Abstract
Delayed fission events due to isomeric fission have been produced using He3 and He4 beams from the MP Tandem Van de Graaff accelerator. The isomeric nuclei which recoil from the target and subsequently fission in flight were detected by a square cone array of polycarbonate foil detectors mounted along the beam direction. From the distribution of fission tracks along the detector foils, half-lives in the nanosecond region were deduced.
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U.S. National Science Foundation Senior Postdoctoral Fellow, on leave from Florida State University, Tallahassee.
We wish to thank Dr.Hans Körner for his assistance in running these experiments and for valuable discussions. We are especially indebted to the radiochemistry group at Kernforschungszentrum, Karlsruhe, and for the special assistance given by Prof. Dr.Seelman-Eggebert, Dr. P.Wolf, Dr. H.Münzel, and Mr.Reinhard by the preparation of the very fine targets used in this work. The authors wish to acknowledge useful discussions with various members of the Copenhagen group, in particular with S.Bjørnholm and J.Pedersen, and express appreciation for their communication of results prior to publication.
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Metag, V., Repnow, R., von Brentano, P. et al. Fission isomerism induced by helium ions. Z. Physik 226, 1–6 (1969). https://doi.org/10.1007/BF01392778
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DOI: https://doi.org/10.1007/BF01392778