Recent Articles

Reaction Cross Sections for ${}^{16}O$ with Fe, Ni, Ge, and Zr

A. W. Obst, D. L. McShan, M. B. Greenfield, R. Holub, and R. H. Davis

Phys. Rev. C 8, 1379 (1973) - Published 1 October, 1973

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Relative excitation functions for the total neutron production and total charged-particle (proton, $α$ ) production above 2 MeV from ${}^{16}O$ bombardment of natural targets of Fe, Ni, Ge, and Zr have been measured at $θ_{lab} = 90^{\circ}$ and in the bombarding energy range from 30 to 60 MeV. For the most part, the onset of reaction product yields agrees well with the barrier heights as determined from ${}^{16}O$ elastic scattering. Absolute measurements for light charged-particle production were also made on Fe and Ni at $θ_{lab} = 60^{\circ}$ and in the bombarding energy range from 37 to 60 MeV. Combined with an average number of emitted charged particles calculated from Weisskopf-Ewing evaporation theory and with the effects of angular momentum included, the results when compared to optical-model reaction cross sections suggest a moment of inertia of one half the rigid-body value.

Lifetimes of the Lowest ${\frac{5}{2}}^{+}$ and ${\frac{9}{2}}^{+}$ States of the Mirror Pair ${}^{23}{Na}$ - ${}^{23}{Mg}$

E. K. Warburton, J. J. Kolata, and J. W. Olness

Phys. Rev. C 8, 1385 (1973) - Published 1 October, 1973

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The lifetimes of the ${\frac{5}{2}}^{+}$ and ${\frac{9}{2}}^{+}$ members of the $K^{π} = {\frac{3}{2}}^{+}$ ground-state rotational band in the mirror pair ${}^{23}{Na}$ - ${}^{23}{Mg}$ have been measured via the Doppler-shift attenuation method. The reactions ${}^{12}C + {}^{12}C = {}^{23}{Na} + p$ or ${}^{23}{Mg} + n$ were used and line shapes of the decay $γ$ rays were observed in singles for recoil into Al and Ni backings. The results are 1.63±0.20 and 2.00±0.24 psec for the ${}^{23}{Na}$ and ${}^{23}{Mg}$ ${\frac{5}{2}}^{+}$ first excited states and 0.11±0.02 and 0.08±0.02 psec for the ${}^{23}{Na}$ and ${}^{23}{Mg}$ ${\frac{9}{2}}^{+}$ states. These results are compared to the predictions of the Nilsson model. The separation of the isoscalar and isotensor components of the $M$ 1 rates is discussed as well as the separation of the spin and orbital contributions to the isotensor component. Incidental to this work, the energies of the first excited states were determined as 439.80 ± 0.15 keV ( ${}^{23}{Na}$ ) and 450.70±0.15 keV ( ${}^{23}{Mg}$ ), and the ${\frac{9}{2}}^{+} \to {\frac{7}{2}}^{+}$ transition energies were measured with comparable accuracy.

Collective Potential-Energy Surfaces and Collective Behavior of ${}^{46, 48, 50}{Ti}$

H. Rebel and D. Habs

Phys. Rev. C 8, 1391 (1973) - Published 1 October, 1973

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On the basis of the generalized collective model of Greiner and Gneuss the collective potential-energy surfaces of ${}^{46, 48, 50}{Ti}$ are determined by fitting level schemes and $B (E 2; 0^{+} \to 2^{+})$ values. Though sucessful for ${}^{46, 48}{Ti}$ , the model which is restricted to quadrupole deformations is not able to reproduce the relatively low $\frac{E_{4_{1}^{+}}}{E_{2_{1}^{+}}}$ ratio of 1.72 for ${}^{50}{Ti}$ .

Nuclear Spectroscopy of ${}^{62}{Cu}$ with ${}^{63}{Cu} (d, t)$ and ${}^{64}{Zn} (d, α)$ Reactions

