Prompt and delayed spectroscopy of 203At : Observation of a shears band and a 29/2+ isomeric state
Auranen, K., Uusitalo, J., Juutinen, S., Badran, H., Bisso, F. D., Cox, D., . . . Wang, Y. K. (2018). Prompt and delayed spectroscopy of 203At : Observation of a shears band and a 29/2+ isomeric state. Physical Review C, 97 (2), 024301. doi:10.1103/PhysRevC.97.024301
Published inPhysical Review C
© 2018 American Institute of Physics. Published in this repository with the kind permission of the publisher.
Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of 203 At ( N = 118 ) significantly. We have observed an isomeric [ τ = 14.1 ( 3 ) μ s ] state with a spin and parity of 29 / 2 + . The isomeric state is suggested to originate from the π ( h 9 / 2 ) ⊗ ∣ ∣ 202 Po ; 11 − ⟩ coupling, and it is depopulated through 286 keV E 2 and 366 keV E 3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.