Cross sections of the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$)${}_{}{}^{39}{}_{}{}^{}\mathrm{K}$ reaction were measured and analyzed. The transition of the $\frac{9}{2^{-}}$ state, which is of weak-coupling nature, is shown to provide an excellent test of coupled-channel Born-approximation theory and the coupled-channel Born-approximation theory analysis for the $L=1\mathrm{}$ problem in the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$) reaction. Calculated two-step contributions to the $L=1\mathrm{}$ transitions in the (${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$) reaction are large enough to affect the phases of their angular distributions.

NUCLEAR REACTIONS ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$), $E=60\mathrm{}$ MeV: measured $\frac{d\sigma }{d\Omega }\left(\theta \right)$. CCBA and DWBA analyses.

Since pion-nucleus elastic scattering data serve as a measure only of the asymptotic behavior of the outgoing pion wave function, it is possible to introduce transformations which alter the wave function only inside the nucleus, leaving the total and elastic differential cross sections unchanged. Examples are presented which illustrate certain ambiguities in attempts to extract optical potential information from elastic scattering data, and which show how such transformations may also be used as a tool to constrain the pion wave function with inelastic scattering and reaction data.

NUCLEAR REACTIONS Pion-nucleus optical potential. Inelastic scattering and reactions. Phase-shift-equicalent potentials. ${\pi }^{+}$-${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, $T_{\pi }=50\mathrm{}$ MeV.

The low-lying levels of ${}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}$ have been studied through use of the ${}_{}{}^{96}{}_{}{}^{}\mathrm{Mo}(p, n\gamma ){}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}$ reaction with the observation of neutrons by the time-of-flight method and the observation of $\gamma$ rays. Excitation functions of the neutrons and of the $\gamma$ rays, and $\gamma -\gamma$ coincidence spectra, were used to construct a ${}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}$ energy level diagram. 45 $\gamma$ rays have been assigned to 35 excited energy levels of ${}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}$, up to 1288 keV in excitation. The $Q$ value for the ${}_{}{}^{96}{}_{}{}^{}\mathrm{Mo}(p, \gamma ){}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}_{\mathrm{gs}}^{}{}_{}{}^{}$ reaction has been determined to be — 3.754 (±0.006) MeV.

NUCLEAR REACTIONS ${}_{}{}^{96}{}_{}{}^{}\mathrm{Mo}(p, n\gamma )$, $E_p=3.7-5.8\mathrm{}$ MeV, enriched targets; measured $Q$, $\gamma$-ray spectra, branching ratios, neutron time-of-flight spectra; deduced ${}_{}{}^{96}{}_{}{}^{}\mathrm{Tc}$ levels, parities.

The plane wave impulse approximation (PWIA) is assessed for $K^{+}$ meson inelastic scattering from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ by comparison with distorted wave impulse approximation (DWIA) calculations. The $K^{+}$-nucleus distortions are directly determined from phenomenological $K^{+}$-nucleon amplitudes. For $E_{\mathrm{lab}}\ge 50$ MeV, use of plane waves enhances the DWIA cross section less than 50%, an effect size comparable to distorted wave calculations with different sets of $K^{+}$-nucleon amplitudes.

NUCLEAR REACTIONS kaon-nucleus inelastic scattering. KMT, DWIA, and PWIA. Calculated $\sigma (\theta , E)$ for ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$. Investigation of distortion effects.

The large, oscillating backward angle cross sections that have been observed in recent ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ + ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ elastic data at $E\left({}_{}{}^{16}{}_{}{}^{}\mathrm{O}\right)=50\mathrm{} \mathrm{and} 55$ MeV are reproduced in an optical-model analysis using Woods-Saxon potentials.

NUCLEAR REACTIONS ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ (${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$), $E=50\mathrm{} \mathrm{and} 55$ MeV; calculated $\sigma \left(\theta \right)$; deduced optical-model parameters.

The threshold energy of the ${}_{}{}^{39}{}_{}{}^{}\mathrm{K}(p, n){}_{}{}^{39}{}_{}{}^{}\mathrm{Ca}$ reaction has been measured to be 7503.8 ± 1.9 keV, confirming the need for a fairly large renormalization of the Gamow-Teller interaction inside ${}_{}{}^{39}{}_{}{}^{}\mathrm{Ca}$. In addition, the result provides a secondary standard for the energy calibration of accelerators.

