Recent Articles

Background phase shift in $R$ -matrix theory

S. K. Gupta

Phys. Rev. C 13, 1326 (1976) - Published 1 March, 1976

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It has been shown recently by Cugnon in his generalized version of the $R$ -matrix theory that the hard sphere phase shift used in the standard $R$ -matrix theory is arbitrary and can be replaced, in general, by any other phase shift. In the present paper similar results have been derived in a straightforward manner, within the framework of the standard $R$ -matrix theory, from the usual division of $R$ matrix into a background matrix $R_{0}$ plus a matrix $R^{'}$ containing pole terms and further constraining $R_{0}$ to be a diagonal matrix. Thus Cugnon's theory and the standard $R$ -matrix theory lead to algebraically equivalent results. An expression for the renormalization factor for the reduced width has also been given in terms of the new phase shift and the hard sphere phase shift.

NUCLEAR REACTIONS $R$ -matrix theory, arbitrary phase shift within standard formalism. Expression for reduced width.

RAPID COMMUNICATION

Spectroscopic utility of the two-proton pickup ( ${}^{6}{Li}$ , ${}^{8}B$ ) reaction

R. B. Weisenmiller, N. A. Jelley, K. H. Wilcox, G. J. Wozniak, and Joseph Cerny

Phys. Rev. C 13, 1330(R) (1976) - Published 1 March, 1976

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Data for the ( ${}^{6}{Li}$ , ${}^{8}B$ ) reaction on targets of ${}^{10}B$ , ${}^{12}C$ , ${}^{13}C$ , and ${}^{16}O$ at 80 and 93 MeV are presented. Spectroscopic selectivity is observed and evidence for the dominance of spatially symmetric transfer of the two protons is shown. On the $T_{z} = 0$ targets a close similarity is found to the analogous ( $p, t$ ) reaction, and the ${}^{13}C$ results indicate the location of low-lying $1 p$ -shell states in ${}^{11}{Be}$ .

NUCLEAR REACTIONS ${}^{10}B$ ( ${}^{6}{Li}$ , ${}^{8}B$ ), ${}^{12}C$ ( ${}^{6}{Li}$ , ${}^{8}B$ ), ${}^{13}C$ ( ${}^{6}{Li}$ , ${}^{8}B$ ), ${}^{16}O$ ( ${}^{6}{Li}$ , ${}^{8}B$ ), $E = 80, 93$ MeV; measured $σ (E_{f}, θ)$ ; energy levels ${}^{8}{Li}$ , ${}^{10}{Be}$ , ${}^{11}{Be}$ , ${}^{14}C$ ; assessed importance of spatially antisymmetric transfer; comparisons with two-neutron pickup reactions leading to analog states and with two-particle spectroscopic amplitudes; resolution 300 keV.

RAPID COMMUNICATION

Low-energy-pion elastic scattering from light nuclei

M. D. Cooper and R. A. Eisenstein

Phys. Rev. C 13, 1334(R) (1976) - Published 1 March, 1976

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Simple $π$ -nucleus optical potentials constructed from $π - N$ phase shifts yield poor fits to elastic scattering from He and C below 75 MeV. Forcing a fit gives potentials which are pion producing or in violation of unitarity. The forward position (∼65°) and breadth of the minimum are shown to be partially responsible. These features are also shown to require a much stronger $s$ -wave interaction with nuclei than that derived from $π - N$ scattering.

NUCLEAR REACTIONS Scattering theory for elastic pions, light nuclei, low energy. Model shortcomings related to features of data.

RAPID COMMUNICATION

Hypervirial theorems for the Dirac equation

J. L. Friar and J. W. Negele

Phys. Rev. C 13, 1338(R) (1976) - Published 1 March, 1976

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Magnetic moment by hyperfine interaction and the lifetime of the $1^{-}$ state in ${}^{22}{NA}$

F. Beck, Y. Dar, M. Forterre, and J. P. Vivien

Phys. Rev. C 13, 895 (1976) - Published 1 March, 1976

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The magnetic moment of the $1^{-}$ , 2210 keV state in ${}^{22}{Na}$ has been measured by a plunger technique utilizing hyperfine interactions. Fields originating from $2 s$ and $2 p$ electrons were included. By comparison with previous ${}^{16}O$ data, population probabilities of the $L$ subshells seem to be different from statistical. The adopted gyromagnetic factor is $| g | = 0.36 \pm 0.07$ , the error representing mostly possible systematic uncertainties involved in the specific atomic model used. As a byproduct, the lifetime of the $1^{-}$ , 2210 keV ${}^{22}{Na}$ level was remeasured, yielding $τ = 22.0 \pm 0.8$ ps.

