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Title: Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Spectroscopy

Abstract

The research project ''Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Stability'' with sponsor ID ''DE-FG02-04ER41334'' started late-summer 2004 and aims at the investigation of highly excited low-spin states of selected key-nuclei in the vicinity of the particle separation threshold by means of high-resolution gamma-ray spectroscopy in electromagnetic excitation reactions. This work addresses nuclear structures with excitation energies close to the binding energy or highly excited off-yrast states in accordance with the NSAC milestones. In 2005 the program was extended towards additional use of virtual photons and theoretical description of the low-lying collective excitations in the well deformed nuclei.

Authors:
Publication Date:
Research Org.:
Research Foundation of State University of New York, on behalf of SUNY at Stony Brook
Sponsoring Org.:
USDOE - Office of Nuclear Energy, Science and Technology (NE)
OSTI Identifier:
891003
Report Number(s):
01
TRN: US0703163
DOE Contract Number:
FG02-04ER41334
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BINDING ENERGY; COLLECTIVE EXCITATIONS; DEFORMED NUCLEI; EXCITATION; NUCLEAR STRUCTURE; PHOTONS; SPECTROSCOPY; STABILITY

Citation Formats

Dr. Norbert Pietralla. Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Spectroscopy. United States: N. p., 2006. Web. doi:10.2172/891003.
Dr. Norbert Pietralla. Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Spectroscopy. United States. doi:10.2172/891003.
Dr. Norbert Pietralla. Wed . "Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Spectroscopy". United States. doi:10.2172/891003. https://www.osti.gov/servlets/purl/891003.
@article{osti_891003,
title = {Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Spectroscopy},
author = {Dr. Norbert Pietralla},
abstractNote = {The research project ''Nuclear Gamma-Ray Spectroscopy at the Limit of Particle Stability'' with sponsor ID ''DE-FG02-04ER41334'' started late-summer 2004 and aims at the investigation of highly excited low-spin states of selected key-nuclei in the vicinity of the particle separation threshold by means of high-resolution gamma-ray spectroscopy in electromagnetic excitation reactions. This work addresses nuclear structures with excitation energies close to the binding energy or highly excited off-yrast states in accordance with the NSAC milestones. In 2005 the program was extended towards additional use of virtual photons and theoretical description of the low-lying collective excitations in the well deformed nuclei.},
doi = {10.2172/891003},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 29 00:00:00 EST 2006},
month = {Wed Mar 29 00:00:00 EST 2006}
}

Technical Report:

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  • Nuclear reaction data play an important role in nuclear reactor, medical, and fundamental science and national security applications. The wealth of information is stored in internally adopted ENDF-6 and EXFOR formats. We present a complete calculation of resonance integrals, Westcott factors, thermal and Maxwellian-averaged cross sections for Z = 1-100 using evaluated nuclear reaction data. The addition of newly-evaluated neutron reaction libraries, and improvements in data processing techniques allows us to calculate nuclear industry and astrophysics parameters, and provide additional insights on all currently available neutron-induced reaction data. Nuclear reaction calculations will be discussed and an overview of the latestmore » reaction data developments will be given.« less
  • This project addresses the need for improved non-destructive assay techniques for quantifying the actinide composition of spent nuclear fuel and for the independent verification of declared quantities of special nuclear materials at key stages of the fuel cycle. High-energy delayed gamma-ray spectroscopy following neutron irradiation is a potential technique for directly assaying spent fuel assemblies and achieving the safeguards goal of quantifying nuclear material inventories for spent fuel handling, interim storage, reprocessing facilities, repository sites, and final disposal. Other potential applications include determination of MOX fuel composition, characterization of nuclear waste packages, and challenges in homeland security and arms controlmore » verification.« less
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  • Modeling capabilities were added to an existing framework and codes were adapted as needed for analyzing experiments and assessing application-specific assay concepts including simulation of measurements over many short irradiation/spectroscopy cycles. The code package was benchmarked against the data collected at the IAC for small targets and assembly-scale data collected at LANL. A study of delayed gamma-ray spectroscopy for nuclear safeguards was performed for a variety of assemblies in the extensive NGSI spent fuel library. The modeling results indicate that delayed gamma-ray responses can be collected from spent fuel assemblies with statistical quality sufficient for analyzing their isotopic composition usingmore » a 10 11 n/s neutron generator and COTS detector instrumentation.« less