Decay data of <sup>140</sup>La for nuclear forensics

POSTER

Abstract

Complete characterization of 235U fission and the decay of its fission fragments is important to develop a database for nuclear forensics applications. In pursuit of this goal, β- decay has been characterized for 140La. 140La has significance in nuclear forensics for dating nuclear events when its relative abundance to the parent 140Ba is taken. Gamma spectra were collected with Gammasphere, currently located at ANL. The 140La sample measured was created through neutron capture at the UMass Lowell reactor. Using calibrated spectra from140La, previously observed levels have been confirmed and intensities measured, and new levels and transitions proposed are supported by coincidence spectroscopy. Preliminary results on the revised decay scheme and precision intensities will be presented.

*This work was sponsored by the Office of NP, Office ofScience of the U.S. DOE, under Contract No. DE-AC02-98CH10886 through Brookhaven National Lab and Contract No. DE-AC02-06CH11357 through Argonne National Lab. This project was supported in part by the U.S.Department of Energy, Office of Science, Office of Work-force Development for Teachers and Scientists (WDTS) underthe Science Undergraduate Laboratory Internships Program(SULI). This project was supported by the U.S. Department of Energy, National Nuclear Security Administration, Office of Defense Nuclear Nonproliferation Research and Development.

Presenters

  • Jenna N Ocheltree

    • Wellesley College

Authors

  • Jenna N Ocheltree

    • Wellesley College

  • Elizabeth McCutchan

    • Brookhaven National Laboratory

  • Andrea Mattera

    • Brookhaven National Laboratory
    • BNL

  • Shaofei Zhu

    • Brookhaven National Laboratory
    • Brookhaven National Lab
    • Argonne National Laboratory

  • Marian Jandel

    • University of Massachusetts Lowell

  • Peter C Bender

    • University of Massachusetts Lowell