NUCLEAR REACTIONS ${}^{19}F (α, n γ)$ , $E_{α} = 5.17$ MeV; measured $γ (θ, t)$ , Doppler shift. ${}^{22}{Na}$ , 2210 keV level deduced $T_{\frac{1}{2}}$ , $| g |$ .

Polarization transfer in $p - {}^{3}{He}$ elastic scattering

R. A. Hardekopf and D. D. Armstrong

Phys. Rev. C 13, 900 (1976) - Published 1 March, 1976

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Angular distributions of the polarization transfer coefficients $K_{x}^{x^{'}}$ , $K_{z}^{x^{'}}$ , and $K_{y}^{y^{'}}$ (Wolfenstein parameters $R$ , $A$ , and $D$ were measured at 16.2 MeV for ${}^{3}{He} (\vec{p}, \vec{p})$ elastic scattering. The angular range covered was 30° to 90° (lab) in 10° steps. The experiment used a polarized proton beam of 150 to 200 nA, a liquid-nitrogen cooled ${}^{3}{He}$ gas target, and a ${}^{4}{He}$ -filled proton polarimeter. The transfer coefficients are well described by an $R$ -matrix analysis of the $p - {}^{3}{He}$ system.

NUCLEAR REACTIONS ${}^{3}{He} (p, p)$ : $E = 16.2$ MeV, $θ = 30 - 90 °$ (10° steps); measured polarization transfer coefficients.

Finite-range coupled-channels Born approximation

P. Nagel and R. D. Koshel

Phys. Rev. C 13, 907 (1976) - Published 1 March, 1976

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The formalism for calculating finite-range coupled-channels Born approximation differential cross sections is developed using the plane wave expansion method. A discussion of the computer code OUKID which was developed using this formalism is presented. A test of the reliability of this code is also presented and the effect of multistep processes on an $α$ transfer reaction is shown.

NUCLEAR REACTIONS Finite-range coupled-channels Born-approximation formalism, $α$ transfer.

Resonance spectroscopy of ${}^{30}{Si}$ nucleus in the excitation energy range 14.27 to 15.02 MeV

L. V. Namjoshi, S. K. Gupta, M. K. Mehta, and S. S. Kerekatte

Phys. Rev. C 13, 915 (1976) - Published 1 March, 1976

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Absolute differential cross sections for the elastic scattering of $α$ particles from ${}^{26}{Mg}$ have been measured as a function of bombarding energy between 4.18 and 5.14 MeV at angles corresponding to the c.m. angles 90°, 125°, 141°, and 167°. The data have been analyzed using the multilevel multichannel expression of $R$ matrix theory modified to replace the background hard sphere phase shifts by complex optical model phase shifts. These phase shifts have been obtained by fitting the averaged cross section with the optical model. This modification has resulted in reasonably good fits to excitation functions both in magnitude and shape. Twelve levels in the compound nucleus ${}^{30}{Si}$ have been identified and their spins, parities, and widths have been determined. The possibility of the $0^{+}$ levels being fragmented components of a quartet parent state has been discussed.

NUCLEAR REACTIONS ${}^{26}{Mg} (α, α)$ $E = 4.18 - 5.14$ MeV; measured $σ (θ, E)$ , $θ_{c . m .} = 90 °, 125 °, 141 °, 167 °$ ; ${}^{30}{Si}$ levels, deduced $Γ_{α}$ , $γ_{α}^{2}$ , $J^{π}$ ; modified two channel-multilevel $R$ matrix analysis.

Giant resonance region of ${}^{15}N$ studied by polarized and unpolarized proton capture measurements

H. R. Weller, R. A. Blue, N. R. Roberson, D. G. Rickel, S. Maripuu, C. P. Cameron, R. D. Ledford, and D. R. Tilley

Phys. Rev. C 13, 922 (1976) - Published 1 March, 1976

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We have measured the cross sections and the analyzing powers for the ${}^{14}C (\vec{p}, γ) {}^{15}N$ reaction for proton energies from 4.0 to 16.2 MeV. The corresponding range in excitation energies, 13.94 to 25.33 MeV, covers the region of the giant dipole resonance in ${}^{15}N$ . The five-angle angular distributions measured with unpolarized and with polarized beams at eight energies over this region were analyzed to determine the magnitudes and relative phases of the transition matrix elements. The analysis included $E 1$ , $M 1$ , and $E 2$ transitions. The observed $E 1$ strength exhausts only about 6% of the classical dipole sum rule. The dominant $E 1$ strength is compared to a shell-model calculation which includes 3p-3h excitations. A fairly uniform distribution of $E 2$ strength is observed which exhausts about 7% of the total energy-weighted sum rule. Although large uncertainties on this result could allow the existence of a giant $E 2$ resonance, the most probable values indicate that no appreciable concentration of $E 2$ strength is observed.

