Fragment characteristics from fission of U-238 and U-234 induced by 6.5-9.0 MeV bremsstrahlung
Artikel i vetenskaplig tidskrift, 2011
Fission of U-238 and U-234 induced by bremsstrahlung of 6.5-9.0 MeV endpoint energy has been investigated at the superconducting Darmstadt electron linear accelerator S-DALINAC. Using a twin Frisch grid ionization chamber, fission-fragment energy and mass distributions have been determined by means of the double kinetic-energy technique. Results on the fission-fragment characteristics from U-238(gamma, f) are in agreement with results from the literature. In addition fission-fragment mass and energy distributions from U-234(gamma, f) are presented for the first time in this energy region. An analysis of fission modes within the Brosa model has been performed. The relative yield of the S 1 mode was found to be (13 +/- 3)% in U-234 and (35 +/- 2)% in U-238.
f)
random-neck rupture model
deduced fission reaction
mechanism features
parity violation
photofission
NUCLEAR REACTIONS U-234
emission
neutron energies
nonconservation
model
compound nucleus
using twin Frisch grid ionization chamber
measured fission fragment energy spectra
mass distributions and yields
Comparison with other data and multi-modal
distributions
mass
E=5-9 MeV bremsstrahlung
U-238(gamma
np-237(n
Författare
A. Gook
M. Chernykh
C. Eckardt
J. Enders
P. von Neumann-Cosel
Andreas Oberstedt
Chalmers, Teknisk fysik, Subatomär fysik
S. Oberstedt
A. Richter
Nuclear Physics A
0375-9474 (ISSN)
Vol. 851 1 1-16Ämneskategorier
Atom- och molekylfysik och optik
DOI
10.1016/j.nuclphysa.2010.12.012