高剥离态Fe Ⅹ Ⅵ离子能级寿命测量

Lifetime measurements of the highly charged Na-like Fe Ⅹ Ⅵ ions

在原子能院串列加速器上,利用束箔方法,测量了能量为30 MeV Fe离子产生的高剥离态谱线跃迁结构的寿命值.在30 MeV时,Fe通过箔膜的电荷态分布在7+到17+,我们选择Fe XⅥ2p^6(~1S)4p—2p^6(~1S)5d(~2P_(3/2)~o—~2D_(3/2))的谱线,谱线波长124.696(?),能级寿命为79±4 ps.最后对实验误差进行了分析.

Experimental lifetimes of highly charged iron ions have been measured using the beam-foil technique at tandem accelerator HI-13 at China Institute of Atomic Energy （CIAE）. The ionization states of the 30 MeV Fe ions through a carbon foil were from Ⅷ to ⅩⅧ. We studied an Fe ⅩⅥ line at 124. 696 A which has been assigned to the transition 2p6（1S）4p-2ps（1S）5d（2P0 3/2-2D3/2）, and the lifetime result is 79±4 ps. We also discussed the experimental errors subsequently.