■ Abstract Studies of the strangeness-changing hadronic weak interaction have produced a number of puzzles that have evaded a complete explanation within the Standard Model. Their origin may lie either in dynamics peculiar to weak interactions involving strange quarks or in more general aspects of the interplay between strong and weak interactions. In principle, studies of the strangeness-conse...

An IUCF-LANL-Princeton collaboration has been formed to measure the weak mixing between single-particle states in 207~b.132 The experiment was originally motivated by recent measurements at the Los Alamos Neutron Scattering Center by the TRIPLE c~l labora t ion .~ '~ As discussed below, it is now understood that the experiment has the potential of measuring the isoscaler weak amplitude in n ~ c...

Several mechanisms have been proposed for signature inversion in the structure of A ∼ 80 odd-odd nuclei, but the corresponding theoretical calculations have not been conclusive. In the present work, the angular momentum projected shell model (PSM) is applied to the study of the nuclei Rb. The results of the calculations regarding the positive parity yrast band for the configuration πg9/2 ⊗ νg9/...

One hundred and fifty years ago, Charles Darwin’s on the Origin of Species explained the evolution of species through evolution by natural selection. To date, there is no simple piece of evidence demonstrating this concept across species. Chargaff’s first parity rule states that complementary base pairs are in equal proportion across DNA strands. Chargaff’s second parity rule, inconsistently fo...

Rotational levels of molecular free radicals can be tuned to degeneracy by using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings of opposite-parity states have been proposed for use in the study of parity-violating interactions and other applications. We experimentally study a typical manifestation of this system using BaF138. Using a Stark-m...

Experimental investigations of the proton ρp(r) and neutron ρn(r) densities in heavy nuclei are very important for testing of various nuclear models. The densities are also important for many applications like, for example, precise calculations of atomic parity nonconservation. While the charge distribution (proton density) is known pretty well mainly due to data on the elastic electron scatter...

Forms of the beta-decay interaction are sought which are totally symmetric and totally antisymmetric to the interchange of any two of the particles involved in the emission, It is found that there is no symmetric interaction and one antisymmetric. The antisymmetric interaction allows transitions without change of parity and with a change of nuclear spin of either 0 or ~1, including 0~0. First f...

It is proved that quasi-exactly soluble potentials corresponding to an oscillator with harmonic, quartic and sextic terms, for which the n + 1 lowest levels of a given parity can be determined exactly, may be approximated by WKB equivalent potentials corresponding to deformed anharmonic oscillators of SUq(1,1) symmetry, which have been used for the description of vibrational spectra of diatomic...

The interpretation of future precise experiments on atomic parity violation in terms of parameters of the Standard Model could be hampered by uncertainties in the atomic and nuclear structure. While the former can be overcome by measurement in a series of isotopes, the nuclear structure requires knowledge of the neutron density. We use the nuclear Hartree–Fock method, which includes deformation...