Isomeric ${13/2}^{+}$ state in $^{201}\mathrm{Fr}$

Isomeric ${13 / 2}^{+}$ state in ${}^{201}{Fr}$

K. Auranen, U. Jakobsson, H. Badran, T. Grahn, P. T. Greenlees, A. Herzáň, R. Julin, S. Juutinen, J. Konki, M. Leino, A.-P. Leppänen, G. O'Neill, J. Pakarinen, P. Papadakis, J. Partanen, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, C. Scholey, L. Sinclair, J. Sorri, S. Stolze, J. Uusitalo, and A. Voss

Phys. Rev. C 101, 024306 – Published 18 February 2020

Abstract

We have identified an isomeric state in ${}^{201}{Fr}$ for which we propose a spin and parity of $13 / 2^{+}$ , and interpret it as arising from the $π (i_{13 / 2})$ configuration. A half-life of 720(40) ns was measured, corresponding to $B (M 2) = 0.17 (2)$ W.u., in good agreement with those of other $13 / 2^{+} \to 9 / 2^{-} [π (i_{13 / 2}) \to π (h_{9 / 2})]$ transitions observed in other nuclei in the region. The nuclei of interest were produced in a fusion-evaporation reaction and their decay properties were investigated using the GREAT spectrometer at the focal plane of the RITU gas-filled recoil separator.

Received 19 December 2019
Accepted 30 January 2020

DOI:https://doi.org/10.1103/PhysRevC.101.024306

Physics Subject Headings (PhySH)

Alpha decay Energy levels Isomer decays Lifetimes & widths Nuclear spin & parity Nuclear structure & decays

Nuclear Physics

Authors & Affiliations

K. Auranen ^1,*, U. Jakobsson¹, H. Badran¹, T. Grahn¹, P. T. Greenlees¹, A. Herzáň^1,2, R. Julin¹, S. Juutinen¹, J. Konki^1,†, M. Leino¹, A.-P. Leppänen³, G. O'Neill^1,4, J. Pakarinen¹, P. Papadakis^1,‡, J. Partanen^1,§, P. Rahkila¹, P. Ruotsalainen¹, M. Sandzelius¹, J. Sarén¹, C. Scholey^1,∥, L. Sinclair^1,5, J. Sorri^1,¶, S. Stolze^1,**, J. Uusitalo¹, and A. Voss¹

¹University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland
²Institute of Physics, Slovak Academy of Sciences, SK-84511 Bratislava, Slovakia
³Radiation and Nuclear Safety Authority–STUK, Lähteentie 2, 96400, Rovaniemi, Finland
⁴University of Liverpool, Department of Physics, Oliver Lodge Laboratory, Liverpool L69 7ZE, United Kingdom
⁵Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom

^*kalle.e.k.auranen@jyu.fi
^†Present address: CERN, CH-1211, Geneva 23, Switzerland.
^‡Present address: STFC Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom.
^§Deceased.
^∥Present address: MTC Limited, Ansty Park, Coventry CV79JU, United Kingdom.
^¶Present address: Radiation and Nuclear Safety Authority–STUK, Laippatie 4, 00880 Helsinki, Finland.
^**Present address: Physics Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USA.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 101, Iss. 2 — February 2020

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review C

covering nuclear physics

Isomeric ${13 / 2}^{+}$ state in ${}^{201}{Fr}$

Phys. Rev. C 101, 024306 – Published 18 February 2020

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Physical Review C

covering nuclear physics

Isomeric 13/2+ state in Fr201

Phys. Rev. C 101, 024306 – Published 18 February 2020

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

Isomeric ${13 / 2}^{+}$ state in ${}^{201}{Fr}$