Gamma-ray linear polarization measurement and $(g9/2)-3$ neutron alignment in 91Ru
Zheng, Y., Clément, G. F. E., Dijon, A., Cederwall, B., Wadsworth, R., Bäck, T., Moradi, F. G., Jaworski, G., Nyako, B.M., Nyberg, J., Palacz, M., Al-Azri, H., Angelis, G. D., Atac, A., Aktas, Ö., Bhattacharyya, S., Brock, T., Davies, P.J., Nitto, A. D., . . . Vardaci, E. (2013). Gamma-ray linear polarization measurement and $(g9/2)-3$ neutron alignment in 91Ru. Physical Review C, 87(4), Article 044328. https://doi.org/10.1103/PhysRevC.87.044328
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Physical Review CDate
2013Copyright
© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.
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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