Measurements of isomeric cross sections for (n,2n) reaction on 140Ce, 142Nd and 144Sm isotopes around 14 MeV

I. A. Reyhancan*, M. Bostan, A. Durusoy, A. Elmali, A. Baykal, Y. Özbir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In this study, activation cross sections were measured for the 140Ce(n,2n)139mCe, 142Nd(n,2n)141mNd and 144Sm(n,2n)143mSm reactions at six different neutron energies from 13.5 and 14.8 MeV. The fast neutrons were produced via the 3H(d,n)4He reaction on SAMES T-400 neutron generator. The cyclic activation technique was used. Induced γ activities were measured by a high-resolution γ-ray spectrometer with a high-purity germanium (HpGe) detector. Corrections were made for the effects of γ-ray attenuation, dead-time and fluctuation of neutron flux. For these reactions, statistical model calculations for which the pre-equilibrium emission effects are taken into consideration were also performed between 13.6 and 14.8 MeV energy range. Theoretical excitation functions and experimental results were plotted together with previous works.

Original languageEnglish
Pages (from-to)1539-1547
Number of pages9
JournalAnnals of Nuclear Energy
Issue number15
Publication statusPublished - Oct 2003
Externally publishedYes


This work was supported by the International Atomic Energy, Vienna, under Research Contract number 9506/RO and the Research Fund of the University of Istanbul. The authors wish to thank to Dr. G. Tarcan for his excellent technical assistance.

FundersFunder number
International Atomic Energy9506/RO
Istanbul Üniversitesi


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