Nuclear anapole moments are parity-odd, time-reversal-even E1 moments of the electromagnetic current operator. Although the existence of this moment was recognized theoretically soon after the discovery of parity nonconservation ~PNC!, its experimental isolation was achieved only recently, when a new level of precision was reached in a measurement of the hyperfine dependence of atomic PNC in Cs...

The parity-violating quasielastic electron scattering response is explored within the context of a model that builds antisymmetrized random phase approximation and Hartree-Fock correlations on a relativistic Fermi gas basis. Particular emphasis is put on the weak-neutral longitudinal response function, since this observable displays a strong sensitivity to isospin correlations: specifically, it...

The longitudinal quasielastic parity-violating electron scattering response is explored within the context of a model that builds antisymmetrized RPA-HF correlations on a relativistic Fermi gas basis. The large sensitivity to nuclear dynamics of this observable, found in previous studies where only pionic correlations were included, is shown to survive in the present model where the effects fro...

Parity nonconservation (PNC) was studied for 24 p-wave neutron resonances in 238U from 10 to 300 eV by measuring the helicity dependence of the total neutron cross section with an improved experimental apparatus. Six resonances show statistically significant (greater than 2.9σ) parity violation. An analysis treating the PNC matrix elements as random variables yields a root-mean-square PNC matri...

There exists in atomic dysprosium a pair of nearly-degenerate levels of opposite parity. These levels are of potential interest for the study of parity non-conservation because the small energy separation enhances level mixing due to weak-interaction processes. In this paper, we review the unique properties of these levels which make them attractive for measurements of parity non-conservation, ...

We examine the pion realization of the short ranged supersymmetric (SUSY) mechanism of neutrinoless double beta decay (0νββ-decay). It originates from the R-parity violating quark-lepton interactions of the SUSY extensions of the standard model of the electroweak interactions. We argue that pions are dominant SUSY mediators in 0νββdecay. The corresponding nuclear matrix elements for potentially...

A model is presented that simultaneously describes shape coexistence and quadrupole octupole collective excitations within a theoretical framework based on the nuclear density functional theory interacting boson model. An optimal interacting-boson Hamiltonian incorporates configuration mixing between normal intruder states, as well degrees of freedom, identified by means self-consistent mean-fi...

Using the axially deformed relativistic Hartree-Fock-Bogoliubov (D-RHFB) model, we explore mechanism behind parity inversion and halo occurrence in $^{11}$Be, which are well reproduced by RHF Lagrangian PKA1. It is illustrated that evidently enhanced deformation effects $\pi$-pseudo-vector $\rho$-tensor couplings PKA1 crucial for correctly describing both even-parity ground state (GS) neutron o...

In this work we formulate the reaction theory of parity violation in compound nuclear states using Feshbach's projection operator formalism. We derive in this framework a complete set of terms that contribute to the longitudinal asymmetry measured in experiments with polarized epithermal neutrons. We also discuss the parity violating spreading width resulting from this formalism. We then use th...

Symmetries and statistical properties in nuclei are closely related. The most striking example is the extremely large enhancement of parity violation in neutron resonances. Statistical distributions can provide information about the underlying character of nuclear properties. Level statistics and electromagnetic transition distributions have been used successfully to provide unique tests of pre...