The Soviet Journal of Atomic Energy

, Volume 2, Issue 1, pp 27–35 | Cite as

Nuclear fission in heavy elements by high-energy particles

  • A. K. Lavrukhina
  • L. D. Krasavina
Article
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Abstract

The results of a radiochemical investigation of nuclear fission in uranium, thorium, and bismuth by protons with an energy of 680 Mev are presented. Using an interpolation method a complete chart of the fission residue products is obtained. It is noted that there is a predominance in the production of nuclei with excess neutrons (58–64%); it is also shown that isotopes with maximum yield lie mainly in the neutron-ex cess region. The probability for symmetric fission is largest in bismuth. The cross sections for fission in uranium and thorium are 55–60% of the geometric cross section; in bismuth it is 5%. The charge distribution of fragments in fission induced by high energy protons is constant and independent of the mass number of the fission fragments and the atomic number of the fissioning nucleus. An analysis of the main features of the fission process seems to indicate that fission in uranium and thorium is due to a combined barrier-emission mechanism.

Keywords

Uranium Bismuth Thorium Interpolation Method Mass Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Consultants Bureau, Inc. 1957

Authors and Affiliations

  • A. K. Lavrukhina
  • L. D. Krasavina

There are no affiliations available

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