Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149Lu
Abstract
Using the fusion-evaporation reaction 96Ru(58Ni,p4n)149Lu and the MARA vacuum-mode recoil separator, a new proton-emitting isotope 149Lu has been identified. The measured decay Q value of 1920(20) keV is the highest measured for a ground-state proton decay, and it naturally leads to the shortest directly measured half-life of 450+170−100 ns for a ground-state proton emitter. The decay rate is consistent with lp=5 emission, suggesting a dominant πh11/2 component for the wave function of the proton-emitting state. Through nonadiabatic quasiparticle calculations it was concluded that 149Lu is the most oblate deformed proton emitter observed to date.
Main Authors
Format
Articles
Research article
Published
2022
Series
Subjects
Publication in research information system
Publisher
American Physical Society (APS)
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202206103232Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.128.112501
Language
English
Published in
Physical Review Letters
Citation
- Auranen, K., Briscoe, A. D., Ferreira, L. S., Grahn, T., Greenlees, P. T., Herzáň, A., Illana, A., Joss, D. T., Joukainen, H., Julin, R., Jutila, H., Leino, M., Louko, J., Luoma, M., Maglione, E., Ojala, J., Page, R. D., Pakarinen, J., Rahkila, P., . . . Zimba, G. (2022). Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed 149Lu. Physical Review Letters, 128(11), Article 112501. https://doi.org/10.1103/PhysRevLett.128.112501
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Funder(s)
Research Council of Finland
Funding program(s)
Postdoctoral Researcher, AoF
Tutkijatohtori, SA
Additional information about funding
This work was supported by the Academy of Finland under the Contract No. 323710 (Personal research project, K. A.). R. D. P. and D. T. J. acknowledge support of the Science and Technology Facilities Council, UK. A. H. would like to thank the Slovak Research and Development Agency under Contract No. APVV-20-0532, and Slovak grant agency VEGA (Contract No. 2/0067/21).
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