Puzzle of the {sup 6}Li Quadrupole Moment: Steps toward Solving It
- Institute of Nuclear Physics, Moscow State University, Vorob'evy gory, Moscow, 119899 (Russian Federation)
The problem of the origin of the quadrupole deformation in the {sup 6}Li ground state is investigated with allowance for the three-deuteron component of the {sup 6}Li wave function. Two long-standing puzzles related to the tensor interaction in the {sup 6}Li nucleus are known: that of an anomalous smallness of the {sup 6}Li quadrupole moment (being negative, it is smaller in magnitude than the {sup 7}Li quadrupole moment by a factor of 5) and that of an anomalous behavior of the tensor analyzing power T{sub 2q} in the scattering of polarized {sup 6}Li nuclei on various targets. It is shown that a large (in magnitude) negative exchange contribution to the {sup 6}Li quadrupole moment from the three-deuteron configuration cancels almost completely the 'direct' positive contribution due to the {alpha}d folding potential. As a result, the total quadrupole moment proves to be close to zero and highly sensitive to fine details of the tensor nucleon-nucleon interaction in the {sup 4}He nucleus and of its wave function.
- OSTI ID:
- 20692830
- Journal Information:
- Physics of Atomic Nuclei, Vol. 68, Issue 7; Other Information: Translated from Yadernaya Fizika, ISSN 0044-0027, 68, 1165-1178 (No. 7, 2005); DOI: 10.1134/1.1992566; (c) 2005 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); TN:; ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CLUSTER MODEL
DEFORMED NUCLEI
DEUTERONS
GROUND STATES
HEAVY ION REACTIONS
HELIUM 4
LITHIUM 6
LITHIUM 7
MASS NUMBER
NUCLEAR DEFORMATION
NUCLEAR ELECTRIC MOMENTS
NUCLEAR FORCES
NUCLEON-NUCLEON INTERACTIONS
OPTICAL MODELS
POLARIZATION
POLARIZATION-ASYMMETRY RATIO
POTENTIALS
QUADRUPOLE MOMENTS
TENSORS
WAVE FUNCTIONS