Balraj Singh , M.S. Basunia , Jun Chen , P. Dimitriou , B.M.S. Amro , S. Basu , S. Das , Diwanshu , A. Karmakar , M.J. Lazaric , S.R. Leblond , S.S. Nayak , C. Ngwetsheni , A. Rathi , P.S. Rawat , B. Rohila , V. Vallet
{"title":"A = 222等压线的核结构和衰变数据","authors":"Balraj Singh , M.S. Basunia , Jun Chen , P. Dimitriou , B.M.S. Amro , S. Basu , S. Das , Diwanshu , A. Karmakar , M.J. Lazaric , S.R. Leblond , S.S. Nayak , C. Ngwetsheni , A. Rathi , P.S. Rawat , B. Rohila , V. Vallet","doi":"10.1016/j.nds.2023.10.002","DOIUrl":null,"url":null,"abstract":"<div><p>Evaluated data are presented for 11 known <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> nuclides (Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, and Np), and relevant J<sup><em>π</em></sup> and T<sub>1/2</sub> data for <span><math><mi>A</mi><mo>=</mo><mn>226</mn></math></span> nuclei decaying by <em>α</em>-decay to <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> nuclei. For <sup>222</sup>Bi, only the isotopic identification is established with no measurement of its half-life. For <sup>222</sup>Po, <sup>222</sup>At, <sup>222</sup>Fr, <sup>222</sup>U, and <sup>222</sup>Np, data are available only for the ground states, with static magnetic dipole and electric quadrupole moments, and charge radius measurements for the <sup>222</sup>Fr ground state. For <sup>222</sup>Ac and <sup>222</sup>Pa, two low-lying levels are known from <sup>226</sup>Pa <em>α</em> decay, and <sup>226</sup>Np decay, respectively, but with no information about J<sup><em>π</em></sup> assignments and <em>γ</em> decays of these levels. For <sup>222</sup>Pa, a long-lived isomeric state is known, decaying dominantly by <em>α</em> decay. <sup>222</sup>Rn, <sup>222</sup>Ra, and <sup>222</sup>Th have been investigated in detail, the low-spin states by <em>α</em> decay and the high-spin studies of ground-state and octupole bands by in-beam <em>γ</em>-ray studies for all the three nuclei, as well as by Coulomb excitation for <sup>222</sup>Rn and <sup>222</sup>Ra. Low-spin levels in <sup>222</sup>Ra have been investigated also through the <span><math><msup><mrow><mi>β</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> decay of <sup>222</sup>Fr. Half-lives of the excited states are known for 7 levels in <sup>222</sup>Rn, 12 levels in <sup>222</sup>Ra, and 3 levels in <sup>222</sup>Th. Octupole deformations, with the presence of alternating-parity bands up to (16<sup>+</sup>) and (<span><math><msup><mrow><mn>21</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Rn, (20<sup>+</sup>) and (<span><math><msup><mrow><mn>19</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Ra, and (26<sup>+</sup>) and (<span><math><msup><mrow><mn>25</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Th, and with interband E1 transitions, have been established in these three nuclei. The present evaluation supersedes the previous <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> ENSDF evaluations: (2011Si24), (1996El01), (1987El06) and (1977To14).</p></div>","PeriodicalId":49735,"journal":{"name":"Nuclear Data Sheets","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Nuclear Structure and Decay Data for A = 222 Isobars\",\"authors\":\"Balraj Singh , M.S. Basunia , Jun Chen , P. Dimitriou , B.M.S. Amro , S. Basu , S. Das , Diwanshu , A. Karmakar , M.J. Lazaric , S.R. Leblond , S.S. Nayak , C. Ngwetsheni , A. Rathi , P.S. Rawat , B. Rohila , V. Vallet\",\"doi\":\"10.1016/j.nds.2023.10.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Evaluated data are presented for 11 known <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> nuclides (Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, and Np), and relevant J<sup><em>π</em></sup> and T<sub>1/2</sub> data for <span><math><mi>A</mi><mo>=</mo><mn>226</mn></math></span> nuclei decaying by <em>α</em>-decay to <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> nuclei. For <sup>222</sup>Bi, only the isotopic identification is established with no measurement of its half-life. For <sup>222</sup>Po, <sup>222</sup>At, <sup>222</sup>Fr, <sup>222</sup>U, and <sup>222</sup>Np, data are available only for the ground states, with static magnetic