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
Julkaistu sarjassa
Physical Review CPäivämäärä
2017Tekijänoikeudet
© 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.
Julkaisija
American Physical SocietyISSN Hae Julkaisufoorumista
2469-9985Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/26981816