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利用３５ＭｅＶ的质子束轰击ＴｈＯ２粉末靶，通过(２３２)Ｔｈ（ｐ，３ｎ）反应产生(２３０)Ｐａ核，经用放射化学方法分离出(２３０)Ｐａ核并制成(２３０)Ｐａ→(２３０)Ｕ测量源．用聚乙烯对苯二酸酯固体核径迹探测器记录其发射的重离子径迹．经２４８天的收集，观测到了两个(２３０)Ｕ→(２０８)Ｐｈ＋(２２)Ｎｅ衰变事件，相对于α衰变的分支比为（１．３±０．８）×１０－１４．
The (230) Pa core was produced by the (232) Th (p, 3n) reaction using a 35 MeV proton beam to bombard the ThO2 powder target and the (230) Pa core was resolved by radiochemical methods to produce (230) Pa → U Measurement source. The heavy ion traces emitted by polyethylene terephthalate solid nuclear track detectors were recorded. After 248 days of collection, two (230) U → (208) Ph + (22) Ne decay events were observed, and the branching ratio relative to α decay was (1.3 ± 0.8) × 10-14.