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Fission product yield measurements using monoenergetic photon beams

Publication ,  Journal Article
Krishichayan, ; Bhike, M; Howell, CR; Tonchev, AP; Tornow, W
Published in: Physical Review C
July 19, 2019

Background: High-accuracy and self-consistent fission product yield (FPY) data are needed to advance microscopic/macroscopic descriptions of the nuclear fission process, to improve the predictive power of phenomenological models, and for applications in nuclear energy, nuclear forensics, and homeland security. Purpose: In a collaboration between the Triangle Universities Nuclear Laboratory (TUNL), Los Alamos National Laboratory (LANL), and Lawrence Livermore National Laboratory (LLNL), the dependence of a number of cumulative FPYs on the incoming neutron energy has been measured and unexpected energy dependencies of certain fission products have been reported [M. E. Gooden, Nucl. Data Sheets 131, 319 (2016)NDTSBA0090-375210.1016/j.nds.2015.12.006]. To investigate whether this observation is unique to neutron-induced fission, a program has been initiated to measure FPYs in photon-induced fission. Method: The photon-induced FPYs were measured by a combination of fission counting using a specially designed dual-fission chamber and γ-ray counting. The measurements were carried out with a monoenergetic photon beam at the HIγS facility. Gamma-ray counting of the activated targets was performed with well-shielded high-purity germanium (HPGe) detectors over a period of two months after irradiation to properly identify the decay history of fission products. Results: We report on our photofission product yield measurements on U235, U238, and Pu239 using a monoenergetic photon beam of Eγ=13MeV. More than 40 fission products were uniquely identified, and their yield values were computed. The use of the fission chamber with post-activation measurements has provided absolute fission product yield data with minimal uncertainties. Conclusion: The photon-induced cumulative fission product yields of U235, U238, and Pu239 are compared with previous photon- and neutron-induced fission measurements. In the near future data will be obtained at lower and higher photon energies.

Duke Scholars

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

July 19, 2019

Volume

100

Issue

1

Related Subject Headings

  • 5106 Nuclear and plasma physics
 

Citation

APA
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ICMJE
MLA
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Krishichayan, ., Bhike, M., Howell, C. R., Tonchev, A. P., & Tornow, W. (2019). Fission product yield measurements using monoenergetic photon beams. Physical Review C, 100(1). https://doi.org/10.1103/PhysRevC.100.014608
Krishichayan, Paul M., M. Bhike, C. R. Howell, A. P. Tonchev, and W. Tornow. “Fission product yield measurements using monoenergetic photon beams.” Physical Review C 100, no. 1 (July 19, 2019). https://doi.org/10.1103/PhysRevC.100.014608.
Krishichayan, Bhike M, Howell CR, Tonchev AP, Tornow W. Fission product yield measurements using monoenergetic photon beams. Physical Review C. 2019 Jul 19;100(1).
Krishichayan, Paul M., et al. “Fission product yield measurements using monoenergetic photon beams.” Physical Review C, vol. 100, no. 1, July 2019. Scopus, doi:10.1103/PhysRevC.100.014608.
Krishichayan, Bhike M, Howell CR, Tonchev AP, Tornow W. Fission product yield measurements using monoenergetic photon beams. Physical Review C. 2019 Jul 19;100(1).

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

July 19, 2019

Volume

100

Issue

1

Related Subject Headings

  • 5106 Nuclear and plasma physics