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

Y. Zheng; G. De France; E. Clément; A. Dijon; S. Bhattacharyya; B. Cederwall; T. Bäck; F. Ghazi Moradi; A. Atac; A. Persson; M. Sandzelius; R. Wadsworth; H. Al-Azri; T. Brock; P.J. Davies; P. Joshi; B.S. Nara Singh; M.J. Taylor; G. Jaworski; M. Palacz; J. Kownacki; B.M. Nyakó; Z.S. Dombrádi; J. Gál; G. Kalinka; J. Molnár; D. Sohler; J. Timár; J. Nyberg; P.-A. Söderström; G. De Angelis; D.R. Napoli; J.J. Valiente-Dobon; Ö. Aktaş; A. Di Nitto; G. La Rana; R. Moro; E. Vardaci; A. Gadea; K. Juhász; R. Julin; A. Jungclaus; S.M. Lenzi; F. Recchia; J.-N. Scheurer; G. Sletten

doi:10.1103/PhysRevC.87.044328

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

Y. Zheng, G. De France, E. Clément, A. Dijon, S. Bhattacharyya, B. Cederwall, T. Bäck, F. Ghazi Moradi, A. Atac, A. Persson, M. Sandzelius, R. Wadsworth, H. Al-Azri, T. Brock, P.J. Davies, P. Joshi, B.S. Nara Singh, M.J. Taylor, G. Jaworski, M. PalaczJ. Kownacki, B.M. Nyakó, Z.S. Dombrádi, J. Gál, G. Kalinka, J. Molnár, D. Sohler, J. Timár, J. Nyberg, P.-A. Söderström, G. De Angelis, D.R. Napoli, J.J. Valiente-Dobon, Ö. Aktaş, A. Di Nitto, G. La Rana, R. Moro, E. Vardaci, A. Gadea, K. Juhász, R. Julin, A. Jungclaus, S.M. Lenzi, F. Recchia, J.-N. Scheurer, G. Sletten

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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 J and J-2 members of the seniority-three νg 3 multiplet.

Original language	English
Pages (from-to)	375-396
Journal	Physical Review C
Volume	87
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.87.044328
Publication status	Published - 22 Apr 2013

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Zheng, Y., De France, G., Clément, E., Dijon, A., Bhattacharyya, S., Cederwall, B., Bäck, T., Ghazi Moradi, F., Atac, A., Persson, A., Sandzelius, M., Wadsworth, R., Al-Azri, H., Brock, T., Davies, P. J., Joshi, P., Nara Singh, B. S., Taylor, M. J., Jaworski, G., ... Sletten, G. (2013). γ-ray linear polarization measurements and (>g )3 neutron alignment in 91Ru. Physical Review C, 87(4), 375-396. https://doi.org/10.1103/PhysRevC.87.044328

@article{4f4a5608f86d43f295bcadef16c8c2a7,

title = "γ-ray linear polarization measurements and (>g )3 neutron alignment in 91Ru",

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 J and J-2 members of the seniority-three νg 3 multiplet.",

author = "Y. Zheng and {De France}, G. and E. Cl{\'e}ment and A. Dijon and S. Bhattacharyya and B. Cederwall and T. B{\"a}ck and {Ghazi Moradi}, F. and A. Atac and A. Persson and M. Sandzelius and R. Wadsworth and H. Al-Azri and T. Brock and P.J. Davies and P. Joshi and {Nara Singh}, B.S. and M.J. Taylor and G. Jaworski and M. Palacz and J. Kownacki and B.M. Nyak{\'o} and Z.S. Dombr{\'a}di and J. G{\'a}l and G. Kalinka and J. Moln{\'a}r and D. Sohler and J. Tim{\'a}r and J. Nyberg and P.-A. S{\"o}derstr{\"o}m and {De Angelis}, G. and D.R. Napoli and J.J. Valiente-Dobon and {\"O}. Akta{\c s} and {Di Nitto}, A. and {La Rana}, G. and R. Moro and E. Vardaci and A. Gadea and K. Juh{\'a}sz and R. Julin and A. Jungclaus and S.M. Lenzi and F. Recchia and J.-N. Scheurer and G. Sletten",

year = "2013",

month = apr,

day = "22",

doi = "10.1103/PhysRevC.87.044328",

language = "English",

volume = "87",

pages = "375--396",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Zheng, Y, De France, G, Clément, E, Dijon, A, Bhattacharyya, S, Cederwall, B, Bäck, T, Ghazi Moradi, F, Atac, A, Persson, A, Sandzelius, M, Wadsworth, R, Al-Azri, H, Brock, T, Davies, PJ , Joshi, P, Nara Singh, BS, Taylor, MJ, Jaworski, G, Palacz, M, Kownacki, J, Nyakó, BM, Dombrádi, ZS, Gál, J, Kalinka, G, Molnár, J, Sohler, D, Timár, J, Nyberg, J, Söderström, P-A, De Angelis, G, Napoli, DR, Valiente-Dobon, JJ, Aktaş, Ö, Di Nitto, A, La Rana, G, Moro, R, Vardaci, E, Gadea, A, Juhász, K, Julin, R, Jungclaus, A, Lenzi, SM, Recchia, F, Scheurer, J-N & Sletten, G 2013, 'γ-ray linear polarization measurements and (>g )3 neutron alignment in 91Ru', Physical Review C, vol. 87, no. 4, pp. 375-396. https://doi.org/10.1103/PhysRevC.87.044328

TY - JOUR

T1 - γ-ray linear polarization measurements and (>g )3 neutron alignment in 91Ru

AU - Zheng, Y.

AU - De France, G.

AU - Clément, E.

AU - Dijon, A.

AU - Bhattacharyya, S.

AU - Cederwall, B.

AU - Bäck, T.

AU - Ghazi Moradi, F.

AU - Atac, A.

AU - Persson, A.

AU - Sandzelius, M.

AU - Wadsworth, R.

AU - Al-Azri, H.

AU - Brock, T.

AU - Davies, P.J.

AU - Joshi, P.

AU - Nara Singh, B.S.

AU - Taylor, M.J.

AU - Jaworski, G.

AU - Palacz, M.

AU - Kownacki, J.

AU - Nyakó, B.M.

AU - Dombrádi, Z.S.

AU - Gál, J.

AU - Kalinka, G.

AU - Molnár, J.

AU - Sohler, D.

AU - Timár, J.

AU - Nyberg, J.

AU - Söderström, P.-A.

AU - De Angelis, G.

AU - Napoli, D.R.

AU - Valiente-Dobon, J.J.

AU - Aktaş, Ö.

AU - Di Nitto, A.

AU - La Rana, G.

AU - Moro, R.

AU - Vardaci, E.

AU - Gadea, A.

AU - Juhász, K.

AU - Julin, R.

AU - Jungclaus, A.

AU - Lenzi, S.M.

AU - Recchia, F.

AU - Scheurer, J.-N.

AU - Sletten, G.

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 J and J-2 members of the seniority-three νg 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 J and J-2 members of the seniority-three νg 3 multiplet.

UR - http://www.scopus.com/inward/record.url?scp=84877130355&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.87.044328

DO - 10.1103/PhysRevC.87.044328

M3 - Article

AN - SCOPUS:84877130355

SN - 0556-2813

VL - 87

SP - 375

EP - 396

JO - Physical Review C

JF - Physical Review C

IS - 4

ER -

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

Abstract

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