NUCLEAR REACTIONS ${}^{14}C (\vec{p}, γ_{0})$ ; measured $σ (E)$ , $E = 4.0 - 16.2$ MeV; measured $σ (θ)$ and $A (θ)$ , $E = 4.8 - 13.6$ MeV. ${}^{15}N$ deduced $T$ -matrix amplitudes and phases. Compared $E 2$ strength to energy-weighted sum rule. Compared $E 1$ strength to shell-model calculation. Enriched targets.

Energy levels of ${}^{12}N$

C. F. Maguire, D. L. Hendrie, D. K. Scott, J. Mahoney, and F. Ajzenberg-Selove

Phys. Rev. C 13, 933 (1976) - Published 1 March, 1976

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A study of the excited states of ${}^{12}N$ has been made using the ${}^{12}C ({}^{3}{He}, t) {}^{12}N$ reaction at $E ({}^{3}{He}) = 49.3$ MeV and the Berkeley magnetic spectrometer. We confirm a state of $E_{x} = 2.415 \pm 0.020$ MeV, $Γ_{c . m .} = 45 \pm 15$ keV, and we report four new states ${}^{12}N$ *(6.10, 7.13, 9.42, 9.90) with $Γ_{c . m .} \sim 0.3, 0.5, \sim 0.2, and 0.1$ MeV. Comparison with earlier ${}^{3}{He}, n$ work reveals some inconsistencies, and comparison with the analog region in the mirror nucleus ${}^{12}B$ shows that the structure of ${}^{12}N$ remains poorly known. NUCLEAR REACTIONS ${}^{12}C ({}^{3}{He}, t)$ , $E = 49.3$ MeV; measured $σ (θ)$ . $Γ$ , ${}^{12}N$ , deduced levels.

Back-angle ${}^{3}{He}$ and $α$ -particle elastic scattering from ${}^{27}{Al}$

C. B. Fulmer, D. C. Hensley, J. C. Hafele, C. C. Foster, N. M. O'Fallon, W. W. Edison, and S. A. Gronemeyer

Phys. Rev. C 13, 937 (1976) - Published 1 March, 1976

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Back-angle elastic scattering measurements were performed for ${}^{3}{He}$ and $α$ particles on ${}^{27}{Al}$ targets. Data were obtained at 11 energies between 14 and 31 MeV for ${}^{3}{He}$ particles and at 15 energies between 13 and 40 MeV for $α$ particles. 180° elastic cross sections for $α$ particles are a factor of ∼100 larger than those for ${}^{3}{He}$ particles of the same energy. The $α$ -particle angular distributions all peak at 180°, whereas minima at 180° are observed in some of the ${}^{3}{He}$ angular distributions. A number of optical-model analyses were performed on the data, and the results of the analyses show a pronounced energy dependence of the absorption term of the potential for $α$ particles but not for ${}^{3}{He}$ particles.

NUCLEAR REACTIONS ${}^{27}{Al}$ ( ${}^{3}{He}$ , ${}^{3}{He}$ ), ${}^{27}{Al} (α, α)$ ; $E = 13 - 40$ MeV; measured absolute $σ (θ)$ , $θ \sim 180 °$ , optical-model analyses.

Model for scattering from the bound state of a two-body system

W. van Dijk and M. Razavy

Phys. Rev. C 13, 944 (1976) - Published 1 March, 1976

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An exactly solvable model for scattering of a particle from the bound state of a two-body sysem is studied. In this model the motion of all particles is confined to one dimension. It is also assumed that the interaction between the projectile and the target is nonlocal and separable, but the potential between the target particles is local. Depending on the form of the latter potential two cases are considered: (1) the target is the ground state of a system whose eigenvalues are discrete and eigenfunctions localized, and (2) the target has only one bound state. In both cases the problem can be solved with overlapping as well as nonoverlapping potentials. This model is used to test the accuracy of the fixed scatterer approximation. It turns out that in this approximation the two cases yield similar results.

NUCLEAR REACTIONS One-dimensional model. Separable forces. Fixed scatterer approximation.

