Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U

Pierson, Bruce D.; Prinke, A. M.; Greenwood, L. R.; Stave, S. C.; Wittman, R. S.; Burch, J. G.; Burke, J. T.; Padgett, S. W.; Ressler, J. J.; Slavik, G.; Tamashiro, A.; Tonchev, A.; Younes, W.

doi:10.1016/j.nds.2019.01.005

Title: Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on ²³⁵U

Abstract

Two isotopically-characterized targets of high-purity (99.84±0.03%) ²³⁵U-oxide and a neutron dosimetry package were exposed to a pulsed neutron irradiation using the Godiva critical assembly at the National Criticality Experiments Research Center. Following irradiation, the fissioned targets were counted with a broad-energy germanium detector. Estimates of the total fissions for each target were made using measurements of well-known fission products. The total fission values were then used to measure the fission yields of 21 fission products with half-lives between 636 and 119,700 seconds. Mean values of seventeen of the measured fission products fell within the 95% confidence level of the Evaluated Nuclear Data Files VII.1/b (ENDF/B-VII.1) using the larger of the two uncertainties: ^84gBr, ⁸⁹Rb, ⁹¹Sr, ⁹³Y, ⁹⁷Zr, ¹⁰¹Mo, ¹⁰⁵Ru, ¹²⁸Sn, ¹²⁹Sb, ^130gSb, ¹³¹Sb, ^131mTe, ¹³³I, ¹³⁵I, ¹⁴¹Ba, ¹⁴²Ba, and ¹⁴²La. Seven isotopes were measured to better precision than is listed in the ENDF/B-VII.1 database: ⁸⁹Rb, ⁹³Y, ¹²⁸Sn, ¹²⁹Sb, ^130gSb, ^131mTe, and ¹³³I. Four of the measured isotopes were found to be statistically different from the ENDF/B-VII.1 database: ⁹⁴Y, ¹³⁴Te, ¹³⁴I, and ¹³⁸Xe. Two of the isotopic analyses conducted in this paper fit the parent and daughter data simultaneously. The parent-daughter pairs measured in this way were the ¹³⁴Te/I and ¹⁴²Ba/Lamore »« less

Authors:

Pierson, Bruce D. ^[1]; Prinke, A. M. ^[1]; Greenwood, L. R. ^[1]; Stave, S. C. ^[1]; Wittman, R. S. ^[1]; Burch, J. G. ^[2]; Burke, J. T. ^[2]; Padgett, S. W. ^[2]; Ressler, J. J. ^[2]; Slavik, G. ^[2]; Tamashiro, A. ^[2]; Tonchev, A. ^[2]; Younes, W. ^[2]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Thu Jan 24 00:00:00 EST 2019

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

OSTI Identifier:: 1580022

Alternate Identifier(s):: OSTI ID: 1501612

Report Number(s):: LLNL-JRNL-783000; PNNL-SA-132098
Journal ID: ISSN 0090-3752; 970933; TRN: US2102187

Grant/Contract Number:: AC52-07NA27344; AC05-76RL01830

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Data Sheets

Additional Journal Information:: Journal Volume: 155; Journal Issue: C; Journal ID: ISSN 0090-3752

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 42 ENGINEERING

Citation Formats


                    Pierson, Bruce D., Prinke, A. M., Greenwood, L. R., Stave, S. C., Wittman, R. S., Burch, J. G., Burke, J. T., Padgett, S. W., Ressler, J. J., Slavik, G., Tamashiro, A., Tonchev, A., and Younes, W. Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U.  United States: N. p., 2019. 
Web.  doi:10.1016/j.nds.2019.01.005.

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                    Pierson, Bruce D., Prinke, A. M., Greenwood, L. R., Stave, S. C., Wittman, R. S., Burch, J. G., Burke, J. T., Padgett, S. W., Ressler, J. J., Slavik, G., Tamashiro, A., Tonchev, A., & Younes, W. Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U.  United States.  https://doi.org/10.1016/j.nds.2019.01.005

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                    Pierson, Bruce D., Prinke, A. M., Greenwood, L. R., Stave, S. C., Wittman, R. S., Burch, J. G., Burke, J. T., Padgett, S. W., Ressler, J. J., Slavik, G., Tamashiro, A., Tonchev, A., and Younes, W. Thu .  
"Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U".  United States.  https://doi.org/10.1016/j.nds.2019.01.005.  https://www.osti.gov/servlets/purl/1580022.

