Beta-delayed neutron and gamma-ray spectroscopy of 17C utilizing spin-polarized 17B

Abstract

Excited states in 17C were investigated through the measurement of beta?-delayed neutrons and gamma rays emitted in the ? decay of 17B. In the measurement, three negative-parity states and two inconclusive states, were identified in 17C above the neutron threshold energy, and seven gamma-lines were identified in a beta?-delayed multiple neutron emission of the 17B ? decay. From these transitions, the beta?-decay scheme of 17B was determined. In the present work, the fibeta-NMR technique is combined with the ?-delayed particle measurements using a fragmentation-induced spin-polarized 17B beam. This new scheme allows us to determine the spin parity of beta?-decay feeding excited states based on the difference in the discrete fibeta-decay asymmetry parameters, provided the states are connected through the Gamow-Teller transition. In this work, 1/2-, 3/2-, and (5/2-) are assigned to the observed states at Ex = 2.71(2), 3.93(2), and 4.05(2) MeV in 17C, respectively.

References in corpus (1)

• Unbound excited states in 19,17C

Cited by in corpus (7)

• Study of ground state properties of carbon isotopes with deformed relativistic Hartree-Bogoliubov theory in continuum
• Single-neutron knockout from ${}^{20}\text{C}$ and the structure of ${}^{19}\text{C}$
• Low-lying single-particle structure of 17C and the N = 14 sub-shell closure
• One-neutron knockout reaction of 17C on a hydrogen target at 70 MeV/nucleon
• Determination of the Neutron-Capture Rate of 17C for the R-process Nucleosynthesis
• Broad resonances and beta-decay
• Unbound states in 17C and p-sd shell-model interactions