Abstract
By means of the activation technique the excitation functions for the reactions93Nb(n,2n)92mNb(10.15d),103Rh(n,2n)102mRh(2.9y), and103Rh(n,2n)102gRh(206d) were measured with an average total uncertainty of about ±8% between 10 and 20 MeV neutron energy. In addition the total93Nb(n, 2n) cross-section was compared with the59Co(n, 2n) cross-section at 16.8 MeV by direct neutron detection using the time-of-flight technique. The results are compared with statistical theory, especially with theoretical expectations for the isomeric cross-section ratios, which are only in reasonable agreement with the experiment if one assumes a ground state spinI g=5 for92Nb andI g=2 for102Rh.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
The authors gratefully acknowledge the cooperation of Dr. H. Liskien for part of the work. They are furtheron indebted to the Radionuclide Group of the CBNM for the preparation of the calibration sources and to the Van de Graaff accelerator staff for making possible irradiations of up to 5 days continuous duration. Special thanks are due to Drs. M. Coppola and H.-H. Knitter for placing the time-of-flight spectrometer at the authors' disposal.s
Rights and permissions
About this article
Cite this article
Paulsen, A., Widera, R. The (n, 2n) excitation functions for93Nb and103Rh with special respect to the isomeric states in92Nb and102Rh. Z. Physik 238, 23–34 (1970). https://doi.org/10.1007/BF01399575
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01399575