Prompt and delayed spectroscopy of At203: Observation of a shears band and a 29/2+ isomeric state

Auranen, K.; Uusitalo, J.; Juutinen, S.; Badran, H.; Bisso, F. Defranchi; Cox, D.; Grahn, T.; Greenlees, P. T.; Herzan, A.; Jakobsson, U.; Julin, R.; Konki, J.; Leino, M.; Lightfoot, A.; Mallaburn, M. J.; Neuvonen, O.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Sandzelius, M.; Saren, J.; Scholey, C.; Sorri, J.; Stolze, S.; Wang, Y. K.

doi:10.1103/PhysRevC.97.024301

Title: Prompt and delayed spectroscopy of ${}^{203}{At}$ : Observation of a shears band and a $29 / 2^{+}$ isomeric state

Journal Article · Fri Feb 02 00:00:00 EST 2018 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.97.024301· OSTI ID:1426226

Auranen, K. ^[1]; Uusitalo, J. ^[2]; Juutinen, S. ^[2]; Badran, H. ^[2]; Bisso, F. Defranchi ^[2]; Cox, D. ^[2]; Grahn, T. ^[2]; Greenlees, P. T. ^[2]; Herzan, A. ^[3]; Jakobsson, U. ^[4]; Julin, R. ^[2]; Konki, J. ^[2]; Leino, M. ^[2]; Lightfoot, A. ^[2]; Mallaburn, M. J. ^[5]; Neuvonen, O. ^[2]; Pakarinen, J. ^[2]; Papadakis, P. ^[2]; Partanen, J. ^[2]; Rahkila, P. ^[2] more »

Univ. of Jyvaskyla, Jyvaskyla (Finland); Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Jyvaskyla, Jyvaskyla (Finland)
Univ. of Jyvaskyla, Jyvaskyla (Finland); Univ. of Liverpool, Liverpool (United Kingdom)
Royal Institute of Technology, Stockholm (Sweden); Univ. of Helsinki (Finland)
Univ. of Manchester, Manchester (United Kingdom)
Univ. of Jyvaskyla, Jyvaskyla (Finland); Univ. of Oulu, Sodankyla (Finland)
Peking Univ., Beijing (China)

Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of ²⁰³At(N=118) significantly. We have observed an isomeric [τ=14.1(3)μs] state with a spin and parity of 29/2⁺. The isomeric state is suggested to originate from the π(h_9/2)Ⓧ||²⁰²Po;11^–> coupling, and it is depopulated through 286 keV E2 and 366 keV E3 transitions. Additionally, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: European Commission, Community Research and Development Information Service (CORDIS), Seventh Framework Programme (FP7); United Kingdom Science and Technology Facilities Council; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1426226

Alternate ID(s):: OSTI ID: 1419366

Journal Information:: Physical Review C, Vol. 97, Issue 2; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Title: Prompt and delayed spectroscopy of ${}^{203}{At}$ : Observation of a shears band and a $29 / 2^{+}$ isomeric state