本篇論文研究了在5S1/2+5P1/2極限，85銣分子0+u能階的凝聚損耗（trap-loss）光譜。在磁光聚（magneto-optical trap, MOT）內的凝聚損耗光譜是由於光結合（photoassociation）的作用。
我們建造了磁光陷阱系統，用來冷卻與捕捉85銣原子。在一般的磁光聚條件，我們可獲得5х107個原子，其密度為1010個/立方公分。在磁光陷阱開啟9.8秒後，經過極化梯度冷卻，85銣原子溫度可下降到33μK。低溫將有助於局限85銣原子在偶極光聚（dipole trap）內。偶極光聚的頻率是在D1躍遷下，紅調變100 GHz。典型的偶極光聚所產生的高密度85銣原子，比在磁光聚多了一個數量級。更高密度的冷原子，能夠增強光結合率。
我們也探討了產生磁光聚螢光的凝聚損耗光譜的最佳條件。我們得到了低解析度0+u激發態的凝聚損耗光譜，它是來自於亮磁光聚（bright MOT）的光結合85銣原子。更高的原子密度能夠大大增強冷原子的光結合率。
將來，我們將透過觀測偶極光聚原子的凝聚損耗，偵測光結合。

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