 PM → 4:20 PM Electron scattering

Convener: Frederic Noël

3:40 PM Theory Electron scattering

Speaker: Frederic Noël

4:20 PM → 5:00 PM Discussion

Wed, January 28

9:30 AM → 10:50 AM Hydrogen-like, Helium-like & Lithium-like electronic systems

Conveners: Vladimir Yerokhin, Zoltan Harman

9:30 AM H-like, He-like, Li-like electronic tranistion energies

Speaker: Vladimir Yerokhin

10:10 AM H-like and Li-like bound electron g-factors

Speaker: Zoltan Harman

10:50 AM → 11:10 AM Coffee break

11:10 AM → 12:30 PM H-like, He-like, Li-like electronic experiments

Conveners: Martino Trassinelli, Philip Pfäfflein

11:10 AM H-like, He-like, Li-like electronic tranistion energies experiments I

Speaker: Martino Trassinelli

11:50 AM H-like, He-like, Li-like electronic tranistion energies experiments II

Speaker: Philip Pfäfflein

12:30 PM → 12:45 PM Workshop Photo

12:45 PM → 2:00 PM Lunch break

2:00 PM → 2:40 PM H-like, He-like, Li-like electronic experiments

Convener: Fabian Heiße

2:00 PM Bound electron g-factor experiments

Speaker: Fabian Heiße

2:40 PM → 3:20 PM Nuclear ab-initio theory

Convener: Matthias Heinz

2:40 PM Nuclear ab-initio theory

Speaker: Matthias Heinz

3:20 PM → 3:40 PM Coffee break

3:40 PM → 5:20 PM Poster session

3:40 PM The impact of atomic theory calculations on charge radii from isotope shift measurements

Speaker: Julian Palmes

3:45 PM Towards a direct g-factor difference measurement of 12,14C5+

Speaker: Max Anton Gramberg

3:50 PM Towards high-precision laser spectroscopy of trapped radioactive ions

Speaker: Phillip Imgram

3:55 PM Electron scattering at low energy on radioactive isotopes using EBIT

Speaker: Sophie Le Carlier de Veslud

4:00 PM Ultra precise isotope shifts of stable elements

Speaker: Rohan Chakravarthy

4:05 PM Vacuum Polarization Corrections for Muonic Systems

Speaker: Zoia Mandrykina

4:10 PM High Precision X-Ray Spectroscopy utilising Metallic Magnetic Calorimeters

Speaker: Johanna Hanke Walch

4:15 PM Nuclear charge radii of Thallium Isotopes and trends in the neutron deficient Lead region

Speaker: Edward Matthews

4:20 PM Hyper-EBIT: The development of a source for very highly charged ions

Speaker: Luca Yannik Geißler

Thu, January 29

9:30 AM → 10:50 AM Isotope shifts

Conveners: Emily Burbach, Liss Vazquez Rodriguez

9:30 AM Isotope shifts of stable elements

Speaker: Emily Burbach

10:10 AM Isotope shifts of unstable elements

Speaker: Liss Vazquez Rodriguez

10:50 AM → 11:10 AM Coffee break

11:10 AM → 12:30 PM Spin-polarised unstable nuclei: from fundamental interactions, via nuclear structure, to biology and material studies

Convener: Magdalena Kowalska

12:30 PM → 2:00 PM Lunch break

2:00 PM → 3:20 PM Isotope shifts

Conveners: Klaus Blaum, José R. Crespo López-Urrutia

2:00 PM High precision mass measurements

Speaker: Klaus Blaum

2:40 PM EBIT measurements

Speaker: José R. Crespo López-Urrutia

3:20 PM → 3:40 PM Coffee break

3:40 PM → 5:00 PM Poster session

Fri, January 30

9:30 AM → 10:50 AM Antiprotonic atoms theory & experiments

Conveners: Jonas Sommerfeldt, Alexandre Obertelli

9:30 AM Theory of antiprotonic atoms

Speaker: Jonas Sommerfeldt

10:10 AM Antiprotonic atom experiments

Speaker: Alexandre Obertelli

10:50 AM → 11:10 AM Coffee break

11:10 AM → 11:50 AM Beyond: new approaches

Convener: Jacinda Ginges

11:10 AM Theory of nuclear charge and magnetization distribution

Speaker: Jacinda Ginges

11:50 AM → 12:30 PM Discussion

12:30 PM → 2:00 PM Lunch break

2:00 PM → 3:00 PM Closing remarks

Conveners: Natalia S. Oreshkina, Fabian Heiße (MHKP)