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Title: Time-dependent local and average structural evolution of δ-phase 239Pu-Ga alloys

Journal Article · · MRS Advances
DOI:https://doi.org/10.1557/adv.2016.541· OSTI ID:1324570
 [1];  [2];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of California, Berkeley, CA (United States)
+ Show Author Affiliations

Here, plutonium metal is a very unusual element, exhibiting six allotropes at ambient pressure, between room temperature and its melting point, a complicated phase diagram, and a complex electronic structure. Many phases of plutonium metal are unstable with changes in temperature, pressure, chemical additions, or time. This strongly affects structure and properties, and becomes of high importance, particularly when considering effects on structural integrity over long periods of time [1]. This paper presents a time-dependent neutron total scattering study of the local and average structure of naturally aging δ-phase239Pu-Ga alloys, together with preliminary results on neutron tomography characterization.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1324570
Report Number(s):
LA-UR-16-22439; applab
Journal Information:
MRS Advances, Journal Name: MRS Advances; ISSN 2059-8521
Publisher:
Materials Research Society (MRS)Copyright Statement
Country of Publication:
United States
Language:
English

References (13)

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Vibrational properties of Ga-stabilized δ − Pu by extended x-ray absorption fine structure journal June 2002
Effect of radiation on bulk swelling of plutonium alloys journal April 2007
Effects of self-irradiation in plutonium alloys journal April 2016
Application of X-Ray Absorption Fine Structure Spectroscopy to Materials and Environmental Science journal July 1998
PDF analysis of PuAl alloys local structure journal March 2009
Study by XRD of the lattice swelling of PuGa alloys induced by self-irradiation journal June 2007
Short-range atomic structure of 1 wt. % Ga δ-stabilized plutonium by x-ray-absorption fine-structure spectroscopy journal January 1995
The plutonium-gallium system journal July 1964
Texture analysis with the new HIPPO TOF diffractometer
  • Wenk, H. -R.; Lutterotti, L.; Vogel, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 515, Issue 3 https://doi.org/10.1016/j.nima.2003.05.001
journal December 2003
Neutron Production, Neutron Facilities and Neutron Instrumentation journal January 2006
Local structure and vibrational properties of α -Pu, α -U, and the α -U charge-density wave journal May 2005

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