Recent Articles

Total Cross Section of Neutrons on Deuterium in the keV Region

P. Stoler, N. N. Kaushal, and F. Green

Phys. Rev. C 8, 1539 (1973) - Published 1 October, 1973

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Recoil in ( ${}^{16}O$ , ${}^{15}N$ ) Reactions on $2 s - 1 d$ - and $1 f - 2 p$ -Shell Nuclei

R. M. DeVries

Phys. Rev. C 8, 1542 (1973) - Published 1 October, 1973

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The recently published data and nonrecoil distorted-wave Born-approximation (DWBA) calculations of Maher et al. are compared with exact recoil DWBA predictions to quantitatively study recoil effects on single-nucleon-transfer heavy-ion reactions on medium-mass targets at energies $\sim 10$ MeV above the Coulomb barrier.

Solar Neutrinos from the ${}^{3}{He} (p, e^{+} ν) {}^{4}{He}$ Reaction

Carl Werntz and J. G. Brennan

Phys. Rev. C 8, 1545 (1973) - Published 1 October, 1973

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The cross section for the $β^{+}$ decay of continuum states of ${}^{4}{Li}$ has been recalculated using and improved normalization for the $S$ -wave proton inside the nucleus and the newly measured value of the thermal-neutron capture cross section of ${}^{3}{He}$ . In addition, the contributions of first-forbidden transitions have been added. The new value of the $S$ factor is found to be 8.1 × $10^{- 20}$ keV b, too small for this reaction to produce a measureable flux of solar neutrinos on Earth.

${}^{51}V ({}^{3}{He}, d) {}^{52}{Cr}$ Reaction and Shell-Model Calculations for ${}^{52}{Cr}$

F. Pellegrini, I. Filosofo, M. I. El Zaiki, and I. Gabrielli

Phys. Rev. C 8, 1547 (1973) - Published 1 October, 1973

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Angular distributions of the ( ${}^{3}{He}, d$ ) reaction on ${}^{51}V$ have been measured at 10.48 MeV with a counter telescope. Spectroscopic factors and $l$ values of ${}^{52}{Cr}$ levels up to 7 MeV excitation energy were obtained by comparing the data with distorted-wave Born-approximation theory. Some unreported levels excited by $l = 1$ proton transfer have been observed. Shell-model calculations predict well the $1 f_{\frac{7}{2}}$ spectroscopic strength, but fail in reproducing the observed $2 p_{\frac{3}{2}}$ strength.

${}^{2}H ({}^{2}H, d p) n$ Reaction

D. I. Bonbright, R. G. Allas, R. O. Bondelid, E. L. Petersen, A. G. Pieper, R. B. Theus, and I. Šlaus

Phys. Rev. C 8, 1551 (1973) - Published 1 October, 1973

Threshold Photoneutron Cross Sections for ${}^{60}{Ni}$ and ${}^{56}{Fe}$

V. V. Verbinski, Hans Weber, and R. E. Sund

Phys. Rev. C 8, 1002 (1973) - Published 1 September, 1973

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The absolute differential cross sections of ${}^{60}{Ni} (γ, n)$ and $Fe (γ, n)$ were measured near the thresholds for ${}^{60}{Ni}$ and ${}^{56}{Fe}$ using time-of-flight techniques to determine the neutron energies. The measurements were taken at 93° to the incident bremsstrahlung beam. Two measurements were made for each target, each with a different bremsstrahlung-beam and-point-energy setting, in order to determine the specific levels to which the neutrons decay. The absolute bremsstrahlung spectra were determined from neutron time-of-flight calibration measurements that utilized the known ${}^{2}H (γ, n)$ reaction cross section. The ${}^{60}{Ni} (γ, n)$ data show numerous peaks in the neutron energy region up to 75 keV; of these, five definitely decay to the ${}^{59}{Ni}$ ground state. The $Fe (γ, n)$ data had strong peaks at neutron energies of 2.1 and 10.0 keV in the laboratory system; the results indicate that the 2.1-keV peak decays to the 0.411-MeV state in ${}^{55}{Fe}$ and that the 10.0-keV peak decays to the ${}^{55}{Fe}$ ground state. Resonance parameters for ${}^{60}{Ni}$ and ${}^{56}{Fe}$ states are given for the observed strong isolated peaks. The experimentally determined $γ$ -ray strength functions are consistent with the single-particle estimate of the electric dipole $γ$ -ray strength function.