NUCLEAR REACTIONS ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}(p, n)$, $E_p=5770-5840\mathrm{}$ keV, ${}_{}{}^{39}{}_{}{}^{}\mathrm{K}(p, n)$, $E_p=7480-7530\mathrm{}$ keV, ${}_{}{}^{46}{}_{}{}^{}\mathrm{Ti}(p, n)$, $E_p=7978-8024\mathrm{}$ keV, measured ${\beta }^{+}$ yield. Enriched and natural targets, NE102 detector. Deduced reaction thresholds, renormalization constant for the Gamow-Teller interaction in ${}_{}{}^{39}{}_{}{}^{}\mathrm{Ca}$.

The quasiparticle approach which exactly reduces the three-body Faddeev formalism to an effective two-body theory is a general starting point for deriving approximation schemes. Practical methods, currently in use for solving the effective two-body equations, follow from it as special cases. A new procedure is proposed which is well suited for local nucleon-nucleon interactions containing repulsion. Its effectiveness is tested by calculating the triton binding energy and elastic neutron-deuteron scattering data for the soft-core potentials of Malfliet and Tjon. Particular emphasis is laid on extracting the influence of higher subsystem partial wave contributions of these potentials.

NUCLEAR REACTIONS Three-body scattering theory, approximation methods and their convergence, numerical test in a three-nucleon model with local potential.

Spin cutoff parameters for ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$, ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$, and ${}_{}{}^{30}{}_{}{}^{}\mathrm{P}$ have been deduced from angular distribution measurements for ($\alpha , n$) reactions on ${}_{}{}^{25}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{26}{}_{}{}^{}\mathrm{Mg}$, and ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$. Calculations of the spin cutoff parameter which include the effect of two body interactions are made using the theory of spectral distributions. The results obtained by dividing the space into subspaces and expanding the strength distribution of each in a Gaussian are found to be more reliable than calculating a single Gaussian for the entire space. The comparisons in this study indicate a need for the inclusion of higher moments of the Hamiltonian in the level density expansion.

NUCLEAR REACTIONS ${}_{}{}^{25}{}_{}{}^{}\mathrm{Mg}(\alpha , n)$, ${}_{}{}^{26}{}_{}{}^{}\mathrm{Mg}(\alpha , n)$, ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}(\alpha , n)$, $E_{\alpha }=10-18\mathrm{}$ MeV, measured $\sigma (E_n, \theta )$. Deduced spin cutoff parameters for ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$, ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$, and ${}_{}{}^{30}{}_{}{}^{}\mathrm{P}$; compared spin cutoff parameters with spectral distribution calculations. Natural and enriched targets.

The slowly converging overlap integral appearing in the distorted wave Born approximation analysis of deuteron stripping to decaying states is treated by employing a Gaussian convergence factor to ensure proper convergence. Numerical results are presented and the usefulness of the above technique in handling stripping overlap integrals in the continuum region is discussed.

NUCLEAR REACTIONS ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}(d, p)$ reactions, unbound state, calculated $\sigma (E_p, {\theta }_p)$, $E_D=12.0\mathrm{}$ MeV, method of handling the divergent integrals discussed.

A simple, self-consistent procedure is proposed to approximately calculate the exchange-Coulomb kernel in a resonating-group formulation. By applying this procedure to $\alpha +\alpha$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}$+$\alpha$, and light ion plus ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ systems, it is found that satisfactory results can be obtained in all these cases.

NUCLEAR REACTIONS Scattering theory, exchange-Coulomb interaction.

The proton elastic scattering cross sections for ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ have been measure at eight angles for proton energies from 9.1 to 18.4 MeV. Angular distributions of cross sections and analyzing powers were measured at 20 angles in 7.5° steps over the range of 30° to 155° at ten energies between 10 and 17.5 MeV. A spin-½ on spin-½ phase-shift analysis was performed starting with spin-½ on spin-0 phase shifts obtained from an optical model analysis. The transformation from the ½ on 0 case to the ½ on ½ case, when the second ½ spin is totally ineffective, is presented and utilized. The results suggest that broad resonances are present near $E_x=21.5\mathrm{}$ MeV in ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$.

NUCLEAR REACTIONS ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}(\overrightarrow{p}, p)$; measured $\sigma (E, \theta )$, $E=9.1-18.4\mathrm{}$ MeV; measured $A(E, \theta )$, $E=10-17.5\mathrm{}$ MeV. Phase-shift analyzed. Examined for effects of broad resonances. Enriched targets.

Measured cross sections for the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}(d, \alpha )\alpha$ reaction have been evaluated critically, covering the range 0.06-10 MeV and extrapolation carried out to the low energy region using Gamow plots. The reaction rate parameter $〈\sigma \nu 〉$ for thermonuclear reactions at equilibrium velocity distribution has been determined as a function of the plasma temperature $T$ of the reacting nuclei from the experimental and extrapolated cross section values ($T=2\mathrm{} \mathrm{keV} \mathrm{to} 1.0 \mathrm{MeV}$).

