2,389 research outputs found
Many-body corrections to the nuclear anapole moment II
The contribution of many-body effects to the nuclear anapole moment were
studied earlier in [1]. Here, more accurate calculation of the many-body
contributions is presented, which goes beyond the constant density
approximation for them used in [1]. The effects of pairing are now included.
The accuracy of the short range limit of the parity violating nuclear forces is
discussed.Comment: 18 pages, LateX2e, 7 figure
Many Body Corrections to Nuclear Anapole Moment
The many body contributions to the nuclear anapole moment of Cs,
Tl, PB, and Bi from the core polarization are
calculated in the random-phase approximation with the effective residual
interaction. Strong reduction of a valence nucleon contribution was found
provided by the core polarization effects. The contribution of the core
particles to the anapole moment compensates this reduction to large extent
keeping the magnitude of nuclear anapole moment close to its initial single
particle value.Comment: 14 pages, latex, no figures, ps-file available at
http://www.inp.nsk.su/preprint/prep95.htm
Anapole moment of an exotic nucleus
We demonstrate that there is no appreciable enhancement of the anapole moment
of Be. The effect of small energy intervals is compensated for by a
small overlap of the halo neutron wave function with core.Comment: 5 pages, LaTe
Superflow-Stabilized Nonlinear NMR in Rotating 3He-B
Nonlinear spin precession has been observed in 3He-B in large counterflow of
the normal and superfluid fractions. The new precessing state is stabilized at
high rf excitation level and displays frequency-locked precession over a large
range of frequency shifts, with the magnetization at its equilibrium value.
Comparison to analytical and numerical calculation indicates that in this state
the orbital angular momentum L of the Cooper pairs is oriented transverse to
the external magnetic field in a ``non-Leggett'' configuration with broken
spin-orbit coupling. The resonance shift depends on the tipping angle theta of
the magnetization as omega - omega_L = (Omega_B^2 / 2 omega_L)(cos(theta) -
1/5). The phase diagram of the precessing modes with arbitrary orientation of L
is constructed.Comment: Revtex file, 5 pages, 4 figures, version submitted to Phys. Rev. Let
Quantum conductivity corrections in two dimensional long-range disordered systems with strong spin-orbit splitting of electron spectrum
We study quantum corrections to conductivity in a 2D system with a smooth
random potential and strong spin-orbit splitting of the spectrum. We show that
the interference correction is positive and down to the very low temperature
can exceed the negative correction related to electron-electron interactions.
We discuss this result in the context of the problem of the metal-insulator
transition in Si-MOSFET structures.Comment: 8 pages, no figure
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