Decays of ${}^{26}{Na}$ and ${}^{27}{Na}$

D. E. Alburger, D. R. Goosman, and C. N. Davids

Phys. Rev. C 8, 1011 (1973) - Published 1 September, 1973

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${}^{26}{Na}$ and ${}^{27}{Na}$ were produced in the ${}^{10}B ({}^{18}O, 2 p) {}^{26}{Na}$ and ${}^{11}B ({}^{18}O, 2 p) {}^{27}{Na}$ reactions by bombarding pellets of boron with 42-MeV ${}^{18}O$ ions. ${}^{26}{Na}$ was also studied using the ${}^{18}O ({}^{13}C, p α) {}^{26}{Na}$ reaction at a ${}^{13}C$ beam energy of 35 MeV. After transfer of the target in a rabbit the $β$ and $γ$ rays were measured with NE102 and Ge(Li) detectors. ${}^{26}{Na}$ decays with $T_{\frac{1}{2}} = 1.087 \pm 0.012$ sec and emits 10 $γ$ rays involving 7 excited states of ${}^{26}{Mg}$ . From the end-point energy of $β$ rays in coincidence with 1809-keV $γ$ rays the mass excess of ${}^{26}{Na}$ is found to be -7004 ± 200 keV in agreement with the more accurate data of reaction $Q$ values. ${}^{27}{Na}$ decays with $T_{\frac{1}{2}} = 280 \pm 20$ msec in agreement with a previous measurement. $γ$ rays of 984.77 ± 0.20 and 1698.5 ± 0.5 keV are emitted with relative intensities of 86.0 ± 2.9 and 14.0 ± 2.3, respectively. The spin of ${}^{27}{Na}$ is established as $J^{π} = {\frac{3}{2}}^{+} or {\frac{5}{2}}^{+}$ from these data. From the end-point energy of ${}^{27}{Na}$ $β$ rays in coincidence with 985-keV $γ$ rays, compared with ${}^{26}{Na}$ $β$ rays, the mass excess of ${}^{27}{Na}$ is -5650 ± 180 keV based on the ${}^{26}{Na}$ mass. This result is in fair agreement with a recent direct determination of the ${}^{27}{Na}$ mass.

Fragment-Mass and Kinetic-Energy Distributions from the Spontaneous Fission of ${}^{246}{Cm}$

Frances Pleasonton, Robert L. Ferguson, Franz Plasil, and C. E. Bemis, Jr.

Phys. Rev. C 8, 1018 (1973) - Published 1 September, 1973

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Energies of coincident fission fragments from a thin, spontaneously fissioning ${}^{246}{Cm}$ source were measured with silicon surface-barrier detectors. Pre-neutron-emission mass and total-kinetic-energy distributions were deduced from the data. The average pre-neutron-emission fragment total kinetic energy ${\bar{E}}_{K}$ was found to be 184.2 MeV, in agreement with ${}^{245}{Cm}$ ( $n, f$ ) results. The mass distribution has a peak-to-valley ratio of 142, and is similar to those from other spontaneously fissioning nuclei. Fine structure in the mass distributions from ${}^{245}{Cm} (n, f)$ , ${}^{246}{Cm} (sf)$ , and ${}^{250}{Cm} (sf)$ appears to be associated with fragments of mass $\approx 144$ amu. Predictions for ${\bar{E}}_{K}$ from fission systematics were not found to describe adequately the observed ${\bar{E}}_{K}$ values for the spontaneous fission of Cm isotopes.

