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

Abstract

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.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [2];  [2];  [2];  [5];  [2];  [2];  [2];  [2];  [2] more »;  [2];  [2];  [2];  [6];  [2];  [7] « less
  1. Univ. of Jyvaskyla, Jyvaskyla (Finland); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Jyvaskyla, Jyvaskyla (Finland)
  3. Univ. of Jyvaskyla, Jyvaskyla (Finland); Univ. of Liverpool, Liverpool (United Kingdom)
  4. Royal Institute of Technology, Stockholm (Sweden); Univ. of Helsinki (Finland)
  5. Univ. of Manchester, Manchester (United Kingdom)
  6. Univ. of Jyvaskyla, Jyvaskyla (Finland); Univ. of Oulu, Sodankyla (Finland)
  7. Peking Univ., Beijing (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
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) (SC-26)
OSTI Identifier:
1426226
Alternate Identifier(s):
OSTI ID: 1419366
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

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., and Wang, Y. K. Prompt and delayed spectroscopy of At203: Observation of a shears band and a 29/2+ isomeric state. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.024301.
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. Prompt and delayed spectroscopy of At203: Observation of a shears band and a 29/2+ isomeric state. United States. doi:10.1103/PhysRevC.97.024301.
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., and Wang, Y. K. Fri . "Prompt and delayed spectroscopy of At203: Observation of a shears band and a 29/2+ isomeric state". United States. doi:10.1103/PhysRevC.97.024301. https://www.osti.gov/servlets/purl/1426226.
@article{osti_1426226,
title = {Prompt and delayed spectroscopy of At203: Observation of a shears band and a 29/2+ isomeric state},
author = {Auranen, K. and Uusitalo, J. and Juutinen, S. and Badran, H. and Bisso, F. Defranchi and Cox, D. and Grahn, T. and Greenlees, P. T. and Herzan, A. and Jakobsson, U. and Julin, R. and Konki, J. and Leino, M. and Lightfoot, A. and Mallaburn, M. J. and Neuvonen, O. and Pakarinen, J. and Papadakis, P. and Partanen, J. and Rahkila, P. and Sandzelius, M. and Saren, J. and Scholey, C. and Sorri, J. and Stolze, S. and Wang, Y. K.},
abstractNote = {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(h9/2)Ⓧ||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.},
doi = {10.1103/PhysRevC.97.024301},
journal = {Physical Review C},
number = 2,
volume = 97,
place = {United States},
year = {2018},
month = {2}
}

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