NUCLEAR REACTIONS ${}_{}{}^6{}_{}{}^{}\mathrm{Li}(d, \alpha )$; $E_d=3\mathrm{} \mathrm{keV}-1\mathrm{} \mathrm{MeV}$ thermalized $\sigma \left(E_d\right)$ extrapolation, thermalized $〈\sigma v〉$ optimized integration.

The Marchenko approach to the inverse scattering problem is utilized to generate the half-off-shell transition amplitude from the experimental ${}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ $n-p$ phase-shift data. The numerical procedures are tested for two potential models, and the real symmetric function $\sigma (p, k)$ is obtained.

NUCLEAR REACTIONS Inverse scattering theory, off-shell $T$ matrix from ${}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ $n-p$ data.

Neutron total cross section measurements in the energy range from 30 eV to 500 keV have been made using a pulsed neutron time-of-flight method with a 78.2 m flight path and a nominal resolution of about 0.07 ns/m. From the analysis of the data up to 350 keV we have obtained values of the $s$- and $p$-wave neutron strength functions and of the mean level spacings. These are $S_0=(3.2\mathrm{}\pm 1.4)$, $S_1=(0.68\mathrm{}\pm 0.13)$ in units of ${10}^{-4\mathrm{}}$e${\mathrm{V}}^{-\mathrm{½}}$, ${〈D〉}_{l=0\mathrm{}}=(32\mathrm{}\pm 12)$ keV and ${〈D〉}_{l=1\mathrm{}}=(8\mathrm{}\pm 1)$ keV.

NUCLEAR REACTIONS ${}_{}{}^{58}{}_{}{}^{}\mathrm{Fe}(n, n)$, $E=30\mathrm{} \mathrm{eV} \mathrm{to} 500 \mathrm{keV}$. Measured ${\sigma }_t\mathrm{}\left(E\right)\mathrm{}$, deduced resonance parameters: Resonance energies $E_{\lambda }$, ${\Gamma }_n^0$, ${{\Gamma }_n}^1$, ${〈D〉}_{l=0\mathrm{}}$, ${〈D〉}_{l=1\mathrm{}}$, $S_0$, $S_1$.

Positive-parity states of ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$ were studied in the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\alpha , n)$ ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$ reaction with alpha particles of 20-MeV energy. Using a pulsed beam the mean lifetime of the $\frac{3}{2^{+}}$ state at 313.0 keV was measured to be $\tau =18.2\mathrm{}\pm 0.8$ μsec. This leads to a $B\left(M2\mathrm{}\right)\mathrm{}$ value of 0.0334 Weisskopf units, very close to that of the corresponding $\frac{3}{2^{+}}\to \frac{7}{2^{-}}$ (g.s.) transition in ${}_{}{}^{43}{}_{}{}^{}\mathrm{Sc}$. $\gamma$ decay of the levels in the mirror nucleus ${}_{}{}^{43}{}_{}{}^{}\mathrm{Sc}$ suggests that positive-parity states in ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$, and only these, decay to the ground state predominantly via the isomeric $\frac{3}{2^{+}}$ state. Hence the $\gamma$ rays emitted from positive-parity states are selected by measuring a $\gamma$-ray spectrum in coincidence with the delayed 313.0-keV $\gamma$ rays. Three $\gamma$ rays of 709.4, 1040.0, and 1170.5 keV were observed which lead to ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$ states $\frac{5}{2^{+}}$ (1022.4 keV), $\frac{7}{2^{+}}$ (1483.5 keV), and $\frac{9}{2^{+}}$ (2062.4 keV). As with the corresponding states in ${}_{}{}^{43}{}_{}{}^{}\mathrm{Sc}$, these states form a quasirotational band based on the $\frac{3}{2^{+}}$ state. The Coulomb displacement energies $E_C\left(\mathrm{Ti}\right)-E_C\left(\mathrm{Sc}\right)$ between these ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$-${}_{}{}^{43}{}_{}{}^{}\mathrm{Sc}$ states are large—about 150 keV—and rather spin independent.