Isospin Mixing from the Effective Nucleon Interaction

G. F. Bertsch and B. H. Wildenthal

Phys. Rev. C 8, 1023 (1973) - Published 1 September, 1973

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Effective interactions determined from closed-shell-plus-two-particle spectra have a charge dependence which predicts isospin mixing for more complicated nuclei. We infer the isospin mixing in $A = 44, 46, 48, and 52$ on the basis of the observed $A = 42$ spectra. Agreement with experimental data is reasonable in four out of six cases; the best example is ${}^{44}{Sc}$ , where we verify that the $n - p$ effective residual interaction is stronger than the $n - n$ interaction. We also compare predictions to experiment for isospin mixing in $A = 20 and 24$ , based on the charge dependence seen in the $A = 18$ spectrum.

Decays of ${}^{72}{Kr}$ and ${}^{73}{Kr}$

Cary N. Davids and David R. Goosman

Phys. Rev. C 8, 1029 (1973) - Published 1 September, 1973

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Delayed $γ$ rays following the decay of two new proton-rich Kr isotopes have been observed. These isotopes were produced by the bombardment of ${}^{58}{Ni}$ with ${}^{16}O$ ions, and were separated from contaminant activities by a gas-transfer system. ${}^{72}{Kr}$ decays with a half-life of 17.4 ± 0.4 sec to states in ${}^{72}{Br}$ , with the subsequent emission of six $γ$ rays. ${}^{73}{Kr}$ decays with a half-life of 25.9±0.6 sec to states in ${}^{73}{Br}$ , and emits eight $γ$ rays. Identification of the Kr isotopes was based both on the buildup of their daughters, and on relative intensities of decay $γ$ rays observed at two different ${}^{16}O$ bombarding energies. Decay schemes are presented, and the astrophysical significance of ${}^{72}{Kr}$ is discussed.

$K = 0$ Rotational Bands in ${}^{174}{Yb}$

R. F. Casten, D. Breitig, W. R. Kane, and S. F. Mughabghab

Phys. Rev. C 8, 1035 (1973) - Published 1 September, 1973

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The $γ$ deexcitation of three excited $K = 0$ rotational bands has been studied following population in the ${}^{173}{Yb} (n, γ)$ reaction at resonant neutron energies of 4.53 and 17.7 eV. The $γ$ rays were detected in singles and coincidence with Ge(Li) detectors. Analysis was also made of the primary radiation. The decay properties of these bands exhibit strong deviations from the Alaga ratios. For the lowest excited $K = 0$ band the deexcitation branching ratios resemble those in the even-even Sm, Gd, Yb, and W nuclei. The higher-lying $K = 0$ bands in ${}^{174}{Yb}$ decay similarly to those in ${}^{172}{Yb}$ but considerably differently from the lowest $K = 0$ bands in this region. The pairing-vibrational character of the $K = 0$ bands in ${}^{174}{Yb}$ , as shown by ( $p, t$ ) and ( $t, p$ ) reaction studies, apparently does not greatly alter the relative decay rates for these states. Two-band mixing of each $K = 0$ band with the ground band cannot explain all the observed results, nor can three-band mixing involving the $γ$ vibration. The presence of $M 1$ components in the $I \to I$ transitions could explain some of the anomalous branching ratios but cannot be a complete explanation. It is suggested that multiband mixing including the excited $K = 0$ bands themselves may have to be considered. The two-neutron-transfer-reaction data can also be interpreted in terms of such mixing. The observed similarities between ${}^{174}{Yb}$ and other nuclei in this region suggest a corresponding similarity of mixing effects.

