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Lattice Calculation of the Sn Isotopes near the Proton Dripline

Fabian Hildenbrand1,*, Serdar Elhatisari2,3,†, Ulf-G. Meißner4,1,5,‡, Helen Meyer4, Zhengxue Ren6, Andreas Herten7, and Mathis Bode7

  • *Contact author: f.hildenbrand@fz-juelich.de
  • †Contact author: selhatisari@gmail.com
  • ‡Contact author: meissner@hiskp.uni-bonn.de
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Phys. Rev. Lett. 136, 062501 – Published 11 February, 2026

DOI: https://doi.org/10.1103/n7nt-s64t

Abstract

We present the first ab initio lattice calculations of the proton-rich tin isotopes Sn99 to Sn102 using nuclear lattice effective field theory with high-fidelity two- and three-nucleon forces. For a given set of three-nucleon couplings, we reproduce binding energies with ∼1% accuracy for the even–even systems and obtain energy splitting and two-nucleon separation energies in agreement with experiment. Our results confirm the N=50 shell closure and reveal that the binding energy of Sn99 lies below values extrapolated from heavier isotopes.

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Phys. Rev. Lett. 136, 062501– Published 11 February, 2026
  • Received 15 September 2025
  • Revised 15 January 2026
  • Accepted 23 January 2026
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