NUCLEAR REACTIONS ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\alpha , n\gamma )$; prompt and delayed $n-\gamma$ and $\gamma -\gamma$ coin with $E_{\alpha }=20\mathrm{}$ MeV. Singles $\gamma$-ray spectrum as function of time with pulsed $\alpha$ beam. Deduced for ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$: ${\frac{9}{2}}^{+} \mathrm{}\left(2062.4\right)\mathrm{}\to {\frac{5}{2}}^{+} \mathrm{}\left(1022.4\right)\mathrm{}\to {\frac{3}{2}}^{+} \mathrm{}\left(313.0\right)\mathrm{}\to {\frac{7}{2}}^{-} (\mathrm{g}.\mathrm{s}.\mathrm{})$, ${\frac{7}{2}}^{+} \mathrm{}\left(1483.5\right)\mathrm{}\to {\frac{3}{2}}^{+} \mathrm{}\left(313.0\right)\mathrm{}\to {\frac{7}{2}}^{-} (\mathrm{g}.\mathrm{s}.\mathrm{})$ and ${\frac{1}{2}}^{+} \mathrm{}\left(999\right)\mathrm{}\to {\frac{3}{2}}^{+} \mathrm{}\left(313.0\right)\mathrm{}\to {\frac{7}{2}}^{-}(\mathrm{g}.\mathrm{s}.\mathrm{})$, ${\frac{3}{2}}^{+}$ state: $\tau =18.2\mathrm{}\pm 0.8$ μsec.

Neutron capture $\gamma$-ray measurements have been performed upon enriched samples of ${}_{}{}^{118}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{116}{}_{}{}^{}\mathrm{Sn}$, and ${}_{}{}^{114}{}_{}{}^{}\mathrm{Sn}$ following resonance capture. The $\gamma$ rays, measured with a Ge(Li) detector, have been incorporated in level schemes for ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{117}{}_{}{}^{}\mathrm{Sn}$, and ${}_{}{}^{115}{}_{}{}^{}\mathrm{Sn}$. Spin and parity assignments have been made for many of the levels. Neutron separation energies for ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{117}{}_{}{}^{}\mathrm{Sn}$, and ${}_{}{}^{115}{}_{}{}^{}\mathrm{Sn}$ were determined to be 6484.6±1.5, 6942.9±2.0, and 7545.3±2.0 keV, respectively. The level schemes have been compared with those of heavier Sn isotopes to investigate systematic behavior. Various spectroscopic properties (level energies, electromagnetic moments, and transition rates) of ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{117}{}_{}{}^{}\mathrm{Sn}$, and ${}_{}{}^{115}{}_{}{}^{}\mathrm{Sn}$ were calculated on the basis of a model which pictures these nuclei as being formed by coupling the motion of the odd neutron quasiparticle to the states of the neighboring even-mass core. The experimentally determined level properties of these Sn isotopes have been qualitatively reproduced by these calculations.

NUCLEAR REACTIONS ${}_{}{}^{118}{}_{}{}^{}\mathrm{Sn}(n, \gamma )$, $E=0.3-5.1\mathrm{}$ keV, ${}_{}{}^{116}{}_{}{}^{}\mathrm{Sn}(n, \gamma )$, $E=0.09-1.6\mathrm{}$ keV, ${}_{}{}^{114}{}_{}{}^{}\mathrm{Sn}(n, \gamma )$, $E=0.09-2.4\mathrm{}$ keV; measured $E_{\gamma }$, $I_{\gamma }$. ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$ deduced resonances, $J$. ${}_{}{}^{117,115}{}_{}{}^{}\mathrm{Sn}$, deduced resonances. ${}_{}{}^{119,117,115}{}_{}{}^{}\mathrm{Sn}$ deduced levels, $J$, $\pi$, neutron separation energies. ${}_{}{}^{115,117,119,121,123,125}{}_{}{}^{}\mathrm{Sn}$ systematics. Enriched targets.

NUCLEAR STRUCTURE Weak-coupling model. ${}_{}{}^{119,117,115}{}_{}{}^{}\mathrm{Sn}$ calculated $E\left(\mathrm{level}\right)$, $\mu$, $Q$, $B\left(E2\mathrm{}\right)\mathrm{}$ and $B\left(M1\mathrm{}\right)\mathrm{}$. Comparison with experiment.

The total ($p, n$) reaction cross section for ${}_{}{}^{55}{}_{}{}^{}\mathrm{Mn}$ has been measured as a function of proton energy in the energy range 1.35 to 5.42 MeV with fine resolution (∼5 keV). Several strong isobaric analog resonances have been located in the excitation function. The excitation function, averaged over a 200 keV energy interval has been compared with the optical model, Hauser-Feshbach, and Hauser-Feshbach-Moldauer calculations. The strong isobaric analog resonance at $E_p\sim 1.54$ MeV has been shape analyzed to extract the proton width ${\Gamma }_p$, the spreading width $W$, the spectroscopic factor, and the reduced normalization.