W. W. Daehnick, Y. S. Park, and D. L. Dittmer

Phys. Rev. C 8, 1394 (1973) - Published 1 October, 1973

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The level structure of ${}^{62}{Cu}$ was studied by the reaction ${}^{63}{Cu} (d, t) {}^{62}{Cu}$ (at $E_{d} = 16 and 12$ MeV), by ${}^{63}{Cu} ({}^{3}{He}, α) {}^{62}{Cu}$ and ${}^{62}{Ni} ({}^{3}{He}, t) {}^{62}{Cu}$ (at $E_{{}^{3}{He}} = 18$ MeV), and by ${}^{64}{Zn} (d, α) {}^{62}{Cu}$ (at $E_{d} = 12.08$ MeV). Experimental resolution varied between 7-9 keV (for $d, t$ ) and 12-15 keV (for experiments involving charge-two projectiles). Angular distributions were obtained for the ( $d, t$ ) and ( $d, α$ ) reactions for the $15^{\circ} \geq θ_{L} \geq 45^{\circ}$ and $12^{\circ} \geq θ_{L} \geq 90^{\circ}$ , respectively, and spectroscopic factors and $L$ transfers were extracted by distorted-wave Born-approximation (DWBA) analyses for about 60 states below 3 MeV excitation. About half of these levels had not been studied previously. In spite of the relatively low deuteron energy most ( $d, α$ ) angular distributions showed systematic direct-reaction structure and were well fitted by DWBA calculations without variable parameters. A number of unique $J^{π} = 1^{+}$ and $J^{π} = 3^{+}$ assignments could be made. Narrow $J^{π}$ limits are given for most other levels. No states with $J > 5$ were identified in the energy region investigated.

[NUCLEAR REACTIONS ${}^{63}{Cu} (d, t)$ , $E = 12.00, 16.00$ MeV, measured $σ (E_{t}, θ)$ , ${}^{62}{Cu}$ level energies, resolution 8-keV DWBA analysis, deduced $l, S$ . ${}^{64}{Zn} (d, α)$ , $E = 12.08$ MeV measured $σ (E_{α}, θ)$ , resolution 12 keV. DWBA analysis, deduced $L$ transfers. ${}^{63}{Cu} ({}^{3}{He}, α)$ , $E = 18.0$ MeV, measured $σ (E_{α})$ , ${}^{62}{Cu}$ level energies, resolution 15 keV. ${}^{62}{Ni} ({}^{3}{He}, t)$ , $E = 18$ MeV, measured $σ (E_{t})$ , ${}^{62}{Cu}$ level energies, resolution 15 keV.]

Transition Rates in ${}^{44}{Ca}$

J. D. McCullen and D. J. Donahue

Phys. Rev. C 8, 1406 (1973) - Published 1 October, 1973

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The mean lives of states in ${}^{44}{Ca}$ up to an excitation energy of 3360 keV have been measured by the Doppler-shift attenuation method, using both solid and gas backings to slow the recoiling nuclei. Most of the states have lifetimes in the range of a few picoseconds, a "time region" at the limit of sensitivity of either method alone. The combination of the two methods gives accurate upper and lower limits, and a value for the mean life. The resulting experimental transition probabilities are compared to a calculation which assumes the existence of a core-excited rotational band in ${}^{44}{Ca}$ identical to that found to be necessary in ${}^{42}{Ca}$ . A general agreement is obtained. A value has also been measured for the mean life of the 2750-keV 4 ${}^{+}{state}$ in ${}^{42}{Ca}$ .

Spectroscopy of ${}^{67}{Zn}$ via Analog Resonances in ${}^{67}{Ga}$

J. W. D. Sinclair, N. L. Gearhart, H. J. Hausman, J. F. Morgan, G. A. Norton, and W. S. Steiner

Phys. Rev. C 8, 1413 (1973) - Published 1 October, 1973

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The spins of the analog resonances of some low-lying states of ${}^{67}{Zn}$ have been deduced from the ${}^{66}{Zn} (p, p^{'} γ) {}^{66}{Zn}$ (1.04-MeV) reaction in the triple-angular-correlation geometry of Goldfarb and Seyler. Excitation of the elastic and inelastic protons ( $0^{+}$ , ground state; $2^{+}$ , 1.04 and 1.87 MeV) have been measured at 90 and 130°. The following spin and parity assignments have been made for some of the parent states in ${}^{67}{Zn}$ : 0.390 MeV, ${\frac{3}{2}}^{-}$ ; 0.978 MeV, ${\frac{5}{2}}^{+}$ ; 2.273 MeV, ${\frac{5}{2}}^{+}$ ; 2.407 MeV, ${\frac{5}{2}}^{+}$ ; and 2.797 MeV, ${\frac{5}{2}}^{+}$ . Four other resonances for which definitive spin assignments could not be made were also studied.

