Precision β-delayed charged-particle emission spectroscopy at FRIB: Proof of principle with the β-decay of 25Si
Abstract
We report on the β-delayed proton and γ-ray emission from 25Si, measured at the Facility for Rare Isotope Beams (FRIB). Low-energy 25Si ions extracted from the Advanced Cryogenic Gas Stopper were implanted into a thin carbon foil surrounded by a compact, highly segmented array of silicon detector telescopes and two high-purity germanium detectors. This setup provides high-resolution charged-particle spectroscopy, establishing a proof of principle for precision stopped-beam decay studies at FRIB. We reconstruct the 25Si decay scheme, resolving new high-energy proton transitions and determining the feeding to excited states in 24Mg. The observation of spectral interference patterns enables firm spin and parity assignments for highly excited states in 25Al. The 25Si β-strength distribution is extracted and compared with large-scale shell-model calculations.
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BibTeX
@misc{jensen2026precision,
title = {{Precision $β$-delayed charged-particle emission spectroscopy at FRIB: Proof of principle with the $β$-decay of $^25\mathrmSi$}},
author = {E. A. M. Jensen and J. M. Eder and P. H. Pedersen and A. Adams and M. J. G. Borge and B. A. Brown and J. Dopfer and H. O. U. Fynbo and B. S. O. Johansson and B. Jonson and M. Madurga and J. S. Nielsen and K. Riisager and C. S. Sumithrarachchi and L. J. Sun and O. Tengblad and L. E. Weghorn and T. Wheeler and C. Wrede},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.07799},
eprint = {2609.07799},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.07799},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Precision β-delayed charged-particle emission spectroscopy at FRIB: Proof of principle with the β-decay of ^25Si
AU - E. A. M. Jensen
AU - J. M. Eder
AU - P. H. Pedersen
AU - A. Adams
AU - M. J. G. Borge
AU - B. A. Brown
AU - J. Dopfer
AU - H. O. U. Fynbo
AU - B. S. O. Johansson
AU - B. Jonson
AU - M. Madurga
AU - J. S. Nielsen
AU - K. Riisager
AU - C. S. Sumithrarachchi
AU - L. J. Sun
AU - O. Tengblad
AU - L. E. Weghorn
AU - T. Wheeler
AU - C. Wrede
PY - 2026
DA - 2026/09/07
PB - arXiv
DO - 10.48550/arxiv.2609.07799
UR - https://arxiv.org/abs/2609.07799
AB - We report on the β-delayed proton and γ-ray emission from ^25Si, measured at the Facility for Rare Isotope Beams (FRIB). Low-energy ^25Si ions extracted from the Advanced Cryogenic Gas Stopper were implanted into a thin carbon foil surrounded by a compact, highly segmented array of silicon detector telescopes and two high-purity germanium detectors. This setup provides high-resolution charged-particle spectroscopy, establishing a proof of principle for precision stopped-beam decay studies at FRIB. We reconstruct the ^25Si decay scheme, resolving new high-energy proton transitions and determining the feeding to excited states in ^24Mg. The observation of spectral interference patterns enables firm spin and parity assignments for highly excited states in ^25Al. The ^25Si β-strength distribution is extracted and compared with large-scale shell-model calculations.
ER -