Gourt > Science > Physics > Nuclear (12)
Nuclear physics is the branch of physics concerned with the nucleus of the atom. It has three main aspects: probing the fundamental particles (protons and neutrons) and their interactions, classifying and interpreting the properties of nuclei, and providing technological advances.
Nuclei do not lend themselves to exact theoretical understanding, because they are composed of many particles (mesons as well as protons and neutrons), but are not large enough to be accurately described as periodic, as done with crystals. So "nuclear models" that, singly or in combination, account for most nuclear behavior are used. Three of the four types of fundamental interaction play important roles in nuclei, the strong, electromagnetic and, on a longer time scale, weak.
Nuclei are held together by strong interactions (mostly exchanging pions), but electromagnetic repulsion of the positively charged protons tends to push them apart, according to Coulomb's law. The stable nuclei all have close to the lowest energy ratio of protons to neutron for their atomic weight. Nuclei near enough to this ratio to be bound but not close enough to be stable, give off electrons or positrons (beta decay) or take in electrons (and also give off neutrinos), to move closer to that ratio. This is the main place where the weak interactions come in. Nuclei that are too massive to be stable are pulled apart by the coulomb repulsion of their protons and either fission or give off alpha particles.
More on [ Nuclear physics ]
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@GozdeZorlu just wrote about that for FT http://blogs.ft.com/scienceblog/2009/12/16/astronomy-and-nuclear-physics-face-more-cuts/
jjmilton (Joseph Milton) Wed, 16 Dec 2009 20:03:08 -0000
@GozdeZorlu just wrote about that for FT http://blogs.ft.com/scienceblog/2009/12/16/astronomy-and-nuclear-physics-face-more-cuts/
Panda News: Nuclear physics hit hardest by STFC cuts - New Scientist (blog): Nuclear physics hit hardest by STFC cu... http://bit.ly/5Ph7Mr
panda (Panda) Wed, 16 Dec 2009 19:30:31 -0000
Panda News: Nuclear physics hit hardest by STFC cuts - New Scientist (blog): Nuclear physics hit hardest by STFC cu... http://bit.ly/5Ph7Mr
Astronomy and nuclear physics face more cuts: By Joseph Milton, FT science intern Lord Drayson, science minister, m... http://bit.ly/6XtO7U
ftscienceblog (FT Science Blog) Wed, 16 Dec 2009 18:49:15 -0000
Astronomy and nuclear physics face more cuts: By Joseph Milton, FT science intern Lord Drayson, science minister, m... http://bit.ly/6XtO7U
@ErzuliesVoodoo what, Nuclear Physics?
chrisapps (Chris Apps) Wed, 16 Dec 2009 18:22:02 -0000
@ErzuliesVoodoo what, Nuclear Physics?
in other news: pope 'quite religious' RT @RogerHighfield Nuclear physics hit hardest by STFC cuts. http://bit.ly/77gVyb #stfc
AntibodyBoy (Alex Taylor) Wed, 16 Dec 2009 18:15:48 -0000
in other news: pope 'quite religious' RT @RogerHighfield Nuclear physics hit hardest by STFC cuts. http://bit.ly/77gVyb #stfc
RT @RogerHighfield: S word. Nuclear physics hit hardest by STFC cuts. http://bit.ly/77gVyb #stfc
AntibodyBoy (Alex Taylor) Wed, 16 Dec 2009 18:14:39 -0000
RT @RogerHighfield: S word. Nuclear physics hit hardest by STFC cuts. http://bit.ly/77gVyb #stfc
ABCs of Nuclear Science - A very detailed introduction to nuclear science.
American Nuclear Society - Resources on nuclear science and technology: nuclear engineering, nuclear medicine, nuclear energy, nuclear physics, nuclear power, food irradiation, and nuclear news.
Meta Description: [ The premier professional society serving the nuclear industry. Online offerings include meeting information, nuclear news, publications, member services, a career center, public information, and many other resources. ]
Association Vinçotte Nuclear - Belgium nuclear regulatory institute. Objectives, studies and reports.
Brookhaven Nuclear Wallet Cards - Selected properties of all known nuclides and their known isomeric states.
Canadian Penning Trap - Precision atomic mass measurements on stable and exotic nuclei using the Canadian Penning Trap Mass Spectrometer (CPTMS) situated ar Argonne National Laboratory, IL, USA.
Meta Description: [ Precision atomic mass measurements on stable and exotic nuclei with the Canadian Penning Trap Mass Spectrometer (CPTMS) situated at Argonne National Laboratory, IL, USA ]
CdTe and CdZnTe Crystal Growth and Production of Gamma Detectors - Semiconductor gamma radiation detectors prepared from Bridgman growth crystals.
Meta Description: [ Semiconductor fast response detectors and arrays are fabricated from crystals
that grow by the Bridgman method. ]
DOE Preprint Network, Fission and Nuclear Technologies - Searchable gateway to preprint servers at U.S. Department of Energy.
Global Energy - A new scientific award for outstanding theoretical, experimental and applied research, development, inventions and discoveries in the field of energy development and power generation.
Meta Description: [ International Energy Prize Global Energy ]
INIS - Web directory to nuclear information by the International Atomic Energy Agency (IAEA).
Meta Description: [ Annotated Internet Directory of the International Atomic Energy Agency (IAEA). ]
Isotope Explorer - Nuclear data software.
500
Joint Institute for Nuclear Research - An intergovernmental organization created in order to unify the intellectual and material potential of Member States to study the fundamental properties of matter.
Lasers Split the Atom - The reactions that lead to nuclear power or an atomic blast.
Meta Description: [ The reactions that lead to nuclear power or an atomic blast can now be initiated with laser light, allowing researchers to run new types of nuclear physics experiments. ]
National Nuclear Data Center - The most comprehensive and complete nuclear data resource on the Web. In 2004 NNDC Web site had 560K database retrievals and users from more than 11000 organizations.
Meta Description: [ National Nuclear Data Center Web Site ]
NSREC - Nuclear and Space Radiation Effects Conference.
Meta Description: [ IEEE sponsored meeting presenting the latest techniques for enhancing performance of microelectronic circuits used in radiation environments ]
Nuclear Data Project (NDP) - Devoted to the collection and evaluation of nuclear structure and astrophysics data. The work includes dissemination of compilations, evaluations, and codes via internet- and www-based information services, as well as publication in journals.
Nuclear physics - A description of nuclear physics and its applications.
Meta Description: [ An introduction into nuclear physics ]
Nuclear Physics - Provides an introduction to atoms, radioactivity and the structure of a nuclear bomb.
Nuclear Science and Technology - Presents information on nuclear science and technology and how our everyday lives are influenced through it.
Oak Ridge National Laboratory - Basic research in nuclear and atomic physics.
ORIP XXI Program Complex (Software Suite) FREEWARE - ORIP XXI software suite (FREEWARE) is intended for studying of isotope transmutation chains under a neutron irradiation in a reactor.
ORNL High Flux Isotope Reactor Facility - One of the world's most powerful research reactors. Produces transuranium isotopes for research, industrial, and medical applications and is used in neutron-scattering experiments to reveal the structure and dynamics of materials, including metals and polymers. Oak Ridge, Tennessee.
The World of Nuclear Science - An interactive educational resource about nuclear science.
University of Birmingham - Research Groups in Nuclear Physics - Includes information about postgraduate admissions, lists of staff, publications and seminars, and brief introductions to the research that is undertaken.
Meta Description: [ Research Groups in the Nuclear Physics Group ]
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