A new approach to nuclear level densities: The QRPA plus boson expansion
Nuclear level densities play a key role in many nuclear applications. To go beyond the usual particle-independent approximation, a conceptually new approach based on the boson expansion of QRPA excitations is proposed. The calculated nuclear level densities are shown to follow an energy dependence c...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-08-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323003234 |
| _version_ | 1827897312103366656 |
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| author | S. Hilaire S. Goriely S. Péru G. Gosselin |
| author_facet | S. Hilaire S. Goriely S. Péru G. Gosselin |
| author_sort | S. Hilaire |
| collection | DOAJ |
| description | Nuclear level densities play a key role in many nuclear applications. To go beyond the usual particle-independent approximation, a conceptually new approach based on the boson expansion of QRPA excitations is proposed. The calculated nuclear level densities are shown to follow an energy dependence close to a constant-temperature formula at energies above a few MeV, but present a rather narrow spin distribution. They are shown to provide a quite remarkable agreement with s-wave resonance spacings and Oslo data, at least for the 48 even-even nuclei considered in the present study. |
| first_indexed | 2024-03-12T22:47:19Z |
| format | Article |
| id | doaj.art-8a4805e24d8540a79f7c0ee6fb920cba |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-03-12T22:47:19Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-8a4805e24d8540a79f7c0ee6fb920cba2023-07-21T04:58:09ZengElsevierPhysics Letters B0370-26932023-08-01843137989A new approach to nuclear level densities: The QRPA plus boson expansionS. Hilaire0S. Goriely1S. Péru2G. Gosselin3CEA, DAM, DIF, F-91297 Arpajon, France; Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, France; Corresponding author at: CEA, DAM, DIF, F-91297 Arpajon, France.Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus de la Plaine CP 226, 1050 Brussels, BelgiumCEA, DAM, DIF, F-91297 Arpajon, France; Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, FranceCEA, DAM, DIF, F-91297 Arpajon, France; Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, FranceNuclear level densities play a key role in many nuclear applications. To go beyond the usual particle-independent approximation, a conceptually new approach based on the boson expansion of QRPA excitations is proposed. The calculated nuclear level densities are shown to follow an energy dependence close to a constant-temperature formula at energies above a few MeV, but present a rather narrow spin distribution. They are shown to provide a quite remarkable agreement with s-wave resonance spacings and Oslo data, at least for the 48 even-even nuclei considered in the present study.http://www.sciencedirect.com/science/article/pii/S0370269323003234Nuclear level densityQRPA boson(n,γ) cross section |
| spellingShingle | S. Hilaire S. Goriely S. Péru G. Gosselin A new approach to nuclear level densities: The QRPA plus boson expansion Physics Letters B Nuclear level density QRPA boson (n,γ) cross section |
| title | A new approach to nuclear level densities: The QRPA plus boson expansion |
| title_full | A new approach to nuclear level densities: The QRPA plus boson expansion |
| title_fullStr | A new approach to nuclear level densities: The QRPA plus boson expansion |
| title_full_unstemmed | A new approach to nuclear level densities: The QRPA plus boson expansion |
| title_short | A new approach to nuclear level densities: The QRPA plus boson expansion |
| title_sort | new approach to nuclear level densities the qrpa plus boson expansion |
| topic | Nuclear level density QRPA boson (n,γ) cross section |
| url | http://www.sciencedirect.com/science/article/pii/S0370269323003234 |
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