NUCLEAR REACTIONS ${}_{}{}^{55}{}_{}{}^{}\mathrm{Mn}(p, n)$, $E_p=1.35-5.42\mathrm{}$ MeV; measured $\sigma \mathrm{}\left(E\right)\mathrm{}$; optical model and Hauser-Feshbach analysis, isobaric analog resonance analysis.

The ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}(n, n^{\prime }\gamma ){}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$ reaction was employed to obtain neutron inelastic scattering cross sections for nineteen levels in ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$ in the incident neutron energy range 1.11 to 3.32 MeV. These cross sections were deduced from measured $\gamma$-ray production cross sections for thirty-six $\gamma$ rays observed in the decay of ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$ using a 40 ${\mathrm{cm}}^3$Ge (Li) detector. Branching ratios have been determined for forty transitions from levels up to 3016 keV. The pulsed-beam time-of-flight technique was employed for background reduction. The data were corrected for neutron multiple scattering and neutron and $\gamma$-ray attenuation effects. The neutron inelastic scattering cross section data for the nineteen levels are compared to compound nucleus statistical model calculations. On the basis of these calculations and the branching ratios previously assigned spins for states up to 2062 keV have been confirmed. Spin assignments are made for the following states: $2087 \mathrm{keV}(\frac{5}{2} or \frac{7}{2})$, $2153(\frac{11}{2} or \frac{13}{2})$, $2183(\frac{5}{2}, \frac{7}{2}, or \frac{9}{2})$, $2206(\frac{3}{2}, \frac{5}{2}, or \frac{7}{2})$, $2395(\frac{7}{2}, \frac{9}{2}, or \frac{11}{2})$, $2479(\frac{3}{2}, \frac{5}{2}, or \frac{7}{2})$, $2542(\frac{3}{2}, \frac{5}{2}, or \frac{7}{2})$, $2585(\frac{7}{2} or \frac{9}{2})$, $2713(\frac{1}{2} or \frac{3}{2})$, $2781(\frac{3}{2} or \frac{5}{2})$, $2824(\frac{3}{2}-\frac{9}{2})$, and $2962 \mathrm{keV}(\frac{3}{2}, \frac{5}{2}, or \frac{7}{2})$.

NUCLEAR REACTIONS ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}(n, n^{\prime }\gamma )$, $E_n=1.1-3.3\mathrm{}$ MeV; measured $\sigma (E; E_{\gamma }, \theta )$. Deduced ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}(n, n^{\prime })$ cross sections, ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$ decay scheme, $J$, $\gamma$-decay branching ratios.

The ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}(t, p){}_{}{}^{78}{}_{}{}^{}\mathrm{Ge}$ reaction has been performed at a bombarding energy of 17 MeV. Thirteen excited states below 3 MeV excitation are reported with $J^{\pi }$ values obtained by comparison to distorted-wave Born-approximation analysis. A comparison to a dynamical deformation theory is made and the results suggest ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ge}$ is a transitional nucleus nearing spherical shape due to the proximity of the $N=50\mathrm{}$ closed shell.

NUCLEAR REACTIONS ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}(t, p)$, $E=17\mathrm{}$ MeV; measured $\sigma (E_p, \theta )$ ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ge}$ deduced levels, $J^{\pi }$, measured ${}_{}{}^{78}{}_{}{}^{}\mathrm{Ge}$ atomic mass DWBA analysis, magnetic spectrograph.

The ($p, n^{\prime }$) reaction to excited isobaric analog states of ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$ has been observed using a neutron-proton ($n-p$) coincidence technique. The $n-p$ coincidence was essential to reduce the neutron background due to population of the $T_{<}$ states. The states preferentially excited are analogs of the 0.920, 0.921, 1.090, and 1.354 MeV states of ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$ which contain the strength of the 2+ core excitation. These states are observed to decay overwhelmingly to the first-excited (2+) state of ${}_{}{}^{118}{}_{}{}^{}\mathrm{Sn}$. A value for the overall relative proton decay probability was calculated in order to compare the data with predictions of a two-step model of the ($p, n^{\prime }$) reaction. Good agreement with the data was obtained, provided that the imaginary part of the neutron optical potential was reduced by the same factor which previously was found necessary to fit quasi-elastic scattering data.

NUCLEAR REACTIONS ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}(p, n^{\prime }){}_{}{}^{119}{}_{}{}^{}\mathrm{Sb}\left(\mathrm{IAS}\right)$, $E_p=17, 19$ MeV; measured $\sigma (E_p, \theta )$; observed proton decays, obtained two-step DWBA and coupled-channels predictions.