New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation
The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-liv...
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| Veröffentlicht in: | Physical review letters 2012-09, Vol.109 (11), p.112501-112501, Article 112501 |
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| creator | Madurga, M Surman, R Borzov, I N Grzywacz, R Rykaczewski, K P Gross, C J Miller, D Stracener, D W Batchelder, J C Brewer, N T Cartegni, L Hamilton, J H Hwang, J K Liu, S H Ilyushkin, S V Jost, C Karny, M Korgul, A Królas, W Kuźniak, A Mazzocchi, C Mendez, 2nd, A J Miernik, K Padgett, S W Paulauskas, S V Ramayya, A V Winger, J A Wolińska-Cichocka, M Zganjar, E F |
| description | The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-lives were found to be very different from the predictions of the global model used in astrophysical simulations. A new calculation was developed using the density functional model, which properly reproduced the new experimental values. The robustness of the new model in the (78)Ni region allowed us to extrapolate data for more neutron-rich isotopes. The revised analysis of the rapid neutron capture process in low entropy environments with our new set of measured and calculated half-lives shows a significant redistribution of predicted isobaric abundances strengthening the yield of A>140 nuclei. |
| doi_str_mv | 10.1103/PhysRevLett.109.112501 |
| format | Article |
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(ORNL), Oak Ridge, TN (United States)</creatorcontrib><creatorcontrib>Holifield Radioactive Ion Beam Facility</creatorcontrib><title>New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-lives were found to be very different from the predictions of the global model used in astrophysical simulations. A new calculation was developed using the density functional model, which properly reproduced the new experimental values. The robustness of the new model in the (78)Ni region allowed us to extrapolate data for more neutron-rich isotopes. The revised analysis of the rapid neutron capture process in low entropy environments with our new set of measured and calculated half-lives shows a significant redistribution of predicted isobaric abundances strengthening the yield of A>140 nuclei.</description><subject>CAPTURE</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>ENTROPY</subject><subject>FUNCTIONAL MODELS</subject><subject>NEUTRON REACTIONS</subject><subject>NEUTRON-RICH ISOTOPES</subject><subject>NUCLEAR PHYSICS AND RADIATION PHYSICS</subject><subject>NUCLEI</subject><subject>R PROCESS</subject><subject>RADIOACTIVE ION BEAMS</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNpNkE9v1DAQxS0EokvpV6gsTlxSZuLEiY-oogVpBagqQuolcuwJa5TEi8fbqt8eoy2I00hvfm_-PCHOES4QQb37unvkG7rfUs4XCKaIdQv4TGwQOlN1iM1zsQFQWBmA7kS8Yv4JAFjr_qU4qRVAq-t6I75_pge5s_NUzeGeWMZJpmqfoiNmebdKu3p5bWXgmOO-9BeyfEjk5UPIO0kzuZziYn-slIOTTHubbA5xfS1eTHZmOnuqp-Lb1Yfby4_V9sv1p8v328op1eeqr7XGyWs3NtROtp8MGnJdo5RvmsaPuvTU1GBLZFD7UY04WlN736LyqI06FW-OcyPnMLALmdzOxXUthw0ILZimK9DbI1Qe-3UgzsMS2NE825XigQvXg0alQBVUH1GXInOiadinsNj0WKDhT_LDf8kXzQzH5Ivx_GnHYVzI_7P9jVr9BtiBglU</recordid><startdate>20120914</startdate><enddate>20120914</enddate><creator>Madurga, M</creator><creator>Surman, R</creator><creator>Borzov, I N</creator><creator>Grzywacz, R</creator><creator>Rykaczewski, K P</creator><creator>Gross, C J</creator><creator>Miller, D</creator><creator>Stracener, D W</creator><creator>Batchelder, J C</creator><creator>Brewer, N T</creator><creator>Cartegni, L</creator><creator>Hamilton, J H</creator><creator>Hwang, J K</creator><creator>Liu, S H</creator><creator>Ilyushkin, S V</creator><creator>Jost, C</creator><creator>Karny, M</creator><creator>Korgul, A</creator><creator>Królas, W</creator><creator>Kuźniak, A</creator><creator>Mazzocchi, C</creator><creator>Mendez, 2nd, A J</creator><creator>Miernik, K</creator><creator>Padgett, S W</creator><creator>Paulauskas, S V</creator><creator>Ramayya, A V</creator><creator>Winger, J A</creator><creator>Wolińska-Cichocka, M</creator><creator>Zganjar, E F</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>20120914</creationdate><title>New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation</title><author>Madurga, M ; Surman, R ; Borzov, I N ; Grzywacz, R ; Rykaczewski, K P ; Gross, C J ; Miller, D ; Stracener, D W ; Batchelder, J C ; Brewer, N T ; Cartegni, L ; Hamilton, J H ; Hwang, J K ; Liu, S H ; Ilyushkin, S V ; Jost, C ; Karny, M ; Korgul, A ; Królas, W ; Kuźniak, A ; Mazzocchi, C ; Mendez, 2nd, A J ; Miernik, K ; Padgett, S W ; Paulauskas, S V ; Ramayya, A V ; Winger, J A ; Wolińska-Cichocka, M ; Zganjar, E F</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c338t-82661fd6cb4e5fa8f919ec7433d444db6fd63f415ee916db3b1ba92dd513d1693</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>CAPTURE</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>ENTROPY</topic><topic>FUNCTIONAL MODELS</topic><topic>NEUTRON REACTIONS</topic><topic>NEUTRON-RICH ISOTOPES</topic><topic>NUCLEAR PHYSICS AND RADIATION PHYSICS</topic><topic>NUCLEI</topic><topic>R PROCESS</topic><topic>RADIOACTIVE ION BEAMS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Madurga, M</creatorcontrib><creatorcontrib>Surman, R</creatorcontrib><creatorcontrib>Borzov, I N</creatorcontrib><creatorcontrib>Grzywacz, R</creatorcontrib><creatorcontrib>Rykaczewski, K P</creatorcontrib><creatorcontrib>Gross, C J</creatorcontrib><creatorcontrib>Miller, D</creatorcontrib><creatorcontrib>Stracener, D W</creatorcontrib><creatorcontrib>Batchelder, J C</creatorcontrib><creatorcontrib>Brewer, N T</creatorcontrib><creatorcontrib>Cartegni, L</creatorcontrib><creatorcontrib>Hamilton, J H</creatorcontrib><creatorcontrib>Hwang, J K</creatorcontrib><creatorcontrib>Liu, S H</creatorcontrib><creatorcontrib>Ilyushkin, S V</creatorcontrib><creatorcontrib>Jost, C</creatorcontrib><creatorcontrib>Karny, M</creatorcontrib><creatorcontrib>Korgul, A</creatorcontrib><creatorcontrib>Królas, W</creatorcontrib><creatorcontrib>Kuźniak, A</creatorcontrib><creatorcontrib>Mazzocchi, C</creatorcontrib><creatorcontrib>Mendez, 2nd, A J</creatorcontrib><creatorcontrib>Miernik, K</creatorcontrib><creatorcontrib>Padgett, S W</creatorcontrib><creatorcontrib>Paulauskas, S V</creatorcontrib><creatorcontrib>Ramayya, A V</creatorcontrib><creatorcontrib>Winger, J A</creatorcontrib><creatorcontrib>Wolińska-Cichocka, M</creatorcontrib><creatorcontrib>Zganjar, E F</creatorcontrib><creatorcontrib>Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)</creatorcontrib><creatorcontrib>Holifield Radioactive Ion Beam Facility</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Madurga, M</au><au>Surman, R</au><au>Borzov, I N</au><au>Grzywacz, R</au><au>Rykaczewski, K P</au><au>Gross, C J</au><au>Miller, D</au><au>Stracener, D W</au><au>Batchelder, J C</au><au>Brewer, N T</au><au>Cartegni, L</au><au>Hamilton, J H</au><au>Hwang, J K</au><au>Liu, S H</au><au>Ilyushkin, S V</au><au>Jost, C</au><au>Karny, M</au><au>Korgul, A</au><au>Królas, W</au><au>Kuźniak, A</au><au>Mazzocchi, C</au><au>Mendez, 2nd, A J</au><au>Miernik, K</au><au>Padgett, S W</au><au>Paulauskas, S V</au><au>Ramayya, A V</au><au>Winger, J A</au><au>Wolińska-Cichocka, M</au><au>Zganjar, E F</au><aucorp>Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)</aucorp><aucorp>Holifield Radioactive Ion Beam Facility</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2012-09-14</date><risdate>2012</risdate><volume>109</volume><issue>11</issue><spage>112501</spage><epage>112501</epage><pages>112501-112501</pages><artnum>112501</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-lives were found to be very different from the predictions of the global model used in astrophysical simulations. A new calculation was developed using the density functional model, which properly reproduced the new experimental values. The robustness of the new model in the (78)Ni region allowed us to extrapolate data for more neutron-rich isotopes. The revised analysis of the rapid neutron capture process in low entropy environments with our new set of measured and calculated half-lives shows a significant redistribution of predicted isobaric abundances strengthening the yield of A>140 nuclei.</abstract><cop>United States</cop><pmid>23005622</pmid><doi>10.1103/PhysRevLett.109.112501</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| source | American Physical Society Journals |
| subjects | CAPTURE CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ENTROPY FUNCTIONAL MODELS NEUTRON REACTIONS NEUTRON-RICH ISOTOPES NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEI R PROCESS RADIOACTIVE ION BEAMS |
| title | New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation |
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