Excited states of the odd-odd nucleus 122 I are investigated via the fusion-evaporation reaction 116 Cd( 11 B,5n) at a beam energy of 68 MeV. The two most strongly populated bands in 122 I are observed up to excitation energies around 10.5 MeV. Their possible configurations at lower spins are assigned to 𝜋ℎ 11/2 ⊗ 𝜈ℎ 11/2 and 𝜋ℎ 11/2 ⊗ 𝜈𝑑 5/2 based on the observed population, B(M1)/B(E2) values, alignments and signature splitting. E1 transitions are observed connecting the 𝜋ℎ 11/2 ⊗ 𝜈𝑑 5/2 band to the 𝜋ℎ 11/2 ⊗ 𝜈ℎ 11/2 band, which may be evidence of octupole collectivity. Band terminations caused by the full alignment of the valence nucleons outside the 114 Sn core are observed in both bands.

High spin states in the odd-A nucleus 113 In have been investigated using the reaction 110 Pd(7 Li, 4n) at a beam energy of 50 MeV. A new positive parity dipole band with the configuration of π(g 9/2) −1 ν(h 11/2) 2 ν(g 7/2) 2 is established. The effective interaction V (θ) values of this band have been successfully described by a semiclassical geometric model based on shear mechanism, which show that the dipole band has the characteristics of magnetic rotation. In addition the collective rotational angular momentum for this band is extracted. The results show that the core contribution increases gradually with the increase of the rotation frequency.

Collision-induced dissociation of protonated N,N-dibenzylaniline was investigated by electrospray tandem mass spectrometry. Various fragmentation pathways were dominated by benzyl cation and proton transfer. Benzyl cation transfers from the initial site (nitrogen) to benzylic phenyl or aniline phenyl ring. The benzyl cations transfer to the two different sites, and both result in the benzene loss combined with 1,3-H shift. In addition, after the benzyl cation transfers to the benzylic phenyl ring, 1,2-H shift and 1,4-H shift proceed competitively to trigger the diphenylmethane loss and aniline loss, respectively. Deuterium labeling experiments, substituent labeling experiments and density functional theory calculations were performed to support the proposed benzyl cation and proton transfer mechanism. Overall, this study enriches the knowledge of fragmentation mechanisms of protonated N-benzyl compounds. Copyright © 2017 John Wiley & Sons, Ltd.

The excited states of the doubly-odd 120 I have been investigated via the 110 Pd( 14 N, 4n) and the 114 Cd( 10 B, 4n) reactions at beam energies of 64 MeV and 48 MeV, respectively. The previously known bands are extended, and a new band structure is established. The yrast band is assigned to the πh 11/2 νh 11/2 configuration instead of the previously assigned πg 7/2 νh 11/2 configuration. Possible configurations of the other observed bands are also discussed.

Excited states in 120 I are investigated utilizing in-beam gamma-ray spectroscopy following the 114 Cd( 11 B,5n) reaction at 70 MeV bombarding energy. A level scheme is constructed with states up to 9 MeV. The levels are classified into several bands and their possible configurations at low spins are discussed briefly. Based on the linking transitions between different bands at higher spins, the excitation energy of the previously reported 𝑇 1/2 = 53 min isomer is ascertained to be 72 keV. Evidence showing the existence of an isomer at an excitation energy of 6.4 MeV is presented.