Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei
Neutrino-nuclear responses in the form of squares of nuclear matrix elements, NMEs, are crucial for studies of neutrino-induced processes in nuclei. In this work we investigate magnetic hexadecapole (M4) NMEs in medium-heavy nuclei. The experimentally derived NMEs, MEXP(M4), deduced from observed M4...
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Wiley
2016-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2016/8417598 |
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| author | Lotta Jokiniemi Jouni Suhonen Hiroyasu Ejiri |
| author_facet | Lotta Jokiniemi Jouni Suhonen Hiroyasu Ejiri |
| author_sort | Lotta Jokiniemi |
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| description | Neutrino-nuclear responses in the form of squares of nuclear matrix elements, NMEs, are crucial for studies of neutrino-induced processes in nuclei. In this work we investigate magnetic hexadecapole (M4) NMEs in medium-heavy nuclei. The experimentally derived NMEs, MEXP(M4), deduced from observed M4 γ transition half-lives are compared with the single-quasiparticle (QP) NMEs, MQP(M4), and the microscopic quasiparticle-phonon model (MQPM) NMEs MMQPM(M4). The experimentally derived M4 NMEs are found to be reduced by a coefficient k≈0.29 with respect to MQP(M4) and by k≈0.33 with respect to MMQPM(M4). The M4 NMEs are reduced a little by the quasiparticle-phonon correlations of the MQPM wave functions but mainly by other nucleonic and nonnucleonic correlations which are not explicitly included in the MQPM. The found reduction rates are of the same order of magnitude as those for magnetic quadrupole γ transitions and Gamow-Teller (GT) and spin-dipole (SD) β transitions. The impacts of the found reduction coefficients on the magnitudes of the NMEs involved in astroneutrino interactions and neutrinoless double beta decays are discussed. |
| format | Article |
| id | doaj-art-b8c3c1fe8c4d4ba2956ab2a131e3d0c1 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
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| series | Advances in High Energy Physics |
| spelling | doaj-art-b8c3c1fe8c4d4ba2956ab2a131e3d0c12025-02-03T05:51:48ZengWileyAdvances in High Energy Physics1687-73571687-73652016-01-01201610.1155/2016/84175988417598Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy NucleiLotta Jokiniemi0Jouni Suhonen1Hiroyasu Ejiri2Department of Physics, University of Jyvaskyla, P.O. Box 35, 40014 Jyvaskyla, FinlandDepartment of Physics, University of Jyvaskyla, P.O. Box 35, 40014 Jyvaskyla, FinlandResearch Center for Nuclear Physics, Osaka University, Osaka 567-0047, JapanNeutrino-nuclear responses in the form of squares of nuclear matrix elements, NMEs, are crucial for studies of neutrino-induced processes in nuclei. In this work we investigate magnetic hexadecapole (M4) NMEs in medium-heavy nuclei. The experimentally derived NMEs, MEXP(M4), deduced from observed M4 γ transition half-lives are compared with the single-quasiparticle (QP) NMEs, MQP(M4), and the microscopic quasiparticle-phonon model (MQPM) NMEs MMQPM(M4). The experimentally derived M4 NMEs are found to be reduced by a coefficient k≈0.29 with respect to MQP(M4) and by k≈0.33 with respect to MMQPM(M4). The M4 NMEs are reduced a little by the quasiparticle-phonon correlations of the MQPM wave functions but mainly by other nucleonic and nonnucleonic correlations which are not explicitly included in the MQPM. The found reduction rates are of the same order of magnitude as those for magnetic quadrupole γ transitions and Gamow-Teller (GT) and spin-dipole (SD) β transitions. The impacts of the found reduction coefficients on the magnitudes of the NMEs involved in astroneutrino interactions and neutrinoless double beta decays are discussed.http://dx.doi.org/10.1155/2016/8417598 |
| spellingShingle | Lotta Jokiniemi Jouni Suhonen Hiroyasu Ejiri Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei Advances in High Energy Physics |
| title | Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei |
| title_full | Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei |
| title_fullStr | Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei |
| title_full_unstemmed | Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei |
| title_short | Magnetic Hexadecapole γ Transitions and Neutrino-Nuclear Responses in Medium-Heavy Nuclei |
| title_sort | magnetic hexadecapole γ transitions and neutrino nuclear responses in medium heavy nuclei |
| url | http://dx.doi.org/10.1155/2016/8417598 |
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