Entry distribution of 220Th: A method to determine the fission barrier of an unstable nucleus

A. Heinz, T. L. Khoo, P. Reiter, I. Ahmad, P. Bhattacharyya, J. Caggiano, M. P. Carpenter, J. A. Cizewski, C. N. Davids, W. F. Henning, R. V.F. Janssens, G. D. Jones, R. Julin, F. G. Kondev, T. Lauritsen, C. J. Lister, D. Seweryniak, S. Siem, A. A. Sonzogni, J. UusitaloI. Wiedenhöver

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


In a fusion-evaporation reaction the total gamma-energy and multiplicity after particle evaporation - the so-called entry distribution - can be used to estimate the height of the fission barrier as function of angular momentum. This method is especially favorable for unstable nuclei, for which the fission barrier is otherwise very difficult to measure. Here, we have measured the entry distributions of 220Th at beam energies of 206 MeV and 219.5 MeV in the 176Yb(48Ca,4n) reaction. The results are compared to a previous measurement using photofission.

Original languageEnglish (US)
Pages (from-to)458-463
Number of pages6
JournalNuclear Physics A
Issue number1-4
StatePublished - Feb 12 2001

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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