放射性~ 6 He ~+离子的Paul俘获及其β衰变的直接观测
Paul trapping of radioactive 6He+ions and direct observation of their beta-decay
摘要：
我们证明了大量的短寿命β不稳定离子可以被困在一个新的透明保罗陷阱，他们的衰变产物可以直接检测到的巧合。低能6 He+（807毫秒半衰期）离子从GANIL的SPIRAL源中提取，然后通过缓冲气体冷却技术进行减速、冷却和聚束。在六天的测量期间，储存了超过10^8个离子，并记录了β粒子和6Li^{++}反冲离子之间约10^5个衰变符合。该技术可以扩展到其他短寿命物种，为陷阱辅助衰变实验开辟新的可能性。
英文摘要：
We demonstrate that abundant quantities of short-lived beta unstable ions can be trapped in a novel transparent Paul trap and that their decay products can directly be detected in coincidence. Low energy 6He+ (807 ms half-life) ions were extracted from the SPIRAL source at GANIL, then decelerated, cooled and bunched by means of the buffer gas cooling technique. More than 10^8 ions have been stored over a measuring period of six days and about 10^5 decay coincidences between the beta particles and the 6Li^{++} recoiling ions have been recorded. The technique can be extended to other short-lived species, opening new possibilities for trap assisted decay experiments.
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