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New prompt spectral gamma-ray data from the reaction Cf-252(sf) and its implication on present evaluated nuclear data files

Robert Billnert (Institutionen för fundamental fysik, Subatomär fysik) ; F. J. Hambsch ; Andreas Oberstedt ; S. Oberstedt
Physical Review C. Nuclear Physics (0556-2813). Vol. 87 (2013), 2,
[Artikel, refereegranskad vetenskaplig]

We present results from new spectral prompt gamma-ray measurements from the spontaneous fission of Cf-252. Apart from one recent experiment, about four decades have passed since the last dedicated experiments were reported in the literature. Hence, there was a need for a revision. We have measured prompt fission. rays with both cerium-doped LaBr3 and CeBr3 scintillation detectors, both of which exhibit excellent timing and good energy resolution. The emission yield was determined to be nu(gamma) = (8.30 +/- 0.08)/fission and nu(gamma) = (8.31 +/- 0.10)/fission, with the average energy of is an element of(gamma) = (0.80 +/- 0.01) MeV and is an element of(gamma) = (0.80 +/- 0.01) MeV and total energy of E-gamma,E-tot = (6.64 +/- 0.08) MeV and E-gamma,E-tot = (6.65 +/- 0.12) MeV, with the LaBr3 and CeBr3 detectors, respectively. Since the results from the two detectors are in excellent agreement and confirm the historical data, but not those in the present evaluated nuclear data files, we strongly recommend an update.

Nyckelord: scintillation detectors, nai(tl) scintillators, x-ray, lacl3-ce, labr3-ce, fission, identification, performance



Denna post skapades 2013-03-28. Senast ändrad 2013-04-15.
CPL Pubid: 175151

 

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Institutioner (Chalmers)

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

Ämnesområden

Kärnfysik

Chalmers infrastruktur