[NUCLEAR REACTIONS ${}^{66}{Zn} (p, p)$ , ${}^{66}{Zn} (p, p_{1})$ , ${}^{66}{Zn} (p, p_{2})$ , measured $σ (E)$ , $E = 3.0 - 5.8$ MeV. Deduced $l$ of IAS in ${}^{67}{Ga}$ . Measured $J$ of IAS in ${}^{67}{Ga}$ using ${}^{66}{Zn} (p, p_{1} γ)$ angular correlations. Enriched target.]

Photon Scattering Cross Sections of ${}^{88}{Sr}$ in the Energy Region 8.6 to 12 MeV

S. Datta and J. S. Allen

Phys. Rev. C 8, 1421 (1973) - Published 1 October, 1973

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Monoenergetic $γ$ rays from the University of Illinois bremsstrahlung monochromator have been used to measure the cross sections for both elastic scattering from ${}^{88}{Sr}$ and inelastic scattering to the first excited state of ${}^{88}{Sr}$ . The incident $γ$ rays were selected in energy bins of about 100 keV in the energy region between 8.6 and 12 MeV. There are several maxima and minima in the cross sections similar to those observed in similar experiments with ${}^{90}{Zr}$ . The most prominent maximum in the elastic scattering occurs at about 9.5 MeV. This roughly coincides with the excitation energy of the most prominent $E 1$ state predicted by Goulard, Hughes, and Fallieros.

Study of the ${}^{96}{Mo} ({}^{3}{He}, d) {}^{97}{Tc}$ Reaction

L. R. Medsker, T. H. Braid, and J. L. Yntema

Phys. Rev. C 8, 1425 (1973) - Published 1 October, 1973

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The ${}^{96}{Mo} ({}^{3}{He}, d) {}^{97}{Tc}$ reaction has been restudied with 35.4-MeV ${}^{3}{He}$ particles from the Argonne cyclotron. Experimental angular distributions are compared with distorted-wave Born-approximation calculations to determine $l_{p}$ values and spectroscopic factors. Several previously observed doublets were resolved and proposed spin assignments were confirmed by comparing the present results with those of other measurements.

High Precision Studies on the Level Scheme of ${}^{80}{Se}$ by the Resonant-Scattering Method

H. Szichman

Phys. Rev. C 8, 1429 (1973) - Published 1 October, 1973

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The energies and reduced strengths of the $γ$ rays following deexcitation of the 7818.9-keV highly excited level in ${}^{80}{Se}$ reached by the ( $γ, γ^{'}$ ) reaction, were measured using a nickel capture $γ$ source. The level scheme deduced for this nucleus is presented. Measurements of the angular distributions of the scattered radiation permitted the assignment of spin values for most of the low-lying levels in this nucleus. Parity determinations were made comparing the reduced strengths with the statistics of known $E 1$ and $M 1$ transitions.

Ground-State Correlations for $N \neq Z$ Nuclei

Jyoti K. Parikh

Phys. Rev. C 8, 1433 (1973) - Published 1 October, 1973

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The method of calculating ground-state correlations in the random-phase approximation (RPA) has been extended for $N \neq Z$ nuclei. The expressions for the single-particle densities and RPA equations are derived. An application of this method could be made in explaining the anomalous isotope shift in the charge radii of ${}^{40}{Ca}$ - ${}^{48}{Ca}$ .

Study of ${}^{82}{Sr}$ , ${}^{84}{Sr}$ , and ${}^{86}{Sr}$ with the ( $p, t$ ) Reaction

J. B. Ball, J. J. Pinajian, J. S. Larsen, and A. C. Rester

Phys. Rev. C 8, 1438 (1973) - Published 1 October, 1973

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The ( $p, t$ ) reaction has been studied on the even stable isotopes of strontium at a proton energy of 31 MeV. Triton spectra were obtained with a magnetic spectrograph which yielded an over-all experimental resolution of 18 keV. The experimental angular distributions are compared with two-nucleon-transfer distorted-wave Born-approximation calculations to make spin-parity assignments for the observed levels and to extract enhancement factors. Energy level and transition intensity systematics are presented for the low-lying levels of these isotopes with particular emphasis on the $L = 0$ transitions. A number of new spin-parity assignments are made for ${}^{86}{Sr}$ and ${}^{84}{Sr}$ and the previously unreported level structure of ${}^{82}{Sr}$ is presented. The ground-state mass of ${}^{82}{Sr}$ is also determined from the measured $Q$ values.