Gamma-emitting states in ${}^{22}{Ne}$

C. Broude, W. G. Davies, J. S. Forster, and G. C. Ball

Phys. Rev. C 13, 953 (1976) - Published 1 March, 1976

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Thirty-seven $γ$ -emitting levels have been observed in ${}^{22}{Ne}$ up to an excitation energy of 11.48 MeV following the reaction ${}^{19}F (α, p γ) {}^{22}{Ne}$ at $E_{α} = 20.0$ MeV. The decay modes and particle- $γ$ correlations of 22 of these levels have been measured. Seven levels of spin 5 or greater have been observed above 8.7 MeV excitation. Extensive collective band structure consistent with the available experimental evidence is proposed.

NUCLEAR REACTIONS ${}^{19}F (α, p γ)$ , $E = 20.0$ MeV; measured $σ (E_{p}, E_{γ}, θ_{γ}, E_{p γ})$ . ${}^{22}{Ne}$ deduced levels, $γ$ -branching ratios, $J$ , $γ$ -mixing ratios. Natural target.

${}^{12}C (α, {}^{8}{Be}) {}^{8}{Be}$ reaction in the energy range $E_{α} = 17 - 33$ MeV

F. Brochard, P. Chevallier, D. Disdier, V. Rauch, G. Rudolf, and F. Scheibling

Phys. Rev. C 13, 967 (1976) - Published 1 March, 1976

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Excitation functions and angular distributions for the ${}^{12}C (α, {}^{8}{Be}) {}^{8}{Be}$ reaction were measured for $E_{α} = 17 - 33$ MeV. Only broad structures were observed, except for a narrow resonance at $E_{α} = 22.30$ MeV. Total and $L$ - partial cross sections are deduced from the angular distributions. Below $E_{α} = 20$ MeV no $J = 8$ resonance was found. For higher energies an $L = 8$ contribution appears, increases gradually, and becomes dominant at and above $E_{α} = 23$ MeV. A tentative interpretation of the behavior of ${}^{12}C (α, {}^{8}{Be}) {}^{8}{Be}$ partial cross sections is given in the framework of the Hauser-Feshbach formalism.

NUCLEAR REACTIONS ${}^{12}C (α, {}^{8}{Be})$ , $E = 17 - 33$ MeV, measured $σ (E_{α}; θ)$ . ${}^{16}O$ resonances. Natural targets.

Excitation functions of reactions induced by ${}^{1}H$ and ${}^{2}H$ ions on natural Mg, Al, and Si

R. L. Wilson, D. J. Frantsvog, A. R. Kunselman, C. Détraz, and C. S. Zaidins

Phys. Rev. C 13, 976 (1976) - Published 1 March, 1976

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Cross sections for various reactions induced by beams of ${}^{1}H$ and ${}^{2}H$ ions on targets of natural Mg, Al, and Si were determined from observations of the radioactive product $γ$ rays. ${}^{1}H$ energies between 14.5 and 27.0 MeV and ${}^{2}H$ energies between 8.7 and 18.0 MeV from the University of Colorado cyclotron were used.

NUCLEAR REACTIONS Observed nuclear $γ$ rays, obtained $σ (E_{{}^{1}H})$ , $σ (E_{{}^{2}H})$ on natural targets Mg, Al, and Si; $E_{{}^{1}H} = 14.5 - 27.0$ MeV, $E_{{}^{2}H} = 8.7 - 18.0$ MeV.

Electromagnetic properties of the 6621- and 7950-keV levels in ${}^{32}S$

J. Vernotte, J. M. Maison, A. Chevallier, A. Huck, C. Miehe, and G. Walter

Phys. Rev. C 13, 984 (1976) - Published 1 March, 1976

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Lifetime and $γ$ -ray angular distribution measurements have been carried out at the 1247-, 1399-, 1402-, 1437-, and 1581-keV resonances of the ${}^{31}P (p, γ) {}^{32}S$ reaction. Mean lifetime values have been measured for the 5006-, 5413-, 6224-, 6621-, and 7950-keV levels. The $J^{π}$ value of the 7950-keV level has been determined as $J^{π} = 4^{-}$ . The strengths of some isoscalar $M 2$ transitions were measured. Electromagnetic features of the 6621-keV level are discussed in the framework of the vibrational model.

NUCLEAR REACTIONS ${}^{31}P (p, γ)$ , $E = 1.25 - 1.58$ MeV; measured $I_{γ} (θ)$ , Doppler-shift attenuation. ${}^{32}S$ deduced levels, $γ$ branching, mixing ratios, $J$ , $π$ , $τ_{m}$ .

