23. Hyperfine structures of 4𝑠, 5𝑠, ²𝑆₁ˌ₂ , 3𝑝 ²𝑃 ₁ˌ₂ ,₃ˌ₂ , and mixed 𝑛𝑑 𝑦²𝐷₃ˌ₂ , ₅ˌ₂ states in ²⁷Al-I
Rickey BJ, Brinson A, Chakraborty A, Dockery A, Garcia Ruiz RF, Karthein J et al.
Phys. Rev. A 113, 042824 (2026). arXiv:
* Postdoc Dr. Rickey led the experiment, analysis, and publication.
22. Precision mass measurement of 61Zn and updated 𝐹𝑡 value for conserved vector current tests
Giesel PF, Atanasov D, Blaum K, Fischer P, Karthein J et al.
Phys. Rev. C 113, 034318 (2026).
* JK performed the second analysis and co-advised the publication.
21. Commissioning the Resonant Ionization Spectroscopy Experiment at FRIB
Brinson A, Rickey BJ, Allmond JM, Dockery A, Fernandez AC, …, Karthein J et al.
Phys. Rev. Res. 8, 013276 (2026). arXiv: 2511.08881
20. Charge radii measurements of exotic tin isotopes in the proximity of N = 50 and N = 82
Gustafsson FP, Rodríguez LV, Garcia Ruiz RF, Miyagi T, Bai SW, …, Karthein J et al.
Phys. Rev. Lett. 135, 222501 (2025). arXiv: 2504.17060
19. Extending the low-𝑍 “border” of the 𝐴=100 region of deformation with precision mass spectrometry of 96−98Kr
Lunney D, Manea V, Mougeot M, Nies N, Althubiti NA, …, Karthein J et al.
Phys. Rev. C 112, 034307 (2025). arXiv: 2509.05538
18. Variations in the charge radii of indium isotopes between N = 52 and 82
Vernon A, Binnersley CL, Sahoo BK, Billowes J, Bissell ML, …, Karthein J et al.
Phys. Rev. C 111, 064325 (2025). **Editor's Suggestion**
17. Electromagnetic properties of indium isotopes elucidate the doubly magic character of 100Sn
Karthein J, Ricketts CM, Garcia Ruiz RF, Billowes J, Binnersley CL et al.
Nature Phys. 20, 1719 (2024). arXiv:2310.15093
16. Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap
Karthein J, Udrescu SM, Moroch SB, Belosevic I, Blaum K et al.
Phys. Rev. Lett. 133, 033003 (2024). arXiv:2310.11192
15. Nuclear charge radii of silicon isotopes
König K, Berengut JC, Borschevsky A, Brinson A, Brown BA, …, Karthein J, et al.
Phys. Rev. Lett. 132, 162502 (2024). arXiv:2309.02037
14. Opportunities for Fundamental Physics Research with Radioactive Molecules
Arrowsmith-Kron G, Athanasakis M, Au M, Ballof J, Berger R, …, Karthein J, et al.
Rep. Prog. Phys. 87 084301 (2024). arXiv:2302.02165
13. Isomeric Excitation Energy for 99Inm from Mass Spectrometry Reveals Constant Trend Next to Doubly Magic 100Sn
Nies L, Atanasov D, Athanasakis M, Au M, Blaum K, …, Karthein J, et al.
Phys. Rev. Lett. 131, 022502 (2023). arXiv:2306.02033
12. KATRIN background due to surface radioimpurities
Fränkle FM, Schaller A, Blaum K, Bornschein L, Drexlin G, …, Karthein J, et al.
Astropart. Phys. 102686 (2022). arXiv:2011.05107
11. Mass measurements of 99–101In challenge ab initio nuclear theory of the nuclide 100Sn
Mougeot M*, Atanasov D*, Karthein J*, Wolf RN, Ascher P, et al.
*MM, DA, and JK share first authorship for equal contributions.
Nature Phys. 17, 1099 (2021). arXiv:2109.10673
10. Analysis methods and code for very high-precision mass measurements of unstable isotopes
Karthein J, Atanasov D, Blaum K, Lunney D, Manea V, Mougeot M.
Comp. Phys. Comm. 267, 108070 (2021). arXiv:2102.10413
9. Masses of short-lived 49Sc, 50Sc, 70As, 73Br, and stable 196Hg nuclides
Kulikov I, Algora A, Atanasov D, Ascher P, Blaum K, …, Karthein J, et al.
Nucl. Phys. A 1002, 121990 (2020). arXiv:2010.15467
8. Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar
Mougeot M, Atanasov D, Barbieri C, Blaum K, Breitenfeld M, …, Karthein J, et al.
Phys. Rev. C 102, 014301 (2020). arXiv:2006.02712
7. First glimpse of the N=82 shell closure below Z=50 from masses of neutron-rich cadmium isotopes and isomers
Manea V, Karthein J, Atanasov D, Bender M, Blaum K, et al.
*VM and JK share first authorship for equal contributions.
Phys. Rev. Lett. 124, 092502 (2020). arXiv:2001.05075
6. Improved stability of multi-reflection time-of-flight mass spectrometers through passive and active voltage stabilization
Wienholtz F, Blaum K, Karthein J, Lunney D, Malbrunot-Ettenauer S et al.
Nucl. Inst. Meth. Phys. B 463, 348 (2020).
5. QEC-value determination for 21Na→21Ne and 23Mg→23Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at ISOLDE/CERN
Karthein J, Atanasov D, Blaum K, Breitenfeldt M, Bondar V et al.
Phys. Rev. C 100, 015502 (2019). arXiv:1906.01538
4. Direct decay-energy measurement as a route to the neutrino mass
Karthein J, Atanasov D, Blaum K, Eliseev S, Filianin P et al.
Hyperfine Int. 240, 61 (2019). arXiv:1905.05510
3. Long-term monitoring of the internal energy distribution of isolated cluster systems
Breitenfeldt C, Blaum K, George S, Göck J, Guzmán-Ramírez G, Karthein J, et al.
Phys. Rev. Lett. 120, 253001 (2018). arXiv:1805.11403
2. Photodissociation of an Internally Cold Beam of CH+ ions in a Cryogenic Storage Ring
O’connor AP, Becker A, Blaum K, Breitenfeldt C, George S, …, Karthein J, et al.
Phys. Rev. Lett. 116, 113002 (2016).
1. The Cryogenic Storage Ring CSR
von Hahn R, Becker A, Berg F, Blaum K, Breitenfeldt C, …, Karthein J, et al.
Rev. Sc. Instr. 87, 063115 (2016). arXiv:1606.01525
