In-beam $γ-$spectroscopy of the transitional nucleus $^{217}$Ac
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Sahoo, Dhananjaya Deo, A. Y. Madhu Yadav, Khamosh Tiwary, S. S. Srivastava, P. C. Palit, R. Tandel, S. K. Kumar, Anil Dey, P. Das, Biswajit Malik, Vishal Kundu, A. Sindhu, A. Jadhav, S. V. Naidu, B. S. Thomas, A. V. |
| author_facet | Sahoo, Dhananjaya Deo, A. Y. Madhu Yadav, Khamosh Tiwary, S. S. Srivastava, P. C. Palit, R. Tandel, S. K. Kumar, Anil Dey, P. Das, Biswajit Malik, Vishal Kundu, A. Sindhu, A. Jadhav, S. V. Naidu, B. S. Thomas, A. V. |
| contents | High-spin states in the transitional $^{217}$Ac nucleus are established up to 3.8 MeV excitation energy and $I^π =$ 41/2$^+$ with the addition of around 20 new transitions. The structure of the yrast and near-yrast states below the 29/2$^+$ isomer is revisited. The inconsistencies in the level schemes reported earlier are resolved. The level structure above the 29/2$^+$ isomer is established for the first time. Large-basis shell-model calculations with the KHPE interaction are performed to compare the experimentally observed level energies with the theoretical predictions. A comparison with the systematics of the N = 128 isotones suggests that the yrast structures result from a weak coupling of the odd proton to the even-even 216Ra core, which is consistent with the shell-model configurations. Furthermore, alpha decay of the 29/2$^+$ isomer is revisited and the decay scheme established from this work is discussed in the framework of the shell model. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_13856 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | In-beam $γ-$spectroscopy of the transitional nucleus $^{217}$Ac Sahoo, Dhananjaya Deo, A. Y. Madhu Yadav, Khamosh Tiwary, S. S. Srivastava, P. C. Palit, R. Tandel, S. K. Kumar, Anil Dey, P. Das, Biswajit Malik, Vishal Kundu, A. Sindhu, A. Jadhav, S. V. Naidu, B. S. Thomas, A. V. Nuclear Experiment Nuclear Theory High-spin states in the transitional $^{217}$Ac nucleus are established up to 3.8 MeV excitation energy and $I^π =$ 41/2$^+$ with the addition of around 20 new transitions. The structure of the yrast and near-yrast states below the 29/2$^+$ isomer is revisited. The inconsistencies in the level schemes reported earlier are resolved. The level structure above the 29/2$^+$ isomer is established for the first time. Large-basis shell-model calculations with the KHPE interaction are performed to compare the experimentally observed level energies with the theoretical predictions. A comparison with the systematics of the N = 128 isotones suggests that the yrast structures result from a weak coupling of the odd proton to the even-even 216Ra core, which is consistent with the shell-model configurations. Furthermore, alpha decay of the 29/2$^+$ isomer is revisited and the decay scheme established from this work is discussed in the framework of the shell model. |
| title | In-beam $γ-$spectroscopy of the transitional nucleus $^{217}$Ac |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2405.13856 |