γ-ray linear polarization measurements and (g9 / 2)-3 neutron alignment in 91Ru
Y. Zheng , G. De France , E Clement , A. Dijon , B. Cederwall , R. Wadsworth , T. Bäck , F. Ghazi Moradi , Grzegorz Jaworski , B.M. Nyakó , J. Nyberg , M. Palacz , H. Al-Azri , G. De Angelis , A. Atac , Ö. Aktaş , S. Bhattacharyya , T. Brock , P.J. Davies , A. Di Nitto , Z.S. Dombrádi , A. Gadea , J. Gál , P. Joshi , K. Juhász , R. Julin , A. Jungclaus , G. Kalinka , J. Kownacki , G. La Rana , S.M. Lenzi , J. Molnár , R. Moro , D.R. Napoli , B.S. Nara Singh , A. Persson , F. Recchia , M. Sandzelius , J.-N. Scheurer , G Sletten , D. Sohler , P.-A. Söderström , M.J. Taylor , J. Timár , J.J. Valiente-Dobon , E. Vardaci
AbstractLinear polarization measurements have been performed for γ rays in 91Ru produced with the 58Ni(36Ar, 2p1nγ)91Ru reaction at a beam energy of 111 MeV. The EXOGAM Ge clover array has been used to measure the γ-γ coincidences, γ-ray linear polarization, and γ-ray angular distributions. The polarization sensitivity of the EXOGAM clover detectors acting as Compton polarimeters has been determined in the energy range 0.3-1.3 MeV. Several transitions have been observed for the first time. Measurements of linear polarization and angular distribution have led to the firm assignments of spin differences and parity of high-spin states in 91Ru. More specifically, calculations using a semiempirical shell model were performed to understand the structures of the first and second (21/2+) and (17/2+) levels. The results are in good agreement with the experimental data, supporting the interpretation of the nonyrast (21/2+) and (17/2+) states in terms of the Jmax and Jmax-2 members of the seniority-three ν(g9/2 ) -3 multiplet. © 2013 American Physical Society.
|Journal series||Physical Review C, ISSN 0556-2813|
|Publication size in sheets||0.5|
|Score|| = 45.0, ArticleFromJournal|
= 45.0, ArticleFromJournal
|Publication indicators||: 2013 = 3.881 (2) - 2013=3.551 (5)|
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