Studies of the Recoil Properties of Products of the Interaction of ${}^{238}U$ with 11.5-GeV Protons

Patricia M. Starzyk and Nathan Sugarman

Phys. Rev. C 8, 1448 (1973) - Published 1 October, 1973

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The thick-target thick-catcher recoil properties of 23 rare-earth nuclides, produced in the interaction of 11.5-GeV protons with uranium, were measured in the mass range 135 to 165. The ratio of the range of a product from multi-GeV protons to that from 450-MeV protons, called the "relative range", was calculated for all nuclides studied in the mass region 82-165. For neutron-excess products, the relative range was around 0.95 and dropped sharply over two $Z$ units to 0.48 for very neutron-deficient products. This relative range behavior was used to analyze isobaric charge dispersion curves into three individual charge dispersion curves corresponding to two fission mechanisms (a low-excitation energy process, fission I, and a high-excitation energy process, fission II) and a nonfission (spallation) mechanism. The fractional isobaric cross section for the spallation process decreases with decreasing mass number from 0.98 at mass 170 to about 0.14 at mass 111 and then increases with decreasing mass number to 0.49 at mass 74. The products are neutron deficient, of low range, and with forward-to-backward recoil ratios (F/B) close to unity. The range values increase almost linearly with $Δ A$ (mass difference from the target nucleus) from 2.2 ${m g / c m}^{2}$ U at $Δ A$ of 70 to 5.6 ${m g / c m}^{2}$ U at $Δ A$ of 160. The value of $v_{∥}$ , the velocity imparted to the target nucleus in the beam direction as a result of the intranuclear cascade, decreases from 0.04 ${(M e V / a m u)}^{1 / 2}$ at $Δ A$ of 70 to 0.01 ${(M e V / a m u)}^{1 / 2}$ at $Δ A$ of 100 and then increases to 0.02 ${(M e V / a m u)}^{1 / 2}$ at $Δ A$ of 160. The fractional isobaric cross section for the fission II process is roughly constant with a maximum value of 0.17 for mass number 131. The relative range values for these products are about 0.9 and the F/B values are also close to unity.

$E 2$ and $E 4$ Transition Moments and Equilibrium Deformations in the Actinide Nuclei

C. E. Bemis, Jr., F. K. McGowan, J. L. C. Ford, Jr., W. T. Milner, P. H. Stelson, and R. L. Robinson

Phys. Rev. C 8, 1466 (1973) - Published 1 October, 1973

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Precision Coulomb-excitation experiments using ${}^{4}{He}$ ions have been performed in the actinide region ( $230 \leq A \leq 248$ ) by the observation of elastic and inelastically scattered projectiles using a split-pole magnetic spectrometer equipped with a position-sensitive proportional detector. 12 even- $A$ targets from ${}^{230}{Th}$ to ${}^{248}{Cm}$ have been investigated and the reduced quadrupole matrix element, $〈 2 ∥ M (E 2) ∥ 0 〉$ , and the reduced hexadecapole matrix element, $〈 4 ∥ M (E 4) ∥ 0 〉$ , have been determined from the experimental excitation probabilities of the $0^{+}$ , $2^{+}$ , and $4^{+}$ states in the ground-state rotational bands. The values of $B (E 4, 0 \to 4)$ range from 167 single-particle units for ${}^{234}U$ to essentially zero single-particle units for ${}^{244, 246, 248}{Cm}$ . Model-dependent deformation parameters, $β_{20}$ and $β_{40}$ , are extracted from the measured $E 2$ and $E 4$ transition moments for distributions of nuclear charge represented by deformed Fermi distributions and by a deformed homogeneous distribution.

[NUCLEAR REACTIONS ${}^{230, 232}{Th}$ ( $α, α^{'}$ ), ${}^{236}U$ ( $α, α^{'}$ ), $E = 16 and 17$ MeV, ${}^{234}U$ ( $α, α^{'}$ ), $E = 16 - 19$ MeV, ${}^{238}U$ ( $α, α^{'}$ ), $E = 16 - 18$ MeV, ${}^{238, 240, 242, 244}{Pu}$ ( $α, α^{'}$ ), ${}^{244, 246, 248}{Cm}$ ( $α, α^{'}$ ), $E = 17$ MeV; measured $σ (E_{α^{'}}; θ = 150)$ ; deduced $B (E 2)$ , $B (E 4)$ . Enriched targets. Extracted model-dependent deformations, $β_{20}$ and $β_{40}$ .]