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@article{osti_1580022,

  title        = {Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U},

  author       = {Pierson, Bruce D. and Prinke, A. M. and Greenwood, L. R. and Stave, S. C. and Wittman, R. S. and Burch, J. G. and Burke, J. T. and Padgett, S. W. and Ressler, J. J. and Slavik, G. and Tamashiro, A. and Tonchev, A. and Younes, W.},

  abstractNote = {Two isotopically-characterized targets of high-purity (99.84±0.03%) 235U-oxide and a neutron dosimetry package were exposed to a pulsed neutron irradiation using the Godiva critical assembly at the National Criticality Experiments Research Center. Following irradiation, the fissioned targets were counted with a broad-energy germanium detector. Estimates of the total fissions for each target were made using measurements of well-known fission products. The total fission values were then used to measure the fission yields of 21 fission products with half-lives between 636 and 119,700 seconds. Mean values of seventeen of the measured fission products fell within the 95% confidence level of the Evaluated Nuclear Data Files VII.1/b (ENDF/B-VII.1) using the larger of the two uncertainties: 84gBr, 89Rb, 91Sr, 93Y, 97Zr, 101Mo, 105Ru, 128Sn, 129Sb, 130gSb, 131Sb, 131mTe, 133I, 135I, 141Ba, 142Ba, and 142La. Seven isotopes were measured to better precision than is listed in the ENDF/B-VII.1 database: 89Rb, 93Y, 128Sn, 129Sb, 130gSb, 131mTe, and 133I. Four of the measured isotopes were found to be statistically different from the ENDF/B-VII.1 database: 94Y, 134Te, 134I, and 138Xe. Two of the isotopic analyses conducted in this paper fit the parent and daughter data simultaneously. The parent-daughter pairs measured in this way were the 134Te/I and 142Ba/La pairs. The fission yield results obtained in this way are unique, especially for 134I, because the parent and daughter half-lives are so close. Here, given the limited number of direct measurements of the 134Te/I pair from fast neutron induced fission and the seemingly high estimate for 134Te from previous work, it is likely that the value in this paper is more accurate; however, additional measurements of this pair are needed to validate this assertion.},

  doi          = {10.1016/j.nds.2019.01.005},

  journal      = {Nuclear Data Sheets},

  number       = C,

  volume       = 155,

  place        = {United States},

  year         = {Thu Jan 24 00:00:00 EST 2019},

  month        = {Thu Jan 24 00:00:00 EST 2019}

}

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Title: Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U

Abstract

Citation Formats

Reducing uncertainties for short lived cumulative fission product yields journal, September 2015

Fission Product Yields from 232Th, 238U, and 235U Using 14 MeV Neutrons journal, January 2017

Measurements of Actinide-Fission Product Yields in Caliban and Prospero Metallic Core Reactor Fission-Neutron Fields journal, April 2012

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On-line system for the isolation and study of 0.5 to 30 second selenium fission products with simultaneous suppression of daughter bromine activity journal, June 1982

Chemical reactions of fission products with ethylene using the gas jet technique journal, December 1994

Transport of fission products with a helium gas-jet at TRIGA-SPEC journal, February 2010

Recent Results from Lohengrin on Fission Yields and Related Decay Properties journal, May 2014

Gamma-ray spectroscopy of short-lived fission products using the recoil separator ?Lohengrin? journal, September 1975

On-line separation of isotopes at a reactor in studsvik (OSIRIS) journal, January 1971

β -decay study of neutron-rich bromine and krypton isotopes journal, July 2013

Fission of Am 241 with 14.8-MeV neutrons journal, November 1979

Low-Yield Products from Fission of Th 232 , U 235 , and U 238 with 14.8-MeV Neutrons journal, June 1969

The SPIDER fission fragment spectrometer for fission product yield measurements journal, July 2015

Gamma-Ray Spectrum obtained with a Lithium-drifted p–i–n Junction in Germanium journal, February 1962

Application of high resolution lithium-drift germanium gamma-ray spectrometers to high energy gamma-rays journal, February 1964

Geant4—a simulation toolkit journal, July 2003

NuDat 2.0: Nuclear Structure and Decay Data on the Internet conference, January 2005

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Charge distributions in low-energy nuclear fission and their relevance to fission dynamics journal, May 1981

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Title: Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on ²³⁵U

Reducing uncertainties for short lived cumulative fission product yields
journal, September 2015

Fission Product Yields from 232Th, 238U, and 235U Using 14 MeV Neutrons
journal, January 2017

Measurements of Actinide-Fission Product Yields in Caliban and Prospero Metallic Core Reactor Fission-Neutron Fields
journal, April 2012

Godiva II—An Unmoderated Pulse-Irradiation Reactor
journal, December 1960

The helium-jet recoil transport method
journal, September 1969

On-line system for the isolation and study of 0.5 to 30 second selenium fission products with simultaneous suppression of daughter bromine activity
journal, June 1982

Chemical reactions of fission products with ethylene using the gas jet technique
journal, December 1994

Transport of fission products with a helium gas-jet at TRIGA-SPEC
journal, February 2010

Recent Results from Lohengrin on Fission Yields and Related Decay Properties
journal, May 2014

Gamma-ray spectroscopy of short-lived fission products using the recoil separator ?Lohengrin?
journal, September 1975

On-line separation of isotopes at a reactor in studsvik (OSIRIS)
journal, January 1971

$β$ -decay study of neutron-rich bromine and krypton isotopes
journal, July 2013

Fission of ${}^{241}{Am}$ with 14.8-MeV neutrons
journal, November 1979

Low-Yield Products from Fission of ${Th}^{232}$ , $U^{235}$ , and $U^{238}$ with 14.8-MeV Neutrons
journal, June 1969

The SPIDER fission fragment spectrometer for fission product yield measurements
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journal, February 1962

Application of high resolution lithium-drift germanium gamma-ray spectrometers to high energy gamma-rays
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Geant4—a simulation toolkit
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