Complete Hydrogen and Helium Particle Spectra from 30- to 60-MeV Proton Bombardment of Nuclei with $A = 12 to 209$ and Comparison with the Intranuclear Cascade Model

F. E. Bertrand and R. W. Peelle

Phys. Rev. C 8, 1045 (1973) - Published 1 September, 1973

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Differential cross sections for the production of proton, deuteron, triton, helium-3, and $α$ particles from as many as 10 targets ( $A = 12 - 209$ ) were measured using 29-, 39-, and 62-MeV incident protons. The particles were detected, with $\approx 0.2$ -MeV [full width at half maximum (FWHM)] energy resolution for protons, over a secondary energy range of $\approx 2 - 6 to 62$ MeV in a total absorption telescope composed of three solid-state detectors. Representative results are shown for cross sections differential in energy and angle, as well as for angle-and energy-integrated cross sections. For incident 60-MeV protons the integral magnitude of the nonevaporation charged-particle production is found to be $\sim 10^{2} A^{\frac{1}{3}}$ mb. Fewer protons but more complex particles were measured for carbon and oxygen targets than expected from an $A^{\frac{1}{3}}$ dependence for either component alone. The continuum cross sections for $z = 1$ particles at a given angle (mb ${sr}^{- 1}$ Me $V^{- 1}$ ) are nearly independent of incident energy when measured with incident protons in the 30- to 60- MeV energy range. Nonevaporation production of complex particles ( $A \geq 2$ ) is 25-40% of that for protons. The proton spectra have been compared with predictions from the intranuclear cascade model. Differential spectral predictions compare well with the measured spectra for angles in the range ∼25-60°, and relatively poor predictions for small and large angles are more favorable when reflection and refraction by the potential well are included. Evidence is given that predictions for backward angles are greatly improved by allowing proton scattering from nucleon pairs within the model nucleus, but the $A$ -dependent underprediction at extreme forward angles is not understood at all. The calculated angle-integrated spectra reproduce the measured spectral shape but consistently predict $\approx 30 %$ too few nonevaporation protons for targets with $A \geq 27$ .

[NUCLEAR REACTIONS ${}^{12}C$ , ${}^{16}O$ , ${}^{27}{Al}$ , ${}^{54}{Fe}$ , ${}^{56}{Fe}$ , ${}^{60}{Ni}$ , ${}^{89}Y$ , ${}^{120}{Sn}$ , ${}^{197}{Au}$ , ${}^{209}{Bi}$ , ( $p, p^{'} X$ ), ( $p, d X$ ), ( $p, t X$ ), ( $p, {}^{3}{He} X$ ), ( $p, α X$ ), $E = 62, 39, 29$ MeV; semi; measured $σ (E; E_{p^{'}}, E_{d}, E_{3_{He}}, E_{α}, θ)$ ; deduced $σ (E)$ . $2 ≲ E_{p^{'}}, E_{d}, E_{t}, E_{3_{He}}, E_{α} ≲ 70$ MeV. Comparisons with intranuclear cascade model.]

Nuclear Scattering of Plane-Polarized Photons

Evans Hayward, W. C. Barber, and Jed Sazama

Phys. Rev. C 8, 1065 (1973) - Published 1 September, 1973

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A beam of plane-polarized monochromatic photons has been produced by the resonance fluorescence of the well-known $1^{+}$ state at 15.1 MeV in ${}^{12}C$ . These have been scattered a second time from natural targets of Cd, Sn, Ta, W, Pt, Au, and Bi. Measurements were made with poor energy resolution of the relative number of photons scattered at 90° parallel and perpendicular to the polarization vector in the incident 15.1-MeV beam. The observation of photons scattered along the polarization vector reflects the contribution of incoherent scattering to the dominant coherent-scattering process and results either from permanent nuclear deformation or from the dynamic deformation produced by the coupling of the giant dipole resonance with the quadrupole oscillations of the nuclear surface. The observed intensities of incoherent scattering are of the same order of magnitude for the deformed nuclei and the spherical vibrators and agree roughly with the predictions of the dynamic collective model. No incoherent scattering was observed from the rigid sphere ${}^{209}{Bi}$ .

