Possible ‘stapler’ band in ¹⁰⁹Ag nucleus

Abstract

High-spin states of 109Ag have been studied using the 7Li + 110Pd reaction at a beam energy of 46 MeV. A negative-parity band decaying to the ground-state band by several new linking transitions is established. Meanwhile, seven new E2 crossover transitions of this band are observed, thereby confirming the spin-parity assignment and ordering of the dipole transitions above the Iπ = 19/2− level. A low energy γ-ray transition of 88 keV is found and placed at the bottom of the negative-parity band, and thus the Iπ = 17/2− level is tentatively assigned as the lowest observed state of this band. Experimental excitation energies and total angular momenta of the negative-parity band are compared with the predictions of self-consistent titled axis cranking relativistic mean-field theory with a three-quasiparticle configuration of . Based on the theoretical description and the analyses of the angular momentum coupling, this negative-parity dipole band is suggested as a ‘stapler’ band. By investigating the angular momentum components, it is found that the valence nucleons in the low-j orbitals play an active role in the ‘stapler’ mechanism.

Self‐assembled graphene oxide microcapsules in Pickering emulsions for photo‐responsive self‐healing epoxy coatings

“…Alternatively, it has been reported that shells of graphene oxide (GO) may be developed from the GO self‐assembly on oil/water interface within Pickering emulsions 21–23 . GO is known to be able to satisfy the demands for the shells of microcapsules, due to its special 2D material, which covers sp 2 and sp 3 ‐ hybridization carbon and considerable oxygen‐containing functional groups 24–27 . Due to the chemistry element and molecular configuration pertaining to GO, 28 GO nanosheets possess dispersibility, amphiphilicity, and flexibility in water and can adhere onto the interface in a spontaneous manner with reducing interfacial energy, which become a kind of 2D surfactant 29–32 .…”