Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed Lu-149

Auranen, K, Briscoe, AD, Ferreira, LS, Grahn, T, Greenlees, PT, Herzan, A, Illana, A, Joss, DT ORCID: 0000-0001-5763-8767, Joukainen, H, Julin, R
et al (show 16 more authors) (2022) Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed Lu-149. PHYSICAL REVIEW LETTERS, 128 (11). 112501-.

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Using the fusion-evaporation reaction ^{96}Ru(^{58}Ni,p4n)^{149}Lu and the MARA vacuum-mode recoil separator, a new proton-emitting isotope ^{149}Lu 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_{-100}^{+170}  ns for a ground-state proton emitter. The decay rate is consistent with l_{p}=5 emission, suggesting a dominant πh_{11/2} component for the wave function of the proton-emitting state. Through nonadiabatic quasiparticle calculations it was concluded that ^{149}Lu is the most oblate deformed proton emitter observed to date.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 06 Apr 2022 10:54
Last Modified: 18 Jan 2023 21:05
DOI: 10.1103/PhysRevLett.128.112501
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