Experimental study of isomeric intruder ½+ states 197,203At
Auranen, K., Uusitalo, J., Juutinen, S., Badran, H., Bisso, F. D., Cox, D., Grahn, T., Greenlees, P., Herzan, A., Jakobsson, U., Julin, R., Konki, J., Leino, M., Lightfoot, A., Mallaburn, M., Neuvonen, O., Pakarinen, J., Papadakis, P., Partanen, J., . . . Stolze, S. (2017). Experimental study of isomeric intruder ½+ states 197,203At. Physical Review C, 95(4), Article 044311. https://doi.org/10.1103/PhysRevC.95.044311
Published in
Physical Review CDate
2017Copyright
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
A newly observed isomeric intruder
½
+
state
[
T
½
=
3.5
(
6
)
ms
]
is identified in
203
At
using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of
E
3
and mixed
M
1
/
E
2
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
203
At
and
197
At
are studied using in-beam
γ
-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. The
½
+
state is fed from
3
/
2
+
and
5
/
2
+
states, and the origin of these states are discussed.
Publisher
American Physical SocietyISSN Search the Publication Forum
2469-9985Keywords
Publication in research information system
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