Realistic Partial State Densities for Proton-Neutron Configurations in Nuclei near Closed Shells

K. Albrecht and M. Blann

Phys. Rev. C 8, 1481 (1973) - Published 1 October, 1973

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Using Nilsson single-particle level schemes as input, we have calculated partial state densities for excited proton-neutron configurations with specified particle-hole numbers. The recursion relation method used is general and free of any mathematical approximations. Results are given for nuclides in the Sn region and for several Pb isotopes. The strong shell effects in these nuclei are clearly reflected in their state densities. The results are compared to densities obtained from the equidistant-spacing model. This model not only fails completely at low excitation energies as expected, but it also disagrees in several cases with the average behavior of the realistic densities at higher energies.

Mass and Nuclear Charge Distributions from the Spontaneous Fission of ${}^{254}{Fm}$

R. M. Harbour, K. W. MacMurdo, D. E. Troutner, and M. V. Hoehn

Phys. Rev. C 8, 1488 (1973) - Published 1 October, 1973

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The relative fission yields of 20 mass chains from ${}^{254}{Fm}$ spontaneous fission were measured by direct high-resolution $γ$ -ray spectroscopy of the gross fission products. Reflected yields were calculated based on a prompt-neutron fission yield of 3.94; the absolute yields were determined by requiring the sum of all yields to be 200%. A peak-to-valley ratio for the mass-yield curve of ≥18 was determined radiochemically by measuring the cumulative yields of ${}^{140}{Ba}$ and ${}^{127}{Sb}$ .

${}^{254}{Fm}$ was produced by irradiating ${}^{253}{Es}$ in a high-flux reactor and then chemically separating the 3.24-h ${}^{254}{Fm}$ from its 39.3-h ${}^{254}{Es}^{m}$ parent. An aluminum "catcher" foil was used to collect the ${}^{254}{Fm}$ fission products. Nuclear charge distribution studies included measurements of the independent yields of ${}^{140}{La}$ , ${}^{135}{Xe}$ , ${}^{134}I$ , and ${}^{132}I$ relative to their cumulative yields from direct $γ$ -ray-spectroscopy data.

$\frac{E 2}{M 1}$ Multipole Mixing Ratios of $γ$ Transitions in Even-Even Deformed Nuclei

K. S. Krane

Phys. Rev. C 8, 1494 (1973) - Published 1 October, 1973

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A summary is presented of the magnitudes and phases of previously measured $\frac{E 2}{M 1}$ multipole mixing ratios of $γ$ transitions deexciting levels of the $β$ - and $γ$ -vibrational bands to the ground-state band in even-even deformed nuclei. A uniform phase, with few exceptions, is characteristic of transitions depopulating the $γ$ band, while no systematic behavior is apparent for transitions from the $β$ band; the magnitudes, while uniformly large, show little apparent systematic behavior among the nuclei in this region. Although none of the previously proposed theoretical interpretations is sufficient to explain both the magnitudes and relative phases of these mixing ratios, a phenomenological interpretation in terms of $Δ K = 1$ band mixing through the intermediary of a $K = 1^{+}$ excitation is successful in predicting the relative magnitudes and phases in a number of cases.

Fission of U, Th, Bi, Pb, and Au Induced by 2.1-GeV ${}^{2}H$ Ions

F. Rahimi, D. Gheysari, G. Remy, J. Tripier, J. Ralarosy, R. Stein, and M. Debeauvais

Phys. Rev. C 8, 1500 (1973) - Published 1 October, 1973

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Cross sections of U, Th, Bi, Pb, and Au nuclei for binary and ternary fission induced by 2.1-GeV deuterons have been measured with plastic detectors. The binary-fission cross sections for uranium and lead have been found to be, respectively, 20 and 30% higher for deuterons than for protons, whereas for the ternary fission the increases are by factors of 2 and 3, respectively. The variation of the cross section as a function of the incident deuteron energy and the $\frac{Z^{2}}{A}$ parameter of the target has been investigated, and a relation between these two variables is proposed.

Neutron-Capture Cross Sections of the Stable Lead Isotopes

B. J. Allen, R. L. Macklin, R. R. Winters, and C. Y. Fu

Phys. Rev. C 8, 1504 (1973) - Published 1 October, 1973

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Neutron-capture yields for several samples of separated lead isotopes were obtained at the Oak Ridge electron linear accelerator, in the neutron energy range above 2.5 keV. These were analyzed for resonance-capture areas and parameters. The data are included in a new evaluation of lead cross-section data.

[NUCLEAR REACTIONS ${}^{204, 206, 207, 208}{Pb} (n, γ)$ , $E_{n} > 2.5$ keV, measured $σ_{n, γ}$ ; deduced levels, $E_{γ}$ , $Γ$ , $Γ_{γ}$ , averages, R.I., enriched targets, resolution ∼0.2%.]

