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nuclear quadrupole moment [′nü·klē·ər ′kwäd·rə‚pōl ‚mō·mənt]

(nuclear physics)

The electric quadrupole moment of an atomic nucleus.

Nuclear Quadrupole Moment

the quantity thatcharacterizes the deviation from spherical symmetry of the elec-trical charge distribution in an atomic nucleus. It has the dimen-sion of area and is usually expressed in sq cm. For sphericalsymmetry the nuclear quadrupole moment Q = 0. If a nucleusis extended along the axis of symmetry, then Q is a positivequantity, but if the nucleus is flattened along the axis, it isnegative. The value of the nuclear quadrupole moment variesover a wide range. For example, the nucleus of O, Q = -0.027 X 10^-24 sq cm; for the nucleus of Am Q = +14.9 X 10^-24 sq cm. Large moments are usually positive. Thismeans that when there is a substantial deviation from sphericalsymmetry, the nucleus has the shape of an elongated ellipsoid ofrotation.

V. P. PARFENOVA

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No references found	The interaction of the atomic quadrupole moment with external electric-field gradients, for example those generated by the electrodes of an ion trap, is analogous to the interaction of a nuclear quadrupole moment with the electric field gradients due to the atomic electrons. External-Field Shifts of the [[blank].sup.199][Hg.sup.+] Optical ... by Itano, Wayne M. / Journal of Research of the National Institute of Standards and Technology	Nuclear Model nuclear molecule nuclear moment Nuclear moments Nuclear Munitions Nuclear Non-proliferation Treaty Nuclear Nonproliferation Treaty nuclear number nuclear orientation Nuclear Paramagnetism Nuclear Physics Nuclear Physics, Leningrad Institute of nuclear pile nuclear plaque nuclear polarization Nuclear Polarization, Chemical nuclear polyhedrosis virus nuclear pore complex nuclear potential nuclear potential energy nuclear potential scattering nuclear power Nuclear Power Industry nuclear power plant nuclear propulsion Nuclear Quadrupole Moment nuclear quadrupole resonance Nuclear Quadrupole Resonance NQR nuclear radiation Nuclear Radiation Detectors nuclear radiation spectroscopy nuclear radius Nuclear Reaction nuclear reaction spectrometry Nuclear Reactor Nuclear Reactor Core nuclear receptor superfamily nuclear recoil Nuclear Regulatory Commission nuclear relaxation nuclear resonance nuclear resonance magnetometer nuclear response function nuclear rocket Nuclear Rocket Engine nuclear scattering nuclear sclerosis Nuclear Shell nuclear ship nuclear snow gage nuclear spallation	Nuclear Preliminary Design Review nuclear problem Nuclear Procurement Issues Committee Nuclear Production Contingency Plan Nuclear Production Facility Nuclear proliferation Nuclear Proliferation Treaty nuclear propulsion nuclear propulsion Nuclear Propulsion Officer Candidate Nuclear Propulsion Package Nuclear Propulsion Plant Nuclear Propulsion Training Unit Nuclear protein Nuclear protein Nuclear Protein Database Nuclear Protein Factor Type 1 Nuclear Protein Kinase C Nuclear Protein Tyrosine Kinase Nuclear proteins Nuclear proteins Nuclear Prototype Training Unit nuclear proximity-surface burst Nuclear pumped laser Nuclear quadrapole resonance Nuclear Quadrupole Coupling Constant Nuclear Quadrupole Interaction Nuclear Quadrupole Moment Nuclear quadrupole resonance Nuclear quadrupole resonance Nuclear Quadrupole Resonance NQR Nuclear Quadrupole Resonance-Detection of Land Mines and Explosives Nuclear Quality Assurance Nuclear Quality Assurance Agency Nuclear Quality Assurance Program Office Nuclear Quality Assurance, Level 1 Nuclear radiation Nuclear radiation Nuclear radiation Nuclear Radiation Detectors Nuclear Radiation Shielding Series nuclear radiation spectroscopy Nuclear Radiation Unit nuclear radiology nuclear radius nuclear reaction nuclear reaction Nuclear reaction analysis Nuclear Reaction Data File for Astrophysics nuclear reaction spectrometry Nuclear reactions Nuclear reactions nuclear reactor nuclear reactor nuclear reactor nuclear reactor Nuclear reactor core Nuclear reactor core

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The interaction of the atomic quadrupole moment with external electric-field gradients, for example those generated by the electrodes of an ion trap, is analogous to the interaction of a nuclear quadrupole moment with the electric field gradients due to the atomic electrons.

External-Field Shifts of the [[blank].sup.199][Hg.sup.+] Optical ... by Itano, Wayne M. / Journal of Research of the National Institute of Standards and Technology

Nuclear Non-proliferation Treaty

Nuclear Nonproliferation Treaty

nuclear number

nuclear orientation

Nuclear Paramagnetism

Nuclear Physics