Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Executive Committee 
 Postdocs 
 Visitors 
 Students 
 Research 
 Publications 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 Quantum Lunch Archive 
 P/T Colloquia 
 Archive 
 Ulam Scholar 
 
 Postdoc Nominations 
 Student Requests 
 Student Program 
 Visitor Requests 
 Description 
 Past Visitors 
 Services 
 General 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Wednesday, April 19, 2017
2:00 PM - 3:00 PM
MPA-CMMS Conference Room, TA-3, Bldg 32

CMS Colloquium

Using actinide L3-edge resonant x-ray emission spectroscopy (RXES) to measure valence and delocalization effects in intermetallics such as URu2Si2

Corwin Booth
Lawrence Berkeley National Laboratory

While conventional L3-edge x-ray absorption near-edge structure (XANES) spectroscopy has proven to be a relatively easy and accurate way of measuring 4f-orbital occupancy in lanthanide materials, the utility of the technique in actinide materials is limited by the more delocalized nature of the 5f orbital. Some of these limitations can be deemphasized with resonant x-ray emission spectroscopy (RXES) techniques. In this talk, I will demonstrate all of these effects in a range of materials, showing examples of strong delocalization in transition metal systems, strong localization in lanthanide systems, and a mixture of effects in actinide systems, including results on a highly localized 5f system, UCd11, under applied pressure. All of these examples lead to a more in-depth discussion of recent results on URu2Si2 and how data on this material relate to measurements on dozens of other actinide intermetallic systems, consistent with a partially occupied and delocalized 5f orbital.

Host: Eric Bauer