Nuclear Magnetic Resonance on Oriented ${}^{101}{Rh}^{m}$

G. Kaindl, F. Bacon, H.-E. Mahnke, and D. A. Shirley

Phys. Rev. C 8, 1074 (1973) - Published 1 September, 1973

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The 4.3-day isomer of ${}^{101}{Rh}$ was oriented in nickel metal by the thermal equilibrium nuclear orientation technique at temperatures down to 3 mK. From an analysis of the temperature dependence of the anisotropies of the 306.8- and 544.8-keV $γ$ rays of ${}^{101}{Ru}$ , the $\frac{E 2}{M 1}$ mixing ratios of these two $γ$ transitions, $δ (306.8) = - 0.10 \pm 0.05$ and $δ (544.8) = - 0.98 \pm 0.10$ , as well as the magnetic hyperfine interaction of $Ni ({}^{101}{Rh}^{m})$ , $| μ H | = (6.2 \pm 0.2) \times 10^{- 18}$ erg, could be derived. In addition, the previously assigned spins of the respective nuclear states of ${}^{101}{Ru}$ at 306.8 and 544.8 keV were both confirmed as 7/2. Nuclear magnetic resonance on oriented Ni( ${}^{101}{Rh}$ ) was observed in an external polarizing field of 1 kOe at a resonance frequency of 206.2 ± 0.4 MHz, yielding a magnetic hyperfine splitting of $| \frac{μ H}{I} | = (1.366 \pm 0.003) \times 10^{- 18}$ erg. As a result both the spin and the magnetic moment of ${}^{101}{Rh}^{m}$ could be determined as $I = \frac{9}{2}$ and $μ (\frac{9}{2}) = (+) {(5.51 \pm 0.09)}_{μ_{B}}$ , corresponding to a nuclear $g$ factor of $g (\frac{9}{2}) = 1.22 \pm 0.02$ . The results confirm the interpretation of ${}^{101}{Rh}^{m}$ as a $1 g_{\frac{9}{2}}$ proton state. The derived value of the $g$ factor is compared with $g$ factors of other $g_{\frac{9}{2}}$ proton states in the neighborhood of the magic proton number 40, and it is found to fit well into the over-all systematics.

Relative Excitations of the ${}^{237}{Pu}$ Shape Isomers

R. Vandenbosch, P. A. Russo, G. Sletten, and M. Mehta

Phys. Rev. C 8, 1080 (1973) - Published 1 September, 1973

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Effect of Fine Structure on Nucleon Transfer to Analog States

C. M. Vincent and H. T. Fortune

Phys. Rev. C 8, 1084 (1973) - Published 1 September, 1973

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We extend our previous distorted-wave Born-approximation treatment of reactions of the form $A (d, p) B$ (in which $B$ is an unbound state) to include the case where $B$ is (a) dissolved into a fine structure of resonances that may overlap strongly, and (b) unstable against emission of other particles in addition to the transferred particle $n$ . We assume that the reaction is strongly peripheral and goes through the $n + A$ channel of $B$ via the $np$ interaction. We discuss the cross section for an experiment in which only particle $p$ is detected, while the decay products of $B$ are not observed or identified. For an isobaric-analog resonance we find that the cross section is proportional to $Γ_{n} cos 2 (δ_{N} + φ)$ , where $Γ_{n}$ is the $n$ escape width, $δ_{N}$ is the nuclear background phase shift, and $φ$ is the asymmetry phase. The cross section is entirely determined by the gross-structure parameters of the resonance, and does not depend on the nature of the fine structure. For the reaction ${}^{92}{Mo} (d, n)$ to $d_{\frac{5}{2}}$ (8.40-MeV), $s_{\frac{1}{2}}$ (9.33-MeV), and $d_{\frac{3}{2}}$ (9.91-MeV) analog states, we find that the effect of $δ_{N} + φ$ is negligible.

