Identification of deformed intruder states in semi-magic Ni 70
The structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model...
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| creator | Chiara, C. J. Weisshaar, D. Janssens, R. V. F. Tsunoda, Y. Otsuka, T. Harker, J. L. Walters, W. B. Recchia, F. Albers, M. Alcorta, M. Bader, V. M. Baugher, T. Bazin, D. Berryman, J. S. Bertone, P. F. Campbell, C. M. Carpenter, M. P. Chen, J. Crawford, H. L. David, H. M. Doherty, D. T. Gade, A. Hoffman, C. R. Honma, M. Kondev, F. G. Korichi, A. Langer, C. Larson, N. Lauritsen, T. Liddick, S. N. Lunderberg, E. Macchiavelli, A. O. Noji, S. Prokop, C. Rogers, A. M. Seweryniak, D. Shimizu, N. Stroberg, S. R. Suchyta, S. Utsuno, Y. Williams, S. J. Wimmer, K. Zhu, S. |
| description | The structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model calculations using effective interactions in the neutron f(5/2)pg(9/2) model space. The second 2(+) and (4(+)) states, however, can only be successfully described when proton excitations across the Z = 28 shell gap are included. Monte Carlo shell-model calculations suggest that the latter two states are part of a prolate-deformed intruder sequence, establishing an instance of shape coexistence at low excitation energies similar to that observed recently in neighboring Ni-68. |
| doi_str_mv | 10.1103/PhysRevC.91.044309 |
| format | Article |
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J.</creatorcontrib><creatorcontrib>Wimmer, K.</creatorcontrib><creatorcontrib>Zhu, S.</creatorcontrib><title>Identification of deformed intruder states in semi-magic Ni 70</title><title>Physical review. C</title><description>The structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model calculations using effective interactions in the neutron f(5/2)pg(9/2) model space. The second 2(+) and (4(+)) states, however, can only be successfully described when proton excitations across the Z = 28 shell gap are included. Monte Carlo shell-model calculations suggest that the latter two states are part of a prolate-deformed intruder sequence, establishing an instance of shape coexistence at low excitation energies similar to that observed recently in neighboring Ni-68.</description><subject>Nuclear Experiment</subject><subject>Physics</subject><issn>0556-2813</issn><issn>2469-9985</issn><issn>1089-490X</issn><issn>2469-9993</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNo9kEFLAzEQhYMoWKt_wNPiVbbOJNnd5CKUorZQVETBW8hmJzbS7pZNLPTfu1J1Lo-B773Dx9glwgQRxM3zah9faDebaJyAlAL0ERshKJ1LDe_HbARFUeZcoThlZzF-wnBClCN2u2ioTcEHZ1Po2qzzWUO-6zfUZKFN_VdDfRaTTRSHP4u0CfnGfgSXPYasgnN24u060sVvjtnb_d3rbJ4vnx4Ws-kyd5wXKdfCS6qs4A3ysuTKom9k3XhdKadkRaV2soaaQAKvCy89eCWpKAWVDgU6MWZXh90upmCiC4ncynVtSy4ZRIWg1QBdH6CVXZttHza235vOBjOfLk1o-VYYQJQKUO5woPmBdn0XY0_-v4JgfqSaP6lGozlIFd-dlGoL</recordid><startdate>20150413</startdate><enddate>20150413</enddate><creator>Chiara, C. 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G.</au><au>Korichi, A.</au><au>Langer, C.</au><au>Larson, N.</au><au>Lauritsen, T.</au><au>Liddick, S. N.</au><au>Lunderberg, E.</au><au>Macchiavelli, A. O.</au><au>Noji, S.</au><au>Prokop, C.</au><au>Rogers, A. M.</au><au>Seweryniak, D.</au><au>Shimizu, N.</au><au>Stroberg, S. R.</au><au>Suchyta, S.</au><au>Utsuno, Y.</au><au>Williams, S. J.</au><au>Wimmer, K.</au><au>Zhu, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Identification of deformed intruder states in semi-magic Ni 70</atitle><jtitle>Physical review. C</jtitle><date>2015-04-13</date><risdate>2015</risdate><volume>91</volume><issue>4</issue><artnum>044309</artnum><issn>0556-2813</issn><issn>2469-9985</issn><eissn>1089-490X</eissn><eissn>2469-9993</eissn><abstract>The structure of semi-magic Ni-70(28)42 was investigated following complementary multinucleon-transfer and secondary fragmentation reactions. Changes to the higher-spin, presumed negative-parity states based on observed gamma-ray coincidence relationships result in better agreement with shell-model calculations using effective interactions in the neutron f(5/2)pg(9/2) model space. The second 2(+) and (4(+)) states, however, can only be successfully described when proton excitations across the Z = 28 shell gap are included. Monte Carlo shell-model calculations suggest that the latter two states are part of a prolate-deformed intruder sequence, establishing an instance of shape coexistence at low excitation energies similar to that observed recently in neighboring Ni-68.</abstract><cop>United States</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevC.91.044309</doi><orcidid>https://orcid.org/0000-0001-8825-0976</orcidid><orcidid>https://orcid.org/0000-0001-8178-0405</orcidid><orcidid>https://orcid.org/0000-0002-6468-8292</orcidid><orcidid>https://orcid.org/0000-0002-9190-3971</orcidid></addata></record> |
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| subjects | Nuclear Experiment Physics |
| title | Identification of deformed intruder states in semi-magic Ni 70 |
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