Fig. 1. Nilsson diagram for neutrons^[25]

Fig. 2. Shape coexistence and shape evolution for ^70,72,74,76Ge

Fig. 3. The calculated excitation energies (in MeV) and the intraband and interband B(E2) values (in W.u.) of the ground-state bands, γ- and β- bands in ^72,74,76,78Ge isotopes by 5DCH model compared with the experimental data^[11]

Fig. 4. (a) Excitation energies of the 15/2^- states (relative to the 9/2⁺ states) in odd-A Ge isotopes, and the 3^- and 2⁺ states in even-A Ge isotopes, (b) the experimental B(E1)/B(E2) branching ratios of 19/2^- state in ⁷¹Ge in comparison with experimental values in the neighboring odd-A Ge isotopes, and the octupole-deformed nucleus ²²⁰Ra. The average B(E1)/B(E2) branching ratio with experimental uncertainty for the octupole band in ²²⁰Ra is displayed as the shaded region^[35]. Inset in (a): The neutron single-particle levels originating from the g_9/2 and p_3/2 orbitals in odd-A Ge isotopes.

Fig. 5. Spectra deduced from the detected α+⁶He pairs^[16](a) Two-dimensional plot for the E_x versus the Q value, (b) The projected E_x spectrum for the Q value around Q_ggg (gate G1), (c) The projected Q-value spectrum for E_x around 7.54 MeV (gate G2), (d) The projected E_x spectrum for Q values at the right side of Q_ggg (gate G1r)

Fig. 6. Q-value spectrum from the present experiment for different data sets^[15](a) Identified ¹⁰Be and identified α, (b) Identified ¹⁰Be and unidentified α, (c) Identified α and unidentified ¹⁰Be, (d) Spectrum obtained from previous ⁷Li(⁹Be,¹⁰Be+α)²H experiment ^[50]

Fig. 7. ¹⁴C→¹⁰Be +α relative branching ratio for 21.4-MeV and 22.5-MeV resonances in ¹⁴C with respect to three sets of final states in ¹⁰Be obtained from the present measurement^[15]

Fig. 8. The angular correlation for the 10.3 MeV state, compared with the Legendre polynomials of order 4 (the red dotted line)^[17]. A uniformly distributed background is assumed for the uncorrelated component (the long dot-dashed line). All the theoretical angular distributions are corrected for the detection efficiency. The corresponding reduced χ¯2is also indicated in this plot.

Fig. 9. The principle (a) and result (b) of suppression of Doppler broadening of the spectral linewidth observed using the collinear laser spectroscopy method^[52]

Fig. 10. Collinear laser spectroscopy setup ^[19] (developed at the BRIF facility), as well as the RFQ cooler buncher and laser resonance ionization spectroscopy (under development) ^[57] (red shaded area)

Fig. 11. Hyperfine structure spectra of ^38,39K measured using collinear laser spectroscopy at the BRIF facility^[19]