skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Isotopic molybdenum total neutron cross section in the unresolved resonance region

Abstract

Accurate isotopic molybdenum nuclear data are important because molybdenum can exist in nuclear reactor components including fuel, cladding, or as a high yield fission product. High-resolution time-of-flight neutron transmission measurements on highly enriched isotopic metallic samples of 95Mo, 96Mo, 98Mo, and 100Mo were performed in the resonance energy range from 1 to 620 keV. The measurements were taken with the newly developed modular 6Li-glass transmission detector positioned at the 100-m experimental flight station. For the unresolved energy region (URR), new comprehensive methods of analysis were developed and validated in order to obtain accurate neutron total cross-section data from the measurement by correcting for background and transmission enhancement effects. Average parameters and fits to the total cross section for 95Mo were obtained using the Hauser-Feshbach statistical model code FITACS, which is currently incorporated into the SAMMY code. Moreover, fits to the experimental data deviate from the current evaluated nuclear data file/B-VII.1 isotopic Mo evaluations by several percent in the URR.

Authors:
 [1];  [2];  [2];  [2];  [2];  [1];  [1];  [1];  [1];  [3];  [1]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States)
  2. Bechtel Marine Propulsion Corp., Schenectady, NY (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1261460
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Bahran, R., Barry, D., Block, R., Leinweber, G., Rapp, M., Daskalakis, A., Blain, E., Williams, D., McDermott, B., Leal, L., and Danon, Y. Isotopic molybdenum total neutron cross section in the unresolved resonance region. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.92.024601.
Bahran, R., Barry, D., Block, R., Leinweber, G., Rapp, M., Daskalakis, A., Blain, E., Williams, D., McDermott, B., Leal, L., & Danon, Y. Isotopic molybdenum total neutron cross section in the unresolved resonance region. United States. doi:10.1103/PhysRevC.92.024601.
Bahran, R., Barry, D., Block, R., Leinweber, G., Rapp, M., Daskalakis, A., Blain, E., Williams, D., McDermott, B., Leal, L., and Danon, Y. Tue . "Isotopic molybdenum total neutron cross section in the unresolved resonance region". United States. doi:10.1103/PhysRevC.92.024601.
@article{osti_1261460,
title = {Isotopic molybdenum total neutron cross section in the unresolved resonance region},
author = {Bahran, R. and Barry, D. and Block, R. and Leinweber, G. and Rapp, M. and Daskalakis, A. and Blain, E. and Williams, D. and McDermott, B. and Leal, L. and Danon, Y.},
abstractNote = {Accurate isotopic molybdenum nuclear data are important because molybdenum can exist in nuclear reactor components including fuel, cladding, or as a high yield fission product. High-resolution time-of-flight neutron transmission measurements on highly enriched isotopic metallic samples of 95Mo, 96Mo, 98Mo, and 100Mo were performed in the resonance energy range from 1 to 620 keV. The measurements were taken with the newly developed modular 6Li-glass transmission detector positioned at the 100-m experimental flight station. For the unresolved energy region (URR), new comprehensive methods of analysis were developed and validated in order to obtain accurate neutron total cross-section data from the measurement by correcting for background and transmission enhancement effects. Average parameters and fits to the total cross section for 95Mo were obtained using the Hauser-Feshbach statistical model code FITACS, which is currently incorporated into the SAMMY code. Moreover, fits to the experimental data deviate from the current evaluated nuclear data file/B-VII.1 isotopic Mo evaluations by several percent in the URR.},
doi = {10.1103/PhysRevC.92.024601},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 2,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}

Works referenced in this record:

Photoneutron cross sections for Mo isotopes: A step toward a unified understanding of ( γ , n ) and ( n , γ ) reactions
journal, July 2013


Spin and parity assignments for Mo 94 , 95 neutron resonances
journal, December 2007


Initial MCNP6 Release Overview
journal, December 2012

  • Goorley, T.; James, M.; Booth, T.
  • Nuclear Technology, Vol. 180, Issue 3
  • DOI: 10.13182/NT11-135

The Probability Table Method for Treating Unresolved Neutron Resonances in Monte Carlo Calculations
journal, December 1972

  • Levitt, Leo B.
  • Nuclear Science and Engineering, Vol. 49, Issue 4
  • DOI: 10.13182/NSE72-3

Benchmarking ENDF/B-VII.1, JENDL-4.0 and JEFF-3.1.1 with MCNP6
journal, December 2012


Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data
journal, December 2012


Statistical fluctuations and intermediate structures in nuclear reaction cross sections
journal, December 1964


JENDL-4.0: A New Library for Innovative Nuclear Energy Systems
journal, August 2011

  • Shibata, K.; Iwamoto, O.; Nakagawa, T.
  • Journal of the Korean Physical Society, Vol. 59, Issue 2(3)
  • DOI: 10.3938/jkps.59.1046

Generalization of the SPRT Method for the Modeling of the Neutron Cross Sections in the Unresolved Resonance Range
journal, May 2009

  • Rich, E.; Noguère, Gilles; Jean, C. De Saint
  • Nuclear Science and Engineering, Vol. 162, Issue 1
  • DOI: 10.13182/NSE162-76

Generalized Nuclear Data: A New Structure (with Supporting Infrastructure) for Handling Nuclear Data
journal, December 2012


Molybdenum and AND Zirconium Neutron Total Cross Section Measurements in the Energy Range 0.5 TO 20 MeV
journal, August 2011

  • Rapp, M. J.; Danon, Y.; Saglime, F. J.
  • Journal of the Korean Physical Society, Vol. 59, Issue 2(3)
  • DOI: 10.3938/jkps.59.1745

Resonance Parameters and Uncertainties Derived from Epithermal Neutron Capture and Transmission Measurements of Natural Molybdenum
journal, March 2010

  • Leinweber, G.; Barry, D. P.; Burke, J. A.
  • Nuclear Science and Engineering, Vol. 164, Issue 3
  • DOI: 10.13182/NSE08-76

Fluctuations in Neutron Total Cross Sections
journal, June 1967


The OpenMC Monte Carlo particle transport code
journal, January 2013


The Ame2003 atomic mass evaluation
journal, December 2003


Intermediate structure and doorway states in nuclear reactions
journal, February 1967


Average neutron resonance parameters and radiative capture cross sectins for the isotopes of molybdenum
journal, October 1976


ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data
journal, December 2011


Fast-neutron cross sections of the even isotopes of molybdenum
journal, January 1973


Photoneutron target development for the RPI linear accelerator
journal, December 1999

  • Overberg, M. E.; Moretti, B. E.; Slovacek, R. E.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 438, Issue 2-3
  • DOI: 10.1016/S0168-9002(99)00878-5