Cross Sections and Recoil Properties of Xenon Isotopes Formed in 11.5-GeV Proton Bombardment of ${}^{238}U$

Y. W. Yu, N. T. Porile, R. Warasila, and O. A. Schaeffer

Phys. Rev. C 8, 1091 (1973) - Published 1 September, 1973

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Partial cumulative yields and thick-target recoil properties of 14 xenon nuclides formed in the interaction of ${}^{238}U$ with 11.5-GeV protons and ranging from ${}^{122}{Xe}$ to ${}^{136}{Xe}$ have been measured. Independent yields and recoil ranges were deduced with the aid of reported data. The isotopic-yield distribution consists of two peaks with a broad region of near-constant yields between them. The recoil ranges exhibit the characteristic dropoff on the near neutron-deficient side of stability. Comparisons with other isotopic- and isobaric-yield distributions and ranges of products in the same mass region are presented.

[NUCLEAR REACTIONS ${}^{238}U$ ( $p$ , fission and spallation) ${}^{122}{Xe}$ - ${}^{136}{Xe}$ , $E_{p} = 11.5$ GeV; measured $σ$ and recoil properties.]

Study of Low-Lying $1^{-}$ States in ${}^{166, 168, 170}{Er}$ Using the Resonant Scattering of Bremsstrahlung

F. R. Metzger and V. K. Rasmussen

Phys. Rev. C 8, 1099 (1973) - Published 1 September, 1973

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In addition to the previously known $1^{-}$ states of ${}^{166}{Er}$ at 1663 and 1830 keV, levels at 1812 ± 1 keV ( ${}^{166}{Er}$ ), 1786 ± 1 keV ( ${}^{168}{Er}$ ), and 1824 ± 1 keV ( ${}^{170}{Er}$ ) have been excited using electron bremsstrahlung. Based on the observed angular distributions of the scattered photons, all three previously unknown levels were found to have spin 1. Linear polarization measurements using a two-slab Ge(Li) polarimeter led to negative parity assignments for the 1786- and 1824-keV levels but were inconclusive with respect to the less strongly excited 1812-keV level. Below 1.9 MeV, the 1663-, 1786-, and 1824-keV levels are the dominant $E 1$ excitations in their respective isotopes, the partial widths of their ground-state transitions being $Γ_{0} = 32 \pm 5, 46 \pm 5, and 30 \pm 3$ meV. The $\frac{B (E 1; 1^{-} \to g . s .)}{B (E 1; 1^{-} \to 2_{1}^{+})}$ ratios of 0.52 ± 0.02, 0.51 ± 0.02, and 0.53 ± 0.02 differ considerably from the ratio 1.31 ± 0.11 for the 1812-keV level and the reported ratio 0.22 for the 1830-keV $1^{-}$ state and are very close to the Alaga value of 0.50 for $K = 0^{-}$ levels.

Fragment Kinetic Energy in ${}^{18}O$ -Induced Fission of ${}^{232}{Th}$ and ${}^{246}{Cm}$

Robert L. Ferguson, Franz Plasil, Hartwig Freiesleben, C. E. Bemis, Jr., and H. W. Schmitt

Phys. Rev. C 8, 1104 (1973) - Published 1 September, 1973

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On the basis of a static scission model, Schmitt and Mosel have predicted that fragment total kinetic energies $E_{K}$ are larger than those expected from Viola's fission systematics when $255 ≲ A ≲ 280$ . In a search for this effect, $E_{K}$ was measured in ${}^{18}O$ bombardments of ${}^{232}{Th}$ and ${}^{246}{Cm}$ . Correlated energies of fission-fragment pairs were measured with silicon surface-barrier detectors; fragment mass and total kinetic energy distributions were deduced. For 102.5-MeV ${}^{18}O$ ions, the average pre-neutron-emission fragment total kinetic energy < $E_{K}$ > was found to be 187 MeV for the ${}^{232}{Th}$ case and 198 MeV for the ${}^{246}{Cm}$ case. The corresponding Schmitt-Mosel predictions are 186 MeV for ${}^{232}{Th}$ and 258 MeV for ${}^{246}{Cm}$ ; Viola's predicted values are 185 MeV for ${}^{232}{Th}$ and 203 MeV for ${}^{246}{Cm}$ . It is probable that the predicted high $E_{K}$ value for ${}^{246}{Cm}$ was not observed because shell effects, which are responsible for the high predicted kinetic energies, have disappeared at the relatively high excitation energies encountered in this work.

