Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency

D. T. Joss; S. L. King; R. D. Page; J. Simpson; A. Keenan; N. Amzal; T. Bäck; M. A. Bentley; B. Cederwall; J. F C Cocks; D. M. Cullen; P. T. Greenlees; K. Helariutta; P. M. Jones; R. Julin; S. Juutinen; H. Kankaanpää; H. Kettunen; P. Kuusiniemi; M. Leino; M. Muikku; A. Savelius; J. Uusitalo; S. J. Williams

doi:10.1016/S0375-9474(00)00692-8

Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency

D. T. Joss, S. L. King, R. D. Page, J. Simpson, A. Keenan, N. Amzal, T. Bäck, M. A. Bentley, B. Cederwall, J. F C Cocks, D. M. Cullen, P. T. Greenlees, K. Helariutta, P. M. Jones, R. Julin, S. Juutinen, H. Kankaanpää, H. Kettunen, P. Kuusiniemi, M. LeinoM. Muikku, A. Savelius, J. Uusitalo, S. J. Williams

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Abstract

Excited states in the very neutron-deficient isotopes 167Os and 168Os have been observed using the reaction 112Sn(58Ni, 2pxn). The JUROSPHERE γ-ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt γ radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign γ-ray transitions to 167Os and 168Os through the characteristic α radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in 168Os is examined with phenomenological three-band mixing calculations. © 2001 Elsevier Science B.V.

Original language	English
Pages (from-to)	631-654
Number of pages	23
Journal	Nuclear Physics A
Volume	689
Issue number	3-4
DOIs	https://doi.org/10.1016/S0375-9474(00)00692-8
Publication status	Published - 2 Jul 2001

Keywords

21.10.Re
23.20.Lv
27.70.+q
29.30.Kv
112Sn (58Ni, 2p), (58Ni, n2p), E=266 MeV
167,168Os deduced
Measured Eγ , Iγ , (recoil) γ -, γγ -coincidence

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10.1016/S0375-9474(00)00692-8

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Joss, D. T., King, S. L., Page, R. D., Simpson, J., Keenan, A., Amzal, N., Bäck, T., Bentley, M. A., Cederwall, B., Cocks, J. F. C., Cullen, D. M., Greenlees, P. T., Helariutta, K., Jones, P. M., Julin, R., Juutinen, S., Kankaanpää, H., Kettunen, H., Kuusiniemi, P., ... Williams, S. J. (2001). Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency. Nuclear Physics A, 689(3-4), 631-654. https://doi.org/10.1016/S0375-9474(00)00692-8

@article{93077a2419a64648add721310c3f1f6c,

title = "Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency",

abstract = "Excited states in the very neutron-deficient isotopes 167Os and 168Os have been observed using the reaction 112Sn(58Ni, 2pxn). The JUROSPHERE γ-ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt γ radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign γ-ray transitions to 167Os and 168Os through the characteristic α radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in 168Os is examined with phenomenological three-band mixing calculations. {\textcopyright} 2001 Elsevier Science B.V.",

keywords = "21.10.Re, 23.20.Lv, 27.70.+q, 29.30.Kv, 112Sn (58Ni, 2p), (58Ni, n2p), E=266 MeV, 167,168Os deduced, Measured Eγ , Iγ , (recoil) γ -, γγ -coincidence",

author = "Joss, {D. T.} and King, {S. L.} and Page, {R. D.} and J. Simpson and A. Keenan and N. Amzal and T. B{\"a}ck and Bentley, {M. A.} and B. Cederwall and Cocks, {J. F C} and Cullen, {D. M.} and Greenlees, {P. T.} and K. Helariutta and Jones, {P. M.} and R. Julin and S. Juutinen and H. Kankaanp{\"a}{\"a} and H. Kettunen and P. Kuusiniemi and M. Leino and M. Muikku and A. Savelius and J. Uusitalo and Williams, {S. J.}",

year = "2001",

month = jul,

day = "2",

doi = "10.1016/S0375-9474(00)00692-8",

language = "English",

volume = "689",

pages = "631--654",

journal = "Nuclear Physics A",

publisher = "Elsevier BV",

number = "3-4",

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Joss, DT, King, SL, Page, RD, Simpson, J, Keenan, A, Amzal, N, Bäck, T, Bentley, MA, Cederwall, B, Cocks, JFC, Cullen, DM, Greenlees, PT, Helariutta, K, Jones, PM, Julin, R, Juutinen, S, Kankaanpää, H, Kettunen, H, Kuusiniemi, P, Leino, M, Muikku, M, Savelius, A, Uusitalo, J & Williams, SJ 2001, 'Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency', Nuclear Physics A, vol. 689, no. 3-4, pp. 631-654. https://doi.org/10.1016/S0375-9474(00)00692-8

TY - JOUR

T1 - Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency

AU - Joss, D. T.

AU - King, S. L.

AU - Page, R. D.

AU - Simpson, J.

AU - Keenan, A.

AU - Amzal, N.

AU - Bäck, T.

AU - Bentley, M. A.

AU - Cederwall, B.

AU - Cocks, J. F C

AU - Cullen, D. M.

AU - Greenlees, P. T.

AU - Helariutta, K.

AU - Jones, P. M.

AU - Julin, R.

AU - Juutinen, S.

AU - Kankaanpää, H.

AU - Kettunen, H.

AU - Kuusiniemi, P.

AU - Leino, M.

AU - Muikku, M.

AU - Savelius, A.

AU - Uusitalo, J.

AU - Williams, S. J.

PY - 2001/7/2

Y1 - 2001/7/2

N2 - Excited states in the very neutron-deficient isotopes 167Os and 168Os have been observed using the reaction 112Sn(58Ni, 2pxn). The JUROSPHERE γ-ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt γ radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign γ-ray transitions to 167Os and 168Os through the characteristic α radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in 168Os is examined with phenomenological three-band mixing calculations. © 2001 Elsevier Science B.V.

AB - Excited states in the very neutron-deficient isotopes 167Os and 168Os have been observed using the reaction 112Sn(58Ni, 2pxn). The JUROSPHERE γ-ray spectrometer array was used in conjunction with the RITU gas-filled recoil separator to collect prompt γ radiation in coincidence with recoils implanted in a silicon strip detector located at the focal plane of RITU. Using a selective recoil decay tagging technique it has been possible to unambiguously assign γ-ray transitions to 167Os and 168Os through the characteristic α radioactivity of these nuclides. The high-spin structure of the bands is discussed in terms of quasiparticle configurations within the framework of the cranked shell model. The role of shape coexistence in 168Os is examined with phenomenological three-band mixing calculations. © 2001 Elsevier Science B.V.

KW - 21.10.Re

KW - 23.20.Lv

KW - 27.70.+q

KW - 29.30.Kv

KW - 112Sn (58Ni, 2p), (58Ni, n2p), E=266 MeV

KW - 167,168Os deduced

KW - Measured Eγ , Iγ , (recoil) γ -, γγ -coincidence

U2 - 10.1016/S0375-9474(00)00692-8

DO - 10.1016/S0375-9474(00)00692-8

M3 - Article

VL - 689

SP - 631

EP - 654

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 3-4

ER -

Identification of excited states in 167Os and 168Os: Shape coexistence at extreme neutron deficiency

Abstract

Keywords

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