dipole and electric quadrupole moments, and charge radius measurements for the <sup>222</sup>Fr ground state. For <sup>222</sup>Ac and <sup>222</sup>Pa, two low-lying levels are known from <sup>226</sup>Pa <em>α</em> decay, and <sup>226</sup>Np decay, respectively, but with no information about J<sup><em>π</em></sup> assignments and <em>γ</em> decays of these levels. For <sup>222</sup>Pa, a long-lived isomeric state is known, decaying dominantly by <em>α</em> decay. <sup>222</sup>Rn, <sup>222</sup>Ra, and <sup>222</sup>Th have been investigated in detail, the low-spin states by <em>α</em> decay and the high-spin studies of ground-state and octupole bands by in-beam <em>γ</em>-ray studies for all the three nuclei, as well as by Coulomb excitation for <sup>222</sup>Rn and <sup>222</sup>Ra. Low-spin levels in <sup>222</sup>Ra have been investigated also through the <span><math><msup><mrow><mi>β</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> decay of <sup>222</sup>Fr. Half-lives of the excited states are known for 7 levels in <sup>222</sup>Rn, 12 levels in <sup>222</sup>Ra, and 3 levels in <sup>222</sup>Th. Octupole deformations, with the presence of alternating-parity bands up to (16<sup>+</sup>) and (<span><math><msup><mrow><mn>21</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Rn, (20<sup>+</sup>) and (<span><math><msup><mrow><mn>19</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Ra, and (26<sup>+</sup>) and (<span><math><msup><mrow><mn>25</mn></mrow><mrow><mo>−</mo></mrow></msup></math></span>) in <sup>222</sup>Th, and with interband E1 transitions, have been established in these three nuclei. The present evaluation supersedes the previous <span><math><mi>A</mi><mo>=</mo><mn>222</mn></math></span> ENSDF evaluations: (2011Si24), (1996El01), (1987El06) and (1977To14).</p></div>\",\"PeriodicalId\":49735,\"journal\":{\"name\":\"Nuclear Data Sheets\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2023-11-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Data Sheets\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0090375223000625\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Data Sheets","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0090375223000625","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
Nuclear Structure and Decay Data for A = 222 Isobars
Evaluated data are presented for 11 known nuclides (Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, and Np), and relevant Jπ and T1/2 data for nuclei decaying by α-decay to nuclei. For 222Bi, only the isotopic identification is established with no measurement of its half-life. For 222Po, 222At, 222Fr, 222U, and 222Np, data are available only for the ground states, with static magnetic dipole and electric quadrupole moments, and charge radius measurements for the 222Fr ground state. For 222Ac and 222Pa, two low-lying levels are known from 226Pa α decay, and 226Np decay, respectively, but with no information about Jπ assignments and γ decays of these levels. For 222Pa, a long-lived isomeric state is known, decaying dominantly by α decay. 222Rn, 222Ra, and 222Th have been investigated in detail, the low-spin states by α decay and the high-spin studies of ground-state and octupole bands by in-beam γ-ray studies for all the three nuclei, as well as by Coulomb excitation for 222Rn and 222Ra. Low-spin levels in 222Ra have been investigated also through the decay of 222Fr. Half-lives of the excited states are known for 7 levels in 222Rn, 12 levels in 222Ra, and 3 levels in 222Th. Octupole deformations, with the presence of alternating-parity bands up to (16+) and () in 222Rn, (20+) and () in 222Ra, and (26+) and () in 222Th, and with interband E1 transitions, have been established in these three nuclei. The present evaluation supersedes the previous ENSDF evaluations: (2011Si24), (1996El01), (1987El06) and (1977To14).
期刊介绍:
The Nuclear Data Sheets are current and are published monthly. They are devoted to compilation and evaluations of experimental and theoretical results in Nuclear Physics. The journal is mostly produced from Evaluated Nuclear Structure Data File (ENSDF), a computer file maintained by the US National Nuclear Data Center