Heavy fragment emission in high energy reactions on heavy nuclei

Abstract

Three prong events, registered in plastic visual detectors have been studied and calculated, and their cross-sections for various targets and various incoming energies have been compared to binary fission cross-sections. Angular, energy and fragment mass distributions are also given

Three Fragment Fission

“…I t has been suggested on the basis of excitation functions determined in these counter experiments that some of the observed ternary fissions should be interpreted as a sequence of two binary fissions of an excited nucleus. Further information about these fissions and those which occur at even higher energies (17,72) is needed before one can decide whether to regard them as a cascade of binary fissions (52) or as some type of ternary division.…”

A spallation neutron source based on Pb target surrounded by U blanket

“…They consist of about 1 mg/cm 2 of 235 U or 232 Th evaporated on Makrofol. Details of the method can be found in the paper by Remy et al, 1970.…”

Hadron multiplicity studies on a combined Pb/U-blanket spallation source: Experimental and simulation benchmark analysis

“…A different SSNTD set up was applied to detect fission reactions induced by neutrons using Lexan foils. Fissionable target with a mass of $300 mg (such as 232 Th) was used for fast neutron (42 MeV) detection [24]. The applied SSNTDs as particle detectors were irradiated with 10 11 protons while the fission detectors with 10 13 protons in order to achieve a well-measured track density.…”

“…The integrated intensity of the beam was 10 13 protons. Proton beam monitoring was performed using activation foils of aluminium [ 27 Al(p,3pn) 24 Na reaction] and copper [Cu(p,x) reactions] [20,21].…”