Zhang, W., Cederwall, B., Doncel, M., Aktas, O., Ertoprak, A., Liotta, R., Qi, C., Grahn, T., Singh, B. S. Nara, Cullen, D. M., Hodge, D., Giles, M., Stolze, S., Badran, H., Braunroth, T., Calverley, T., Cox, D. M., Fang, Y. D., Greenlees, P. T., Hilton, J., Ideguchi, E., Julin, R., Juutinen, S., Raju, M. Kumar, Li, H., Liu, H., Matta, S., Subramaniam, P., Modamio, V, Pakarinen, J., Papadakis, P., Partanen, J., Petrache, C. M., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., Taylor, M. J., Uusitalo, J. and Valiente-Dobon, J. J. (2021). Lifetime measurements of excited states in Os-169,Os-171,Os-173: Persistence of anomalous B(E2) ratios in transitional rare earth nuclei in the presence of a decoupled i(13/2) valence neutron. Phys. Lett. B, 820. AMSTERDAM: ELSEVIER. ISSN 1873-2445

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Abstract

Lifetimes of low-lying excited states in the nu i(13/2+) bands of the neutron-deficient osmium isotopes 169,171,173Os have been measured for the first time using the recoil-distance Doppler shift and recoil-isomer tagging techniques. An unusually low value is observed for the ratio B(E2; 21/2(+) -> 17/2+)/B(E2; 17/2+ -> 13/2+) in 169Os, similar to the anomalously low values of the ratio B(E2; 4+1 -> 2+1 )/B(E2; 2(1)(+) -> 0(gs)(+)) previously observed in several transitional rare-earth nuclides with even numbers of neutrons and protons, including the neighbouring 168,170Os. Furthermore, the evolution of B(E2; 21/2(+) -> 17/2(+))/B(E2; 17/2(+) -> 13/2(+)) with increasing neutron number in the odd-mass isotopic chain 169,171,173Os is observed to follow the same trend as observed previously in the eveneven Os isotopes. These findings indicate that the possible quantum phase transition from a seniority conserving structure to a collective regime as a function of neutron number suggested for the even-even systems is maintained in these odd-mass osmium nuclei, with the odd valence neutron merely acting as a spectator. As for the even-even nuclei, the phenomenon is highly unexpected for nuclei that are not situated near closed shells. (C) 2021 The Author(s). Published by Elsevier B.V.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Zhang, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cederwall, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doncel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aktas, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ertoprak, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liotta, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Qi, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grahn, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Singh, B. S. NaraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cullen, D. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hodge, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giles, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stolze, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Badran, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braunroth, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Calverley, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cox, D. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fang, Y. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Greenlees, P. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hilton, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ideguchi, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Julin, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Juutinen, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Raju, M. KumarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Li, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matta, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Subramaniam, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Modamio, VUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pakarinen, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Papadakis, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Partanen, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petrache, C. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rahkila, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ruotsalainen, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sandzelius, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saren, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scholey, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sorri, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Taylor, M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Uusitalo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Valiente-Dobon, J. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-603929
DOI: 10.1016/j.physletb.2021.136527
Journal or Publication Title: Phys. Lett. B
Volume: 820
Date: 2021
Publisher: ELSEVIER
Place of Publication: AMSTERDAM
ISSN: 1873-2445
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
GAMMA-RAY SPECTROSCOPY; HIGH-SPIN STATES; SHAPE COEXISTENCE; DEFICIENT; PLUNGER; ISOTOPES; OS-172; GEMultiple languages
Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & FieldsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60392

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