Identification of a 6.6μs isomeric state in 175Ir

S.A. Gillespie; A.N. Andreyev; M. Al Monthery; C.J. Barton; S. Antalic; K. Auranen; H. Badran; D. Cox; J.G. Cubiss; D. O'Donnell; T. Grahn; P.T. Greenlees; A. Herzan; E. Higgins; R. Julin; S. Juutinen; J. Klimo; J. Konki; M. Leino; M. Mallaburn; J. Pakarinen; P. Papadakis; J. Partanen; P.M. Prajapati; P. Rahkila; M. Sandzelius; C. Scholey; J. Sorri; S. Stolze; R. Urban; J. Uusitalo; M. Venhart; F. Weaving

doi:10.1103/PhysRevC.99.064310

Identification of a 6.6μs isomeric state in ¹⁷⁵Ir

S.A. Gillespie, A.N. Andreyev, M. Al Monthery, C.J. Barton, S. Antalic, K. Auranen, H. Badran, D. Cox, J.G. Cubiss, D. O'Donnell, T. Grahn, P.T. Greenlees, A. Herzan, E. Higgins, R. Julin, S. Juutinen, J. Klimo, J. Konki, M. Leino, M. MallaburnJ. Pakarinen, P. Papadakis, J. Partanen, P.M. Prajapati, P. Rahkila, M. Sandzelius, C. Scholey, J. Sorri, S. Stolze, R. Urban, J. Uusitalo, M. Venhart, F. Weaving

School of Computing, Engineering and Physical Sciences

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Abstract

An experiment has been performed to study excited states in the neutron-deficient nucleus ¹⁷⁵Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyväskylä. By using isomer tagging, an isomeric state with a half-life of 6.58(15) μs has been observed in ¹⁷⁵Ir for the first time. It has been established that the isomer decays via a 45.2 (E1)–26.1 (M1) keV cascade to new states below the previously reported ground state in ¹⁷⁵Ir with I^π=(5/2⁻). We now reassign this (5/2⁻) state to the isomeric state discovered in this study.

Original language	English
Pages (from-to)	064310
Number of pages	6
Journal	Physical Review C
Volume	99
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.99.064310
Publication status	Published - 7 Jun 2019

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2019_05_16_Gillespie_et_al_IsomericAccepted author manuscript, 625 KB

David O'Donnell
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Gillespie, S. A., Andreyev, A. N., Monthery, M. A., Barton, C. J., Antalic, S., Auranen, K., Badran, H., Cox, D., Cubiss, J. G., O'Donnell, D., Grahn, T., Greenlees, P. T., Herzan, A., Higgins, E., Julin, R., Juutinen, S., Klimo, J., Konki, J., Leino, M., ... Weaving, F. (2019). Identification of a 6.6μs isomeric state in ¹⁷⁵Ir. Physical Review C, 99(6), 064310. https://doi.org/10.1103/PhysRevC.99.064310

@article{defdac688b02431fac53058c62931206,

title = "Identification of a 6.6μs isomeric state in 175Ir",

abstract = "An experiment has been performed to study excited states in the neutron-deficient nucleus 175Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyv{\"a}skyl{\"a}. By using isomer tagging, an isomeric state with a half-life of 6.58(15) μs has been observed in 175Ir for the first time. It has been established that the isomer decays via a 45.2 (E1)–26.1 (M1) keV cascade to new states below the previously reported ground state in 175Ir with Iπ=(5/2−). We now reassign this (5/2−) state to the isomeric state discovered in this study.",

author = "S.A. Gillespie and A.N. Andreyev and Monthery, \{M. Al\} and C.J. Barton and S. Antalic and K. Auranen and H. Badran and D. Cox and J.G. Cubiss and D. O'Donnell and T. Grahn and P.T. Greenlees and A. Herzan and E. Higgins and R. Julin and S. Juutinen and J. Klimo and J. Konki and M. Leino and M. Mallaburn and J. Pakarinen and P. Papadakis and J. Partanen and P.M. Prajapati and P. Rahkila and M. Sandzelius and C. Scholey and J. Sorri and S. Stolze and R. Urban and J. Uusitalo and M. Venhart and F. Weaving",

year = "2019",

month = jun,

day = "7",

doi = "10.1103/PhysRevC.99.064310",

language = "English",

volume = "99",

pages = "064310",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Gillespie, SA, Andreyev, AN, Monthery, MA, Barton, CJ, Antalic, S, Auranen, K, Badran, H, Cox, D, Cubiss, JG, O'Donnell, D, Grahn, T, Greenlees, PT, Herzan, A, Higgins, E, Julin, R, Juutinen, S, Klimo, J, Konki, J, Leino, M, Mallaburn, M, Pakarinen, J, Papadakis, P, Partanen, J, Prajapati, PM, Rahkila, P, Sandzelius, M, Scholey, C, Sorri, J, Stolze, S, Urban, R, Uusitalo, J, Venhart, M & Weaving, F 2019, 'Identification of a 6.6μs isomeric state in ¹⁷⁵Ir', Physical Review C, vol. 99, no. 6, pp. 064310. https://doi.org/10.1103/PhysRevC.99.064310

TY - JOUR

T1 - Identification of a 6.6μs isomeric state in 175Ir

AU - Gillespie, S.A.

AU - Andreyev, A.N.

AU - Monthery, M. Al

AU - Barton, C.J.

AU - Antalic, S.

AU - Auranen, K.

AU - Badran, H.

AU - Cox, D.

AU - Cubiss, J.G.

AU - O'Donnell, D.

AU - Grahn, T.

AU - Greenlees, P.T.

AU - Herzan, A.

AU - Higgins, E.

AU - Julin, R.

AU - Juutinen, S.

AU - Klimo, J.

AU - Konki, J.

AU - Leino, M.

AU - Mallaburn, M.

AU - Pakarinen, J.

AU - Papadakis, P.

AU - Partanen, J.

AU - Prajapati, P.M.

AU - Rahkila, P.

AU - Sandzelius, M.

AU - Scholey, C.

AU - Sorri, J.

AU - Stolze, S.

AU - Urban, R.

AU - Uusitalo, J.

AU - Venhart, M.

AU - Weaving, F.

PY - 2019/6/7

Y1 - 2019/6/7

N2 - An experiment has been performed to study excited states in the neutron-deficient nucleus 175Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyväskylä. By using isomer tagging, an isomeric state with a half-life of 6.58(15) μs has been observed in 175Ir for the first time. It has been established that the isomer decays via a 45.2 (E1)–26.1 (M1) keV cascade to new states below the previously reported ground state in 175Ir with Iπ=(5/2−). We now reassign this (5/2−) state to the isomeric state discovered in this study.

AB - An experiment has been performed to study excited states in the neutron-deficient nucleus 175Ir via the use of the JUROGAM II high-purity germanium detector array and the RITU gas-filled separator at JYFL, Jyväskylä. By using isomer tagging, an isomeric state with a half-life of 6.58(15) μs has been observed in 175Ir for the first time. It has been established that the isomer decays via a 45.2 (E1)–26.1 (M1) keV cascade to new states below the previously reported ground state in 175Ir with Iπ=(5/2−). We now reassign this (5/2−) state to the isomeric state discovered in this study.

U2 - 10.1103/PhysRevC.99.064310

DO - 10.1103/PhysRevC.99.064310

M3 - Article

SN - 2469-9985

VL - 99

SP - 064310

JO - Physical Review C

JF - Physical Review C

IS - 6

ER -

Identification of a 6.6μs isomeric state in 175Ir

Abstract

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Identification of a 6.6μs isomeric state in ¹⁷⁵Ir