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Fragment characteristics from fission of U-238 and U-234 induced by 6.5-9.0 MeV bremsstrahlung

A. Gook ; M. Chernykh ; C. Eckardt ; J. Enders ; P. von Neumann-Cosel ; Andreas Oberstedt (Institutionen för fundamental fysik, Subatomär fysik) ; S. Oberstedt ; A. Richter
Nuclear Physics A (0375-9474). Vol. 851 (2011), 1, p. 1-16.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: NUCLEAR REACTIONS U-234,U-238(gamma, f), E=5-9 MeV bremsstrahlung, measured fission fragment energy spectra, mass distributions and yields, using twin Frisch grid ionization chamber, deduced fission reaction, mechanism features, Comparison with other data and multi-modal, random-neck rupture model, parity violation, neutron energies, compound nucleus, mass, nonconservation, distributions, photofission, emission, np-237(n, model



Denna post skapades 2014-01-20. Senast ändrad 2016-08-26.
CPL Pubid: 192882

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)

Ämnesområden

Atomfysik

Chalmers infrastruktur