$\mathrm{CP}$ noninvariance with $\left|\Delta T\right|>\mathrm{}\frac{1}{2}$ and $\mathrm{CPT}$ invariance implies that the partial rates, ${\mathcal{r}}_{\pm }$, for $K^{\pm }\to {\pi }^0+{\pi }^{\pm }$, and also the partial rates, ${{\mathcal{r}}_{\pm }}^1$ for $K^{\pm }\to \gamma +{\pi }^0+{\pi }^{\pm }$, will be unequal. An approximate phenomenological analysis is formulated, and suggests the possibility of $|1-(\frac{{\mathcal{r}}_{-}}{{\mathcal{r}}_{+}}\left)\right|\cong {10}^{-3\mathrm{}}$ and $\left(\frac{{{\mathcal{r}}_{-}}^1}{{{\mathcal{r}}_{+}}^1}\right)\cong 3$.

Transitions to loosely bound excited-hole states of the manganese acceptor and photoionization to the valence band are observed. The manganese ionization energy is consistent with that predicted from conduction-electron capture luminescence, but optical-phonon-assisted transitions are lower in intensity.

The temperature-modulated reflectance, $\frac{\Delta R}{R}$, of gold films has been measured from 2 to 10 eV. The range of modulated reflectance experiments is thus extended into the vacuum ultraviolet. The observed structure, which is much more complex than the conventional reflectance spectra, is of considerable significance to band-structure studies.

It is shown that exciton states exist in metals, occurring near the interband threshold in optical absorption and substantially altering the shape and strength of the absorption edge. Their relation to the corresponding donor states is discussed.

We have measured the change in the dielectric constant of SbSI caused by illumination. The change is positive below the Curie temperature and negative above. The result is discussed in connection with the strain caused by illumination reported previously.

Using the relation between polarization $\overrightarrow{\mathrm{P}}$ and electron displacement $\overrightarrow{\mathrm{\xi }}$ obtained by Prakash and Vachaspati, it is shown that Adler misses some terms in the polarization due to two simultaneously incident electromagnetic waves because he presumes a linear relation between $\overrightarrow{\mathrm{P}}$ and $\overrightarrow{\mathrm{\xi }}$.

The excess tunneling current due to inelastic electron-molecule interactions near the metal-insulator interface is calculated. The expression for the second derivative of this excess current is proportional to the dipole spectral weight function of the molecule.

Nonlinear behavior of conduction and valence electrons in semiconductors and semimetals due to nonparabolic or warped energy bands exhibits resonance behavior in magnetic fields which increases the nonlinear excitation by many orders of magnitude for intraband and interband transitions. Higher harmonics generated by the electrons in warped parabolic energy surfaces are linear in electric field at high powers of incoming radiation.

Single-particle wave functions which describe the elastic scattering of low-energy neutrons have been calculated from nonlocal optical potentials constructed in terms of the fundamental nucleon-nucleon interaction and the ground-state wave function of the target. It has been found that these single-particle wave functions are greatly reduced in the nuclear interior in comparison with those generated from equivalent phenomological local and nonlocal optical potentials.