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Neutron yields from massive lead and uranium targets irradiated with relativistic protons

Abstract : Long-lived isotopes can be transmuted into stable or short-lived elements either by neutron captures or neutron induced fission. The need of a large excess of neutrons has led to the use of accelerator driven sources (ADS). A series of experiments were carried out at the Synchrophasotron/Nuclotron of the Joint Institute for Nuclear Research (JINR) Dubna, using protons of 1.0 GeV. Solid Lead and Uranium targets surrounded by paraffin moderator were irradiated. On the outer surface of the moderator a number of Solid State Track Detectors were placed to monitor neutron spatial distribution. The results showed that the maximum neutron production was reached within the range of one to two proton mean free paths in the target. Then decreasing neutron production follows the proton beam attenuation along the target. Moreover, the results showed both targets neutron production evolution along the target, to be the same. However, neutron flux per incident proton is depended on the target mass, which was found to be higher for the heavier target.
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http://hal.in2p3.fr/in2p3-00025224
Contributor : Dominique Girod <>
Submitted on : Tuesday, December 13, 2005 - 2:45:44 PM
Last modification on : Thursday, April 23, 2020 - 2:26:21 PM

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M. Zamani, M. Fragopoulou, S. Stoulos, M. Manolopoulou, B.A. Kulakov, et al.. Neutron yields from massive lead and uranium targets irradiated with relativistic protons. 22nd International Conference on Nuclear Tracks in Solids, Aug 2004, Barcelone, Spain. pp.410-414, ⟨10.1016/j.radmeas.2005.04.024⟩. ⟨in2p3-00025224⟩

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