1. Nanosecond-Scale Proton Emission from Strongly Oblate-Deformed ^{149}Lu.
- Author
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Auranen K, Briscoe AD, Ferreira LS, Grahn T, Greenlees PT, Herzáň A, Illana A, Joss DT, Joukainen H, Julin R, Jutila H, Leino M, Louko J, Luoma M, Maglione E, Ojala J, Page RD, Pakarinen J, Rahkila P, Romero J, Ruotsalainen P, Sandzelius M, Sarén J, Tolosa-Delgado A, Uusitalo J, and Zimba G
- Abstract
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.
- Published
- 2022
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