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Title: Experimental study of isomeric intruder 1 2 + states in At 197 , 203

A newly observed isomeric intruder ½ + state [T ½=3.5(6)ms] is identified in 203At using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2 ground state, and it is suggested to originate from the π(s ½) –1 configuration. In addition, the structures above the ½ + state in 203At and 197At are studied using in-beam γ-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. As a result, the ½ + state is fed from 3/2 + and 5/2 + states, and the origin of these states are discussed.
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] ;  [2] ;  [2] « less
  1. Univ. of Jyvaskyla (Finland); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of Jyvaskyla (Finland)
  3. Univ. of Jyvaskyla (Finland); Univ. of Liverpool, Liverpool (United Kingdom)
  4. Royal Institute of Technology, Stockholm (Sweden); Univ. of Helsinki (Finland)
  5. The Univ. of Manchester, Manchester (United Kingdom)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
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); Academy of Finland, Centre of Excellence; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1368565
Alternate Identifier(s):
OSTI ID: 1351042

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., Neuvonen, O., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., and Stolze, S.. Experimental study of isomeric intruder 12+ states in At197,203. United States: N. p., Web. doi:10.1103/PhysRevC.95.044311.
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., Neuvonen, O., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., & Stolze, S.. Experimental study of isomeric intruder 12+ states in At197,203. United States. doi:10.1103/PhysRevC.95.044311.
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., Neuvonen, O., Pakarinen, J., Papadakis, P., Partanen, J., Rahkila, P., Sandzelius, M., Saren, J., Scholey, C., Sorri, J., and Stolze, S.. 2017. "Experimental study of isomeric intruder 12+ states in At197,203". United States. doi:10.1103/PhysRevC.95.044311. https://www.osti.gov/servlets/purl/1368565.
@article{osti_1368565,
title = {Experimental study of isomeric intruder 12+ states in At197,203},
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. 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.},
abstractNote = {A newly observed isomeric intruder ½+ state [T½=3.5(6)ms] is identified in 203At using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2– ground state, and it is suggested to originate from the π(s½)–1 configuration. In addition, the structures above the ½+ state in 203At and 197At are studied using in-beam γ-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. As a result, the ½+ state is fed from 3/2+ and 5/2+ states, and the origin of these states are discussed.},
doi = {10.1103/PhysRevC.95.044311},
journal = {Physical Review C},
number = 4,
volume = 95,
place = {United States},
year = {2017},
month = {4}
}