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Title: Neutron angular distribution in plutonium-240 spontaneous fission

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1341190
Grant/Contract Number:
NA0002534; LA14-FY14-027-PD2J
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 830; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:59:06; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Marcath, Matthew J., Shin, Tony H., Clarke, Shaun D., Peerani, Paolo, and Pozzi, Sara A.. Neutron angular distribution in plutonium-240 spontaneous fission. Netherlands: N. p., 2016. Web. doi:10.1016/j.nima.2016.05.064.
Marcath, Matthew J., Shin, Tony H., Clarke, Shaun D., Peerani, Paolo, & Pozzi, Sara A.. Neutron angular distribution in plutonium-240 spontaneous fission. Netherlands. doi:10.1016/j.nima.2016.05.064.
Marcath, Matthew J., Shin, Tony H., Clarke, Shaun D., Peerani, Paolo, and Pozzi, Sara A.. 2016. "Neutron angular distribution in plutonium-240 spontaneous fission". Netherlands. doi:10.1016/j.nima.2016.05.064.
@article{osti_1341190,
title = {Neutron angular distribution in plutonium-240 spontaneous fission},
author = {Marcath, Matthew J. and Shin, Tony H. and Clarke, Shaun D. and Peerani, Paolo and Pozzi, Sara A.},
abstractNote = {},
doi = {10.1016/j.nima.2016.05.064},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 830,
place = {Netherlands},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nima.2016.05.064

Citation Metrics:
Cited by: 1work
Citation information provided by
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  • This paper reports on a phenomenological scission point model including temperature-dependent shell effects that is used to solve the energy partition problem as a function of mass asymmetry (A{sub 1}/A{sub 2}) for plutonium fission. Relevant fragment data such as average excitation energy {bar E}*(A) and total kinetic energy {ovr TKE}(A{sub 1}/A{sub 2}) are used as the basis for applying a temperature distribution model based on the Modland-Nix theory that includes the full mass number dependence of spectra, a realistic temperature distribution of fragments, a modified center-of-mass (CMS) spectrum ansatz, CMS anisotropy of neutron emission, and competition of neutron and gamma-raymore » emission. The new model describes neutron multiplicity energy, and angular distribution of prompt fission neutrons. Calculated data for {sup 238}Pu, {sup 240}Pu, and {sup 242}Pu spontaneous fission are presented and discussed in comparison with experimental data.« less
  • Data concerning nuclear-charge distribution in fission are evaluated and reported for thermal-neutron-induced fission of /sup 235/U, /sup 233/U, and /sup 239/Pu and for spontaneous fission of /sup 252/Cf. Parameters of the Z/sub p/ and A'/sub p/ empirical models, which describe, respectively, charge dispersion for constant mass number and mass number dispersion for constant atomic number, are derived from the evaluated data. The various yields calculated from the models are compared with experimental data, and estimate of uncertainties in the calculated yields are deduced from the results of these comparisons. Evaluated experimental independent yields and errors are supplemented by values estimatedmore » from the models, and the combined yield sets are normalized to achieve mass and charge balance and reported as recommended independent-yield sets based on the Z/sub p/ model. Similarly determined alternative independent-yield sets based on the A'/sub p/ model are also given. The recommended and alternative independent-yield sets are used to derive element yields, Y(Z), yields for each neutron number, Y(N), and delayed-neutron yields, which require delayed-neutron-emission probabilities, P/sub n/, from another source. Sums of derived delayed-neutron yields are reasonably consistent with experimental values. The systematic trends for nuclear-charge distribution in fission deduced here are compared to those predicted by a scission-point theoretical model, and nuclear temperatures and relative deformations of nascent fragments are discussed. copyright 1988 Academic Press, Inc.« less
  • Cited by 5