Bochum 1998 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
HK: Hadronen und Kerne
HK 51: Spectroscopy VIII, Fission
HK 51.5: Talk
Wednesday, March 18, 1998, 15:00–15:15, E
60Fe from Superasymmetric Fission — •A. Elhardt1, T. Faestermann1, R. Henkelmann2, K. Knie1, G. Korschinek1, C. Lierse2, G. Rugel1, A. Stippschild2, and A. Stollenwerk3 — 1Technische Universität München, Physik Department — 2Technische Universität München, Institut für Radiochemie — 3Wiederaufarbeitungsanlage Karlsruhe
Up to now fission yields from the low energy neutron induced fission of 235U are only known down to A=69. The high sensitivity for the detection of 60Fe by accelerator mass spectrometry with the gasfilled analysing magnet system (GAMS) at the Munich Tandem Laboratory opens up the possebility to measure for the first time the fission yield for A=60.
60Fe (T1/2=1.5 Myr) is unique because of the missing direct production channels from stable nuclei like (n,γ) or (n,p). To obtain 235U samples irridiated with a large neutron fluence, we have chemically extracted iron from the HAWC (high active waste concentrate) of the pilot reprocessing plant in Karlsruhe.
To estimate the background caused by double neutron capture on 58Fe we have also measured the (n,γ) cross-section of 59Fe. The results will be reported.