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Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes

The unmixed intruder configurations (2p-2h) were studied for (31)'(33)'Na-35 isotopes inside the island of inversion within the SDPF-U Hamiltonian with restrictions. The proton's positions that give a good correlation energy were determined for the first time. The unmixed intruder con...

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Main Authors: Ahmed, Firas A., Abu Kassim, Hasan, Al-Sammarraie, Anwer A., Sharrad, Fadhil, Garba, Lurwan G.
Format: Article
Published: 2022
Subjects:
QC Physics
Online Access:http://eprints.um.edu.my/41992/
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spelling my.um.eprints.419922023-10-18T08:03:44Z http://eprints.um.edu.my/41992/ Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes Ahmed, Firas A. Abu Kassim, Hasan Al-Sammarraie, Anwer A. Sharrad, Fadhil Garba, Lurwan G. QC Physics The unmixed intruder configurations (2p-2h) were studied for (31)'(33)'Na-35 isotopes inside the island of inversion within the SDPF-U Hamiltonian with restrictions. The proton's positions that give a good correlation energy were determined for the first time. The unmixed intruder configurations (2p-2h), in addition of the proton's positions, were found using the restriction technique. The proposed restricted configurations were applied to calculate the low-lying states and probabilities of the transitions B(E2 : 0(1)(+) -> 2(1)(+)) with effective charges e(p) = 1.3e and e(n) = 0.537e for the Na-31,Na-33,Na-35 isotopes. Moreover, the outcomes of this work compared reasonable well to the available experimental results. The good agreement between the theoretical and the experimental values, especially for the first three positive states 3/2, 5/2 and 7/2, confirmed the domination of unmixed (2p_2h) intruder configurations in the ground states for these nuclei. On the basis of this agreement, two positive states (9/2, 1/2) are suggested in this paper. Furthermore, the theoretical results showed the accuracy of SDPF-U Hamiltonian in calculations for this region (N=20). 2022-06 Article PeerReviewed Ahmed, Firas A. and Abu Kassim, Hasan and Al-Sammarraie, Anwer A. and Sharrad, Fadhil and Garba, Lurwan G. (2022) Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes. Journal of the Korean Physical Society, 80 (12). pp. 1098-1106. ISSN 0374-4884, DOI https://doi.org/10.1007/s40042-022-00466-2 <https://doi.org/10.1007/s40042-022-00466-2>. 10.1007/s40042-022-00466-2
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
spellingShingle QC Physics
Ahmed, Firas A.
Abu Kassim, Hasan
Al-Sammarraie, Anwer A.
Sharrad, Fadhil
Garba, Lurwan G.
Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
description The unmixed intruder configurations (2p-2h) were studied for (31)'(33)'Na-35 isotopes inside the island of inversion within the SDPF-U Hamiltonian with restrictions. The proton's positions that give a good correlation energy were determined for the first time. The unmixed intruder configurations (2p-2h), in addition of the proton's positions, were found using the restriction technique. The proposed restricted configurations were applied to calculate the low-lying states and probabilities of the transitions B(E2 : 0(1)(+) -> 2(1)(+)) with effective charges e(p) = 1.3e and e(n) = 0.537e for the Na-31,Na-33,Na-35 isotopes. Moreover, the outcomes of this work compared reasonable well to the available experimental results. The good agreement between the theoretical and the experimental values, especially for the first three positive states 3/2, 5/2 and 7/2, confirmed the domination of unmixed (2p_2h) intruder configurations in the ground states for these nuclei. On the basis of this agreement, two positive states (9/2, 1/2) are suggested in this paper. Furthermore, the theoretical results showed the accuracy of SDPF-U Hamiltonian in calculations for this region (N=20).
format Article
author Ahmed, Firas A.
Abu Kassim, Hasan
Al-Sammarraie, Anwer A.
Sharrad, Fadhil
Garba, Lurwan G.
author_facet Ahmed, Firas A.
Abu Kassim, Hasan
Al-Sammarraie, Anwer A.
Sharrad, Fadhil
Garba, Lurwan G.
author_sort Ahmed, Firas A.
title Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
title_short Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
title_full Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
title_fullStr Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
title_full_unstemmed Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes
title_sort shell model calculations of the nuclear structure in the ``island of inversion'' n=20 region: na-31,na-33,na-35 isotopes
publishDate 2022
url http://eprints.um.edu.my/41992/
_version_ 1781704580177854464
score 13.211869

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