Abstract:
SEPARATIONANDIDENTIFICATIONOFNEWISOTOPE239PaYangWeifanMuWantongYuanShuangguiLiZongweiZhangXueqianYuXian(InstituteofModernPhysics,ChineseAcademyofSciences,Lanzhou730000)ABSTRACTnatUtargetsareirradiatedwith50MeV/u18Oions.ThePasamplesourcesseparatedchemicalyaremeasuredusingaHPGedetector.Anewneutron-richisotope,239Pa,hasbeeni-dentifiedforthefirsttimebyobservationofthegrowthanddecayof239Udaughter.Thehalf-lifeof239Pahasbeendeterminedtobe(106±30)min.Keywords239PaChemicalseparationTransferreaction