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Alpha-decay studies of the francium isotopes 198Fr and 199Fr nuclei

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Uusitalo, J., Sarén, J., Juutinen, S., Leino, M., Eeckhaudt, S., Grahn, T., Greenlees, P., Jakobsson, U., Jones, P., Julin, R., Ketelhut, S., Leppänen, A.-P., Nyman, M., Pakarinen, J., Rahkila, P., Scholey, C., Semchenkov, A., Sorri, J., Steer, A., & Venhart, M. (2013). Alpha-decay studies of the francium isotopes 198Fr and 199Fr nuclei. Physical Review C, 87(6), Article 064304. https://doi.org/10.1103/PhysRevC.87.064304
Published in
Physical Review C
Authors
Uusitalo, Juha |
Sarén, Jan |
Juutinen, Sakari |
Leino, Matti |
Eeckhaudt, Sarah |
Grahn, Tuomas |
Greenlees, Paul |
Jakobsson, Ulrika |
Jones, Peter |
Julin, Rauno |
Ketelhut, Steffen |
Leppänen, Ari-Pekka |
Nyman, Markus |
Pakarinen, Janne |
Rahkila, Panu |
Scholey, Catherine |
Semchenkov, A. |
Sorri, Juha |
Steer, Andrew |
Venhart, Martin
Date
2013
Discipline
FysiikkaKiihdytinlaboratorioPhysicsAccelerator Laboratory
Copyright
© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.

 
Very neutron deficient francium isotopes have been produced in fusion evaporation reactions using 60Ni ions on 141Pr targets. The gas-filled recoil separator RITU was employed to collect the fusion products and to separate them from the scattered beam. The activities were implanted into a position sensitive silicon detector after passing through a gas-counter system. The isotopes were identified using spatial and time correlations between the implants and the decays. Two α-particle activities, with Eα = 7613(15) keV and T1/2 = (15+12 −5 ) ms and Eα = 7684(15) keV and T1/2 = (16+13 −5 ) ms were identified in the new isotope 198Fr. In addition, the half-life and α-particle energy of 199Fr were measured with improved precision. The measured decay properties deduced for 199Fr and 198Fr suggest that there is an onset of ground-state deformation at N = 112 in the Fr isotopes.
Publisher
American Physical Society
ISSN Search the Publication Forum
0556-2813
Keywords
Experimental Nuclear Physics
DOI
https://doi.org/10.1103/PhysRevC.87.064304
URI

http://urn.fi/URN:NBN:fi:jyu-201602031409

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/23219084

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