Experimental study of isomeric intruder ½+ states 197,203At
Abstract
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.
Main Authors
Format
Articles
Research article
Published
2017
Series
Subjects
Publication in research information system
Publisher
American Physical Society
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201705022136Use this for linking
Review status
Peer reviewed
ISSN
2469-9985
DOI
https://doi.org/10.1103/PhysRevC.95.044311
Language
English
Published in
Physical Review C
Citation
- 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
License
Copyright© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.