Properties of the Odd-Mass Iodine Isotopes in a Particle-Phonon Coupling Scheme

R. Almar, O. Civitarese, and F. Krmpotić

Phys. Rev. C 8, 1518 (1973) - Published 1 October, 1973

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A qualitative description of the low-lying states of odd-mass iodine nuclei is proposed in terms of a three-proton cluster coupled to a harmonic-quadrupole vibrational field. Using reasonable values for the parameters involved, the calculated spectrum of ${}^{131}I$ is in good agreement with experimental data. The comparison with experiments is also satisfactory for the one-body stripping strengths, $B (E 2)$ transition probabilities, and magnetic-dipole and electric-quadrupole moments. We do not obtain good results concerning the energies of the lightest I isotopes.

Boson-Expansion Method and the Collective Negative-Parity States in Even-Even Spherical Nuclei

A. A. Rådutå, V. Ceausescu, G. Stratan, and A. Såndulescu

Phys. Rev. C 8, 1525 (1973) - Published 1 October, 1973

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Based on the conventional shell-model Hamiltonian with pairing, quadrupole, and octupole effective forces, the quadrupole-octupole collective anharmonicities are studied by the boson-expansion method. The Belyaev-Zelevinski expansion convergence is improved by supplementing it with a canonical transformation of the random-phase-approximation phonons, determined from the minimum condition for the ground-state energy. Calculations for the one level case show that the anharmonic terms corresponding to the new representation are much smaller than the harmonic-like terms. Explicit expressions for the first $2^{+}$ , $3^{-}$ , and quintuplet ( $1^{-}$ , $2^{-}$ , $3^{-'}$ , $4^{-}$ , $5^{-}$ ) energies and wave functions as well as for $B (E 2)$ ( $2^{+}$ → $0^{+}$ ) and $B (E 3)$ ( $3^{-}$ → $0^{+}$ and $3^{-'}$ → $0^{+}$ ) are derived by a perturbation treatment. The quintet ordering predicted by the previous calculation is reproduced by a rough estimation. Also, expressions for the static quadrupole moments of the first $2^{+}$ and $3^{-}$ states are given.

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Reaction Cross Sections for ${}^{16}O$ with Fe, Ni, Ge, and Zr

Lifetimes of the Lowest ${\frac{5}{2}}^{+}$ and ${\frac{9}{2}}^{+}$ States of the Mirror Pair ${}^{23}{Na}$ - ${}^{23}{Mg}$

Collective Potential-Energy Surfaces and Collective Behavior of ${}^{46, 48, 50}{Ti}$

Nuclear Spectroscopy of ${}^{62}{Cu}$ with ${}^{63}{Cu} (d, t)$ and ${}^{64}{Zn} (d, α)$ Reactions

Transition Rates in ${}^{44}{Ca}$

Spectroscopy of ${}^{67}{Zn}$ via Analog Resonances in ${}^{67}{Ga}$

Photon Scattering Cross Sections of ${}^{88}{Sr}$ in the Energy Region 8.6 to 12 MeV

Study of the ${}^{96}{Mo} ({}^{3}{He}, d) {}^{97}{Tc}$ Reaction

High Precision Studies on the Level Scheme of ${}^{80}{Se}$ by the Resonant-Scattering Method

Ground-State Correlations for $N \neq Z$ Nuclei

Study of ${}^{82}{Sr}$ , ${}^{84}{Sr}$ , and ${}^{86}{Sr}$ with the ( $p, t$ ) Reaction

Studies of the Recoil Properties of Products of the Interaction of ${}^{238}U$ with 11.5-GeV Protons

$E 2$ and $E 4$ Transition Moments and Equilibrium Deformations in the Actinide Nuclei

Realistic Partial State Densities for Proton-Neutron Configurations in Nuclei near Closed Shells

Mass and Nuclear Charge Distributions from the Spontaneous Fission of ${}^{254}{Fm}$

$\frac{E 2}{M 1}$ Multipole Mixing Ratios of $γ$ Transitions in Even-Even Deformed Nuclei

Fission of U, Th, Bi, Pb, and Au Induced by 2.1-GeV ${}^{2}H$ Ions

Neutron-Capture Cross Sections of the Stable Lead Isotopes

Properties of the Odd-Mass Iodine Isotopes in a Particle-Phonon Coupling Scheme

Boson-Expansion Method and the Collective Negative-Parity States in Even-Even Spherical Nuclei

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