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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.13868 |
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| _version_ | 1866918388078477312 |
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| author | Müller, M. Althubiti, N. A. Atanasov, D. Blaum, K. Cakirli, R. B. Cocolios, T. E. Herfurth, F. Kreim, S. Lunney, D. Manea, V. Minkov, N. Neidherr, D. Rosenbusch, M. Schweikhard, L. Welker, A. Wienholtz, F. Wolf, R. N. |
| author_facet | Müller, M. Althubiti, N. A. Atanasov, D. Blaum, K. Cakirli, R. B. Cocolios, T. E. Herfurth, F. Kreim, S. Lunney, D. Manea, V. Minkov, N. Neidherr, D. Rosenbusch, M. Schweikhard, L. Welker, A. Wienholtz, F. Wolf, R. N. |
| contents | We report on high-precision mass measurements of the ground and first isomeric state of $^{75}$Zn, performed using the time-of-flight ion-cyclotron-resonance technique at the ISOLTRAP Penning-trap mass spectrometer at ISOLDE/CERN. The isomeric state was produced using in-trap decay of $^{75}$Cu. This marks the first direct investigation of the isomeric state of $^{75}$Zn via mass spectrometry. The isomer was observed at an excitation energy of 123.7(20) keV, in 2$\,σ$ agreement with the value previously determined through decay spectroscopy. In addition, our measurements correct a misassignment of the ground-state mass excess based on a previous measurement by Baruah et al., revising the value to -62681.0(21) keV. To further investigate the earlier discrepancy, we explored the spin-parity assignments of the ground and isomeric states in $^{75}$Zn using Skyrme Hartree-Fock plus Bardeen-Cooper-Schrieffer theoretical calculations, given the absence of definitive experimental data. In light of the laser spectroscopy results from Wraith et al., our results add strong evidence for a spin-1/2 ground state, which would agree with large-scale shell-model predictions as well as explaining disagreements with the Monte Carlo Shell Model. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_13868 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Mass spectrometry of $^{75}$Zn ground and isomeric states from in-trap decay of $^{75}$Cu Müller, M. Althubiti, N. A. Atanasov, D. Blaum, K. Cakirli, R. B. Cocolios, T. E. Herfurth, F. Kreim, S. Lunney, D. Manea, V. Minkov, N. Neidherr, D. Rosenbusch, M. Schweikhard, L. Welker, A. Wienholtz, F. Wolf, R. N. Nuclear Experiment We report on high-precision mass measurements of the ground and first isomeric state of $^{75}$Zn, performed using the time-of-flight ion-cyclotron-resonance technique at the ISOLTRAP Penning-trap mass spectrometer at ISOLDE/CERN. The isomeric state was produced using in-trap decay of $^{75}$Cu. This marks the first direct investigation of the isomeric state of $^{75}$Zn via mass spectrometry. The isomer was observed at an excitation energy of 123.7(20) keV, in 2$\,σ$ agreement with the value previously determined through decay spectroscopy. In addition, our measurements correct a misassignment of the ground-state mass excess based on a previous measurement by Baruah et al., revising the value to -62681.0(21) keV. To further investigate the earlier discrepancy, we explored the spin-parity assignments of the ground and isomeric states in $^{75}$Zn using Skyrme Hartree-Fock plus Bardeen-Cooper-Schrieffer theoretical calculations, given the absence of definitive experimental data. In light of the laser spectroscopy results from Wraith et al., our results add strong evidence for a spin-1/2 ground state, which would agree with large-scale shell-model predictions as well as explaining disagreements with the Monte Carlo Shell Model. |
| title | Mass spectrometry of $^{75}$Zn ground and isomeric states from in-trap decay of $^{75}$Cu |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2603.13868 |