Dielectronic recombination of the Cd⁺ (4d¹⁰5s²S_1/2) ion via formation of the 4d⁹5s²5p³\( {D}_1^0 \) Cd atom autoionization state and its radiative decay to the 4d¹⁰5p^{2 3}P_J autoionization states were detected and studied in intersecting electron and ion beams using UV spectroscopy. The 4d⁹5s²5p³\( {D}_1^0 \) → 4d¹⁰5p^{2 3}P₀ radiative transition is found to be the strongest. The effective cross-section of the dielectronic recombination at the maximum equals (5.0 ± 2.0) × 10^–17 cm², which is comparable with those for electron excitation of the spectral lines (including resonance ones) of the investigated ion. Radiative decay of the 4d⁹5s²5p³\( {D}_1^0 \) autoionization state has a high probability due to interconfigurational interaction (4d¹⁰5s5p + 4d¹⁰5p5d + 4d⁹5s²5p + 4d⁹5p³).

Cd ⁺（4 d ¹⁰ 5 s ² S _1/2）离子通过形成4 d ⁹ 5 s ² 5 p ³ \（{D} _1 ^ 0 \） Cd原子自电离态及其辐射衰减进行电子复合到4 d ¹⁰ 5 p ^{2 3} P _J的自电离状态已被检测并使用紫外光谱在相交的电子束和离子束中进行了研究。4 d ⁹ 5 s ² 5 p ³ \（{D} _1 ^ 0 \） →4 d ¹⁰5 p ^{2 3} P _0的辐射跃迁最强。双电子复合的有效截面最大等于（5.0±2.0）×10 ^–17 cm ²，与被研究离子的光谱线（包括共振线）的电子激发相当。由于互构相互作用，4 d ⁹ 5 s ² 5 p ³ \（{D} _1 ^ 0 \）的辐射衰减具有很高的概率（4 d ¹⁰ 5 s 5p + 4 d ¹⁰ 5 p 5 d+ 4 d ⁹ 5 s ² 5 p + 4 d ⁹ 5 p ³）。