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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/2604.18287 |
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| _version_ | 1866917422838054912 |
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| author | Lange, D. Atanasov, D. Au, M. Belley, A. Benhatchi, M. Blaum, K. Cakirli, R. B. Giesel, P. F. Herlert, A. Holt, J. D. Hu, B. S. Jaries, A. Klink, C. Litvinov, Yu. A. Lunney, D. Manea, V. Mehlhorn, F. Miyagi, T. Mougeot, M. Naimi, S. Nies, L. Schlaich, M. Schweiger, Ch. Schweikhard, L. Shickele, T. Todd, A. Wojtaczka, W. |
| author_facet | Lange, D. Atanasov, D. Au, M. Belley, A. Benhatchi, M. Blaum, K. Cakirli, R. B. Giesel, P. F. Herlert, A. Holt, J. D. Hu, B. S. Jaries, A. Klink, C. Litvinov, Yu. A. Lunney, D. Manea, V. Mehlhorn, F. Miyagi, T. Mougeot, M. Naimi, S. Nies, L. Schlaich, M. Schweiger, Ch. Schweikhard, L. Shickele, T. Todd, A. Wojtaczka, W. |
| contents | We present the first determination of the $N = 50$ empirical shell gap at $Z = 48$ by precise mass measurements of the neutron-deficient cadmium isotopes $^{96-98}$Cd with the ISOLTRAP mass spectrometer at ISOLDE-CERN, including the first precise determination of the excitation energy of the $25/2^+$ isomer in $^{97}$Cd. Through the systematics of Coulomb Displacement Energies, we further deduce the empirical shell gap in the higher-$Z$ isotopic chains, tightly constraining the $^{100}$Sn mass-surface region. The new experimental data suggest an enhancement of the gap towards $^{100}$Sn, which is discussed in comparison to state-of-the-art calculations using energy-density functional and new ab initio approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18287 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Constraining the trend of the $N = 50$ shell gap towards $^{100}$Sn with the masses of $^{96-98}$Cd Lange, D. Atanasov, D. Au, M. Belley, A. Benhatchi, M. Blaum, K. Cakirli, R. B. Giesel, P. F. Herlert, A. Holt, J. D. Hu, B. S. Jaries, A. Klink, C. Litvinov, Yu. A. Lunney, D. Manea, V. Mehlhorn, F. Miyagi, T. Mougeot, M. Naimi, S. Nies, L. Schlaich, M. Schweiger, Ch. Schweikhard, L. Shickele, T. Todd, A. Wojtaczka, W. Nuclear Experiment Nuclear Theory We present the first determination of the $N = 50$ empirical shell gap at $Z = 48$ by precise mass measurements of the neutron-deficient cadmium isotopes $^{96-98}$Cd with the ISOLTRAP mass spectrometer at ISOLDE-CERN, including the first precise determination of the excitation energy of the $25/2^+$ isomer in $^{97}$Cd. Through the systematics of Coulomb Displacement Energies, we further deduce the empirical shell gap in the higher-$Z$ isotopic chains, tightly constraining the $^{100}$Sn mass-surface region. The new experimental data suggest an enhancement of the gap towards $^{100}$Sn, which is discussed in comparison to state-of-the-art calculations using energy-density functional and new ab initio approaches. |
| title | Constraining the trend of the $N = 50$ shell gap towards $^{100}$Sn with the masses of $^{96-98}$Cd |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2604.18287 |