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Precise measurements of the γ -ray intensities following the β decay of Ce 144 and Nd 147

Journal Article · · Physical Review. C
 [1];  [1];  [2];  [2];  [3];  [1];  [1];  [1];  [1];  [4];  [5];  [4];  [2];  [5];  [1];  [2];  [4];  [6];  [3];  [4]
  1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Univ. of California, Irvine, CA (United States)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States)
  5. Univ. of California, Berkeley, CA (United States)
  6. Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
For many fission products, the γ rays emitted following β decay provide an easily detectable signature that can be used to identify their quantities and distributions in a sample. As a result, γ-ray spectroscopy is often exploited to study fission-product yields, provided sufficiently accurate information on the γ-ray intensities is available. Further, in many cases, the uncertainties in the existing nuclear data are large enough that they compromise the precision achievable for modern experiments and applications. In this paper, we present high-precision results for the absolute γ-ray emission intensities for the most intense transitions in the β decays of 144Ce and 147Nd. We measured these intensities to ≲1% accuracy by producing radiopure samples with fission-product beams at CARIBU and detecting the emitted radiation with a 4⁢πβ counter and a meticulously efficiency-calibrated high purity germanium detector at Texas A&M University.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-06CH11357; AC52-07NA27344; FG03-93ER40773; NA0000979; NA0003841
OSTI ID:
2473633
Alternate ID(s):
OSTI ID: 2473935
Report Number(s):
LLNL--JRNL-869734; 1106506
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 110; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (35)

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