摘要 : An aluminum slab target was irradiated by multiple pulses of Nd:glass laser light with the irradiance of 1.5×1012 W cm-2. After the laser irradiation, a laser-produced aluminum plasma was observed in its recombining phase using a ... 展开 An aluminum slab target was irradiated by multiple pulses of Nd:glass laser light with the irradiance of 1.5×1012 W cm-2. After the laser irradiation, a laser-produced aluminum plasma was observed in its recombining phase using a spectrometer whose relative sensitivity was calibrated. We measured relative intensities of the resonance series lines and the lines of the 2p 2P-nd 2D and 2p 2P-ns 2S series of the Li-like aluminum ions and derived the excited level populations of the upper levels. From the slope of the population distribution of the high-lying excited levels and the transition from the series lines to the continuum, the electron temperature and the electron density were estimated to be 8 eV and 3-5×1025 m-3. A comparison of the experimental population distribution with a collisional-radiative (CR) model calculation indicates that recombination of the excited Li-like ions through doubly excited levels of the Be-like ions plays an important role in the population kinetics of the Li-like ions. 收起