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

Title: Energy Splitting of the Ground-State Doublet in the Nucleus {sup 229}Th

Abstract

The energy splitting of the {sup 229}Th ground-state doublet is measured to be 7.6{+-}0.5 eV, significantly greater than earlier measurements. Gamma rays produced following the alpha decay of {sup 233}U (105 {mu}Ci) were counted in the NASA/electron beam ion trap x-ray microcalorimeter spectrometer with an experimental energy resolution of 26 eV (FWHM). A difference technique was applied to the gamma-ray decay of the 71.82 keV level that populates both members of the doublet. A positive correction amounting to 0.6 eV was made for the unobserved interband decay of the 29.19 keV state (29.19{yields}0 keV)

Authors:
; ; ; ;  [1];  [2]; ; ;  [3]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  3. NASA Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)
Publication Date:
OSTI Identifier:
20951206
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevLett.98.142501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA DECAY; CALORIMETERS; ELECTRON BEAMS; ENERGY RESOLUTION; EV RANGE 01-10; EV RANGE 10-100; GAMMA RADIATION; GROUND STATES; KEV RANGE 10-100; SPECTROMETERS; THORIUM 229; URANIUM 233; X RADIATION

Citation Formats

Beck, B. R., Becker, J. A., Beiersdorfer, P., Brown, G. V., Moody, K. J., Wilhelmy, J. B., Porter, F. S., Kilbourne, C. A., and Kelley, R. L. Energy Splitting of the Ground-State Doublet in the Nucleus {sup 229}Th. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.142501.
Beck, B. R., Becker, J. A., Beiersdorfer, P., Brown, G. V., Moody, K. J., Wilhelmy, J. B., Porter, F. S., Kilbourne, C. A., & Kelley, R. L. Energy Splitting of the Ground-State Doublet in the Nucleus {sup 229}Th. United States. doi:10.1103/PHYSREVLETT.98.142501.
Beck, B. R., Becker, J. A., Beiersdorfer, P., Brown, G. V., Moody, K. J., Wilhelmy, J. B., Porter, F. S., Kilbourne, C. A., and Kelley, R. L. Fri . "Energy Splitting of the Ground-State Doublet in the Nucleus {sup 229}Th". United States. doi:10.1103/PHYSREVLETT.98.142501.
@article{osti_20951206,
title = {Energy Splitting of the Ground-State Doublet in the Nucleus {sup 229}Th},
author = {Beck, B. R. and Becker, J. A. and Beiersdorfer, P. and Brown, G. V. and Moody, K. J. and Wilhelmy, J. B. and Porter, F. S. and Kilbourne, C. A. and Kelley, R. L.},
abstractNote = {The energy splitting of the {sup 229}Th ground-state doublet is measured to be 7.6{+-}0.5 eV, significantly greater than earlier measurements. Gamma rays produced following the alpha decay of {sup 233}U (105 {mu}Ci) were counted in the NASA/electron beam ion trap x-ray microcalorimeter spectrometer with an experimental energy resolution of 26 eV (FWHM). A difference technique was applied to the gamma-ray decay of the 71.82 keV level that populates both members of the doublet. A positive correction amounting to 0.6 eV was made for the unobserved interband decay of the 29.19 keV state (29.19{yields}0 keV)},
doi = {10.1103/PHYSREVLETT.98.142501},
journal = {Physical Review Letters},
number = 14,
volume = 98,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2007},
month = {Fri Apr 06 00:00:00 EDT 2007}
}