Mesonic enhancement of the weak axial charge and its effect on the half-lives and spectral shapes of first-forbidden J+↔J− decays
| dc.contributor.author | Kostensalo, Joel | |
| dc.contributor.author | Suhonen, Jouni | |
| dc.date.accessioned | 2018-05-09T10:59:31Z | |
| dc.date.available | 2018-05-09T10:59:31Z | |
| dc.date.issued | 2018 | |
| dc.identifier.citation | Kostensalo, J., & Suhonen, J. (2018). Mesonic enhancement of the weak axial charge and its effect on the half-lives and spectral shapes of first-forbidden J+↔J− decays. <i>Physics Letters B</i>, <i>781</i>, 480-484. <a href="https://doi.org/10.1016/j.physletb.2018.02.053" target="_blank">https://doi.org/10.1016/j.physletb.2018.02.053</a> | |
| dc.identifier.other | CONVID_28041547 | |
| dc.identifier.other | TUTKAID_77580 | |
| dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/57911 | |
| dc.description.abstract | The effects of the enhancement of the axial-charge matrix element γ5 were studied in medium heavy and heavy nuclei for first-forbidden J+ ↔ J− decay transitions using the nuclear shell model. Noticeable dependence on the enhancement MEC of the axial-charge matrix element, as well as on the value of the axial-vector coupling constant gA was found in the spectral shapes of 93Y, 95Sr, and 97Y. The importance of the spectrum of 138Cs in the determination of gA is discussed. Half-life analyses in the A ≈ 95 and A ≈ 135 regions were done, and consistent results gA ≈ 0.90, 0.75, and 0.65, corresponding to the three enhancement scenarios MEC = 1.4, 1.7, and 2.0, were obtained. Connection to the reactor-antineutrino anomaly is pointed out. | |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | eng | |
| dc.publisher | Elsevier B.V. | |
| dc.relation.ispartofseries | Physics Letters B | |
| dc.subject.other | meson-exchange currents | |
| dc.subject.other | weak interactions | |
| dc.subject.other | nuclear medium effects | |
| dc.subject.other | forbidden beta decays | |
| dc.subject.other | spectral shape | |
| dc.title | Mesonic enhancement of the weak axial charge and its effect on the half-lives and spectral shapes of first-forbidden J+↔J− decays | |
| dc.type | article | |
| dc.identifier.urn | URN:NBN:fi:jyu-201805072485 | |
| dc.contributor.laitos | Fysiikan laitos | fi |
| dc.contributor.laitos | Department of Physics | en |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
| dc.date.updated | 2018-05-07T12:15:08Z | |
| dc.description.reviewstatus | peerReviewed | |
| dc.format.pagerange | 480-484 | |
| dc.relation.issn | 0370-2693 | |
| dc.relation.numberinseries | 0 | |
| dc.relation.volume | 781 | |
| dc.type.version | publishedVersion | |
| dc.rights.copyright | © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3. | |
| dc.rights.accesslevel | openAccess | fi |
| dc.subject.yso | ydinfysiikka | |
| dc.format.content | fulltext | |
| jyx.subject.uri | http://www.yso.fi/onto/yso/p14759 | |
| dc.relation.doi | 10.1016/j.physletb.2018.02.053 |
