| This page and the pages below it are not updated on a regular basis |
| Index | |
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| Atomic Masses & Nuclear Deformations | Nuclear Astrophysics |
| Nuclear Reaction Data | Nuclear Structure & Decay Data |
| Atomic Masses & Nuclear Deformations | |||
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| The masses of the nuclei are the fundamental measure of how
protons and neutrons are bound together to form the matter in the universe,
and they tell how much energy is released or used in nuclear reactions or
released in nuclear decay. Many nuclear masses have been measured over the
years, and models have been developed to attempt to calculate those that
have not or cannot be measured. Here are some assets that you can use:
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| Nuclear Astrophysics | |||
| Nuclear astrophysics involves study of the synthesis of elements and the evolution of cosmic sites where such syntheses occur. Systems as diverse as the early universe, the interstellar medium, red giant stars, and supernova explosions are currently the focus of intense studies utilizing sophisticated computer models -- models which require large quantities of nuclear data as input. Measurements in the nuclear laboratory form the empirical foundation for the current models of element synthesis. In addition to the more general information listed under Atomic Masses & Nuclear Deformations, Nuclear Reaction Data, and Nuclear Structure & Decay Data, some of the specialized information sources for this discipline are: | |||
| Charged Particle Reaction Data: |
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| Atomic Masses & Structure Data: |
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| References: | |||
| Thermonuclear Reaction Rates & Astrophysical S-Factors: |
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| Nuclear Reaction Data | |||
| Bibliographies: | The most fundamental task of any data effort is the establishment
of a well-organized and complete bibliographic database covering the
subject. In the area of nuclear reaction data there are three such systems:
the Computer Index to Neutron Data (CINDA), the Nuclear Science
References File (NSR), and the Photonuclear Data Index. These may be
accessed from the following sites:
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| Evaluated Nuclear Reaction Data: |
The cross sections for nuclear reactions, along with their associated
distributions for secondary particles in energy and angle, are
normally evaluated by combining experimental data with nuclear
models, converted to a standard world-wide format called ENDF
(Evaluated Nuclear Data File), and made available in standard
libraries through national or international nuclear data committees.
Most of the information contained in these libraries are for neutron-induced reactions but there are also data for photon and light charged-particle projectiles (p, d, t, 3He, and The following download links, data browsers, and data viewers are provided to give you alternate convenient methods of access to these evaluated data:
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| Experimental Nuclear Reaction Data: |
The main database for experimental nuclear reaction data is CSISRS/EXFOR.
The data in this system are compiled, exchanged, and distributed by a
world-wide network of
Nuclear
Reaction Data Centers. Information in this database is essentially
complete for neutron-induced reactions and rapidly growing for
charged-particle- and photon-induced reactions. Access to these data is
available from:
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| High-energy Nuclear Reaction Data (E<=150 MeV): |
In addition to the high-energy data contained in the standard evaluated libraries, additional cross section libraries are being developed for various applications. These libraries may be accessed at: | ||
| Neutron Capture Data, Thermal Scattering, & Resonance Integrals: |
Several specialized compilations or evaluations of neutron capture cross sections and other capture data have been performed. Among those available on the World Wide Web are: | ||
| Useful Programs & Client & Helper Applications: |
Members of the US Nuclear Data Program and other national and international
networks have developed programs to aid in their work and to provide easy
access to the data disseminated by the networks to other users. Some of the
programs available are:
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| Nuclear Structure & Decay Data | |||
| Bibliographies: | The most fundamental task of any data effort is the establishment of a well-organized and complete bibliographic database covering the subject. In the area of nuclear structure data the primary resource is the Nuclear Science References File (NSR) which may be accessed from the following sites: Primary scanning responsibility for NSR resides at the National Nuclear Data Center with contributions from other members of the IAEA-sponsored Nuclear Structure and Decay Data Network. | ||
| Evaluated Nuclear Structure & Decay Data: |
Experimental data relevant to nuclear level and gamma properties and nuclear
decay are evaluated by participating members of the
IAEA-sponsored Nuclear
Structure and Decay Data Network and distributed in a standard world-wide
format called ENSDF (Evaluated Nuclear Structure Data File). For A>40,
ENSDF is used to publish these evaluations in the
Nuclear Data Sheets. Data for A<41 are translated into ENSDF from
evaluations published in Nuclear Physics.
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| Experimental Nuclear Structure &
Decay Data: |
XUNDL - Experimental Unevaluated Nuclear Data List. XUNDL (formerly called UNSDF) consists of experimental, unevaluated, nuclear structure data compiled in the Evaluated Nuclear Structure Data File (ENSDF) format. | ||
| Ground- & Metastable-state properties: | Several compact sources of ground- and metastable-state properties are
available. The data in these are generally extracted from ENSDF,
supplemented with other information such as the Atomic Mass Evaluation, and,
sometimes, have some additional evaluation done. Some of the data files and
browsers available are:
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| High-spin & Superdeformation: | Special compilations and evaluations of high-spin bands and superdeformed
bands and fission isomers are performed. The results of this work are
incorporated into the master ENSDF database as rapidly as possible but some
of the data may be more current than ENSDF.
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| Level & Radiation Properties: | Various views of adopted level and radiation properties extracted from ENSDF
and other sources are available. Among these are:
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| Nuclear Moments: |
Evaluations of nuclear moments available include:
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| Radioactive Decay Data: |
The data files and browsers listed here contain radioactive decay data
extracted from ENSDF which has been further processed to include the atomic
radiations associated with nuclear decay. In some cases, these have been
further supplemented with theory where there is no or incomplete
experimental.
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| Thermal Neutron Data: |
Several specialized compilations or evaluations of thermal neutron capture data have been performed. Among those available on the World Wide Web are: | ||
| Useful Programs & Client & Helper Applications: |
Members of the US Nuclear Data Program and other national and international
networks have developed programs to aid in their work and to provide easy
access to the data disseminated by the networks to other users. Some of the
programs available are:
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X-ray & -rayStandards |
IAEA-TECDOC-619
Evaluated Data (XG Standards) - Recommended values of decay parameters
of many common radionuclides routinely used for X-ray and
-ray detector efficiency calibration.
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