Behavior of the Particles Transferred in the ${}^{16}O$ + ${}^{197}{Au}$ and ${}^{12}C$ + ${}^{197}{Au}$ Reactions

Y. Eyal, K. Beg, D. Logan, J. Miller, and A. Zebelman

Phys. Rev. C 8, 1109 (1973) - Published 1 September, 1973

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The reactions between ${}^{197}{Au}$ and 166-MeV ${}^{16}O$ , and 125-MeV ${}^{12}C$ have been investigated through the measurement of (1) energy and angular distributions of emitted light particles ranging from Li to N, (2) production cross sections of selected radioactive products ranging from ${}^{192}{Au}$ to ${}^{205}{Po}$ , and (3) recoil ranges of a few of these radioactive products. From the results, information can be obtained on the probability that the intermediate excited heavy nuclei produced by the transfer of energy and nucleons from the incident projectile to the heavy target deexcite in a manner consistent with statistical equilibration of the excitation energy. The course of the transfer reactions is qualitatively discussed in terms of the semiclassical deflection function for the reacting systems.

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Total Cross Section of Neutrons on Deuterium in the keV Region

Recoil in ( ${}^{16}O$ , ${}^{15}N$ ) Reactions on $2 s - 1 d$ - and $1 f - 2 p$ -Shell Nuclei

Solar Neutrinos from the ${}^{3}{He} (p, e^{+} ν) {}^{4}{He}$ Reaction

${}^{51}V ({}^{3}{He}, d) {}^{52}{Cr}$ Reaction and Shell-Model Calculations for ${}^{52}{Cr}$

${}^{2}H ({}^{2}H, d p) n$ Reaction

Threshold Photoneutron Cross Sections for ${}^{60}{Ni}$ and ${}^{56}{Fe}$

Decays of ${}^{26}{Na}$ and ${}^{27}{Na}$

Fragment-Mass and Kinetic-Energy Distributions from the Spontaneous Fission of ${}^{246}{Cm}$

Isospin Mixing from the Effective Nucleon Interaction

Decays of ${}^{72}{Kr}$ and ${}^{73}{Kr}$

$K = 0$ Rotational Bands in ${}^{174}{Yb}$

Complete Hydrogen and Helium Particle Spectra from 30- to 60-MeV Proton Bombardment of Nuclei with $A = 12 to 209$ and Comparison with the Intranuclear Cascade Model

Nuclear Scattering of Plane-Polarized Photons

Nuclear Magnetic Resonance on Oriented ${}^{101}{Rh}^{m}$

Relative Excitations of the ${}^{237}{Pu}$ Shape Isomers

Effect of Fine Structure on Nucleon Transfer to Analog States

Cross Sections and Recoil Properties of Xenon Isotopes Formed in 11.5-GeV Proton Bombardment of ${}^{238}U$

Study of Low-Lying $1^{-}$ States in ${}^{166, 168, 170}{Er}$ Using the Resonant Scattering of Bremsstrahlung

Fragment Kinetic Energy in ${}^{18}O$ -Induced Fission of ${}^{232}{Th}$ and ${}^{246}{Cm}$

Behavior of the Particles Transferred in the ${}^{16}O$ + ${}^{197}{Au}$ and ${}^{12}C$ + ${}^{197}{Au}$ Reactions

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