We report here an investigation of the de Haas-van Alphen effect in nickel. The results are discussed in terms of the models which have been recently proposed for the band structure of ferromagnetic nickel.

The precursor absorption is found to consist of two peaks at 14.3 and 17 ${\mathrm{cm}}^{-1\mathrm{}}$, respectively. Additional structure, possibly associated with critical gaps seen in tunneling experiments, is discussed.

Measurement of the two-particle one-hole or doorway-state strength function by suitable averaging of ($d, p$) and ($p, p^{\prime }$) cross section is proposed.

At 6.6 GeV/c, the reaction $p+p\to p+{\pi }^{+}+p+{\pi }^{-}$ proceeds dominantly through the $N^{*++}p{\pi }^{-}$ channel. When peripheral $N^{*++}\text{'}\mathrm{s}$ are selected, the $p{\pi }^{-}$ angular distribution reproduces the angular distributions of free ${\pi }^{-}p$ scattering in the c.m. energy range from threshold to 2.0 GeV. The diffraction scattering at the upper end of this energy band can account for the 1.4-GeV $N^{*}$ deduced in recoil-proton spectrum studies.

We report measurements of the relative intensities of ground-state rotational transitions which occur in deformed nuclei following ($\alpha , 3n$) reactions. An analysis of these intensities shows that the emissions (of neutrons and photons) which precede those in the ground-state band remove considerably more angular momentum from the emitting nuclei than one would estimate using a conventional statistical model.

With ${\mathrm{Sn}}^{119m}$ sources in two different chemical forms, high-resolution internal-conversion measurements were made of electron lines from the 23.87-keV $M1\mathrm{}$ transition. It was found that the $5s$ (valence-shell) electron density near the nucleus is about 30% smaller in Sn${\mathrm{O}}_2$ than in white tin; calculations show that roughly 17% of this decrease in $5s$ electron density is compensated for by an increase in the sum of $1s$, $2s$, $3s$, and $4s$ densities. With this information on $s$ electron densities and from the value of the Mössbauer chemical isomer shift between white tin and Sn${\mathrm{O}}_2$, it has been possible to conclude that the nuclear charge radius of the 23.87-keV state of ${\mathrm{Sn}}^{119}$ is 3.3×${10}^{-4\mathrm{}}$ larger than that of the ground state.

We suggest that the broad shoulder observed in recent measurements of the $\mathrm{pd}$ elastic differential cross section at 2 GeV is a double-scattering effect and propose that further measurements be made to test whether double scattering persists at high energies.

SU(3) assignments for baryon resonances can be inferred from the relative phases of the resonant amplitudes in two-body inelastic channels. We give an application to ${Y_1}^{*}$ resonances in the channel $K^{-}+n\to \Lambda +{\pi }^{-}$.