γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru

Y. Zheng, G. De France, E. Clément, A. Dijon, B. Cederwall, R. Wadsworth, T. Bäck, F. Ghazi Moradi, G. Jaworski, B. Nyakó, J. Nyberg, M. Palacz, H. Al-Azri, G. De Angelis, A. Atac, Ö Aktaş, S. Bhattacharyya, T. Brock, P. J. Davies, A. Di NittoZs. 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. Tímár, J. J. Valiente-Dobon, E. Vardaci

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Abstract

Linear 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.

Original languageEnglish
Article number044328
JournalPhysical Review C - Nuclear Physics
Volume87
Issue number4
DOIs
Publication statusPublished - Apr 22 2013

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linear polarization
rays
alignment
neutrons
angular distribution
polarimeters
parity
fine structure
energy
detectors
polarization

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Zheng, Y., De France, G., Clément, E., Dijon, A., Cederwall, B., Wadsworth, R., ... Vardaci, E. (2013). γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru. Physical Review C - Nuclear Physics, 87(4), [044328]. https://doi.org/10.1103/PhysRevC.87.044328

γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru. / Zheng, Y.; De France, G.; Clément, E.; Dijon, A.; Cederwall, B.; Wadsworth, R.; Bäck, T.; Ghazi Moradi, F.; Jaworski, G.; Nyakó, B.; Nyberg, J.; Palacz, M.; Al-Azri, H.; De Angelis, G.; Atac, A.; Aktaş, Ö; Bhattacharyya, S.; Brock, T.; Davies, P. J.; Di Nitto, A.; Dombrádi, Zs. S.; Gadea, A.; Gál, J.; Joshi, P.; Juhász, K.; Julin, R.; Jungclaus, A.; Kalinka, G.; Kownacki, J.; La Rana, G.; Lenzi, S. M.; Molnár, J.; Moro, R.; Napoli, D. R.; Nara Singh, B. S.; Persson, A.; Recchia, F.; Sandzelius, M.; Scheurer, J. N.; Sletten, G.; Sohler, D.; Söderström, P. A.; Taylor, M. J.; Tímár, J.; Valiente-Dobon, J. J.; Vardaci, E.

In: Physical Review C - Nuclear Physics, Vol. 87, No. 4, 044328, 22.04.2013.

Research output: Contribution to journalArticle

Zheng, Y, De France, G, Clément, E, Dijon, A, Cederwall, B, Wadsworth, R, Bäck, T, Ghazi Moradi, F, Jaworski, G, Nyakó, B, Nyberg, J, Palacz, M, Al-Azri, H, De Angelis, G, Atac, A, Aktaş, Ö, Bhattacharyya, S, Brock, T, Davies, PJ, Di Nitto, A, Dombrádi, ZS, Gadea, A, Gál, J, Joshi, P, Juhász, K, Julin, R, Jungclaus, A, Kalinka, G, Kownacki, J, La Rana, G, Lenzi, SM, Molnár, J, Moro, R, Napoli, DR, Nara Singh, BS, Persson, A, Recchia, F, Sandzelius, M, Scheurer, JN, Sletten, G, Sohler, D, Söderström, PA, Taylor, MJ, Tímár, J, Valiente-Dobon, JJ & Vardaci, E 2013, 'γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru', Physical Review C - Nuclear Physics, vol. 87, no. 4, 044328. https://doi.org/10.1103/PhysRevC.87.044328
Zheng Y, De France G, Clément E, Dijon A, Cederwall B, Wadsworth R et al. γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru. Physical Review C - Nuclear Physics. 2013 Apr 22;87(4). 044328. https://doi.org/10.1103/PhysRevC.87.044328
Zheng, Y. ; De France, G. ; Clément, E. ; Dijon, A. ; Cederwall, B. ; Wadsworth, R. ; Bäck, T. ; Ghazi Moradi, F. ; Jaworski, G. ; Nyakó, B. ; Nyberg, J. ; Palacz, M. ; Al-Azri, H. ; De Angelis, G. ; Atac, A. ; Aktaş, Ö ; Bhattacharyya, S. ; Brock, T. ; Davies, P. J. ; Di Nitto, A. ; Dombrádi, Zs. S. ; Gadea, A. ; Gál, J. ; Joshi, P. ; Juhász, K. ; Julin, R. ; Jungclaus, A. ; Kalinka, G. ; Kownacki, J. ; La Rana, G. ; Lenzi, S. M. ; Molnár, J. ; Moro, R. ; Napoli, D. R. ; Nara Singh, B. S. ; Persson, A. ; Recchia, F. ; Sandzelius, M. ; Scheurer, J. N. ; Sletten, G. ; Sohler, D. ; Söderström, P. A. ; Taylor, M. J. ; Tímár, J. ; Valiente-Dobon, J. J. ; Vardaci, E. / γ-ray linear polarization measurements and (>g9 /2)-3 neutron alignment in 91Ru. In: Physical Review C - Nuclear Physics. 2013 ; Vol. 87, No. 4.
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abstract = "Linear 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.",
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AU - Zheng, Y.

AU - De France, G.

AU - Clément, E.

AU - Dijon, A.

AU - Cederwall, B.

AU - Wadsworth, R.

AU - Bäck, T.

AU - Ghazi Moradi, F.

AU - Jaworski, G.

AU - Nyakó, B.

AU - Nyberg, J.

AU - Palacz, M.

AU - Al-Azri, H.

AU - De Angelis, G.

AU - Atac, A.

AU - Aktaş, Ö

AU - Bhattacharyya, S.

AU - Brock, T.

AU - Davies, P. J.

AU - Di Nitto, A.

AU - Dombrádi, Zs. S.

AU - Gadea, A.

AU - Gál, J.

AU - Joshi, P.

AU - Juhász, K.

AU - Julin, R.

AU - Jungclaus, A.

AU - Kalinka, G.

AU - Kownacki, J.

AU - La Rana, G.

AU - Lenzi, S. M.

AU - Molnár, J.

AU - Moro, R.

AU - Napoli, D. R.

AU - Nara Singh, B. S.

AU - Persson, A.

AU - Recchia, F.

AU - Sandzelius, M.

AU - Scheurer, J. N.

AU - Sletten, G.

AU - Sohler, D.

AU - Söderström, P. A.

AU - Taylor, M. J.

AU - Tímár, J.

AU - Valiente-Dobon, J. J.

AU - Vardaci, E.

PY - 2013/4/22

Y1 - 2013/4/22

N2 - Linear 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.

AB - Linear 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.

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