Giant resonances observed in the scattering of 96- and 115-MeV alpha particles

D. H. Youngblood, J. M. Moss, C. M. Rozsa, J. D. Bronson, A. D. Bacher, and D. R. Brown

Phys. Rev. C 13, 994 (1976) - Published 1 March, 1976

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Beams of 96- and 115-MeV $α$ particles were used to study the giant resonance region in 27 nuclei ranging from ${}^{14}N$ to ${}^{208}{Pb .}$ A prominent broad ( $Γ = 3 - 7$ MeV) peak is present in the spectra at an excitation energy of $\sim \frac{63}{A^{\frac{1}{3}}}$ MeV for all nuclei studied with $A \geq 36$ . No such prominent peak is apparent for $A < 32$ . The angular distributions of the peak are characterized by an oscillatory behavior which is quite different from the monotonic behavior of the background. Distorted wave calculations with $L = 2$ reproduce the experimental angular distributions quite well for most of the nuclei. Energy weighted-sum rule fractions range from 30-50% for the lighter targets to near 100% for the heavier targets. Distorted wave calculations with a breathing mode ( $L = 0$ ) form factor fail to reproduce the observed resonance strength by about a factor of 3 for all targets. The width of the peak is smallest for the closed shell nuclei ${}^{40}{Ca}$ , ${}^{90}{Zr}$ , ${}^{144}{Sm}$ , and ${}^{208}{Pb}$ . A small but significant broadening is observed in the rare-earth region of deformed nuclei. The giant dipole resonance is not appreciably excited for any of the targets.

NUCLEAR REACTIONS ${}^{14}N$ , ${}^{16}O$ , ${}^{20}{Ne}$ , ${}^{27}{Al}$ , ${}^{28}{Si}$ , ${}^{32}S$ , ${}^{36}{Ar}$ , ${}^{40}{Ar}$ , ${}^{40}{Ca}$ , ${}^{48}{Ti}$ , ${}^{56}{Fe}$ , ${}^{58}{Ni}$ , ${}^{59}{Co}$ , ${}^{60}{Ni}$ , ${}^{66}{Zn}$ , ${}^{90}{Zr}$ , ${}^{94, 96, 100}{Mo}$ , ${}^{141}\Pr$ , ${}^{142}{Nd}$ , ${}^{144, 148, 154}{Sm}$ , ${}^{159}{Tb}$ , ${}^{174}{Yb}$ , ${}^{208}{Pb} (α, α^{'})$ , $E_{α} = 96, 115$ MeV. Measured $E_{x}$ , $σ (θ)$ giant resonances. Deduced $L$ , $β$ .

Total reaction cross section for protons on ${}^{3}{He}$ and ${}^{4}{He}$ between 18 and 48 MeV

A. M. Sourkes, A. Houdayer, W. T. H. van Oers, R. F. Carlson, and Ronald E. Brown

Phys. Rev. C 13, 451 (1976) - Published 1 February, 1976

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An attenuation technique has been used to measure the total reaction cross section $σ_{R}$ for the systems $p + {}^{3}{He}$ and $p + {}^{4}{He}$ at 10 and 16 incident proton energies, respectively, between 18 and 48 MeV. The attenuations were measured to about 2% and the elastic corrections are known to about 2%. This results in the $σ_{R}$ values being determined to about 8%, with smaller errors than this at the high energies and larger errors than this at the low energies. The data are compared with results from elastic scattering analyses using phase shifts, the optical model, and the resonating-group method.

NUCLEAR REACTIONS $p + {}^{3, 4}{He}$ , $E_{p} = 18 - 48$ MeV; measured $σ_{R}$ ; anticoincidence beam-attenuation technique.

${}^{37}{Cl} ({}^{3}{He}, α γ) {}^{36}{Cl}$ reaction: $γ$ decay of the two lowest lying $T = 2$ states

J. Vernotte, S. Fortier, M. Langevin, J. M. Maison, M. Vergnes, and B. H. Wildenthal

Phys. Rev. C 13, 461 (1976) - Published 1 February, 1976

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The ${}^{37}{Cl} ({}^{3}{He}, α γ) {}^{36}{Cl}$ reaction was studied at 18 MeV, using an enriched Ca ${Cl}_{2}$ target. The $γ$ rays coincident with the $α$ particles emitted at forward angle were detected by two Ge(Li) detectors located at $θ = 90 ° and 125 °$ Forty-two levels were observed in ${}^{36}{Cl}$ , essentially those seen in the ( $p, d$ ) reaction. The $γ$ -decay schemes of the two lowest lying $T = 2$ levels of ${}^{36}{Cl}$ (analogs of the first two levels of ${}^{36}S$ , $J^{π} = 0^{+} and 2^{+}$ , respectively) have been determined. The lowest $T = 2$ level at $E_{x} = 4299.5 \pm 1.1$ keV, feeds three levels: $E_{x} = 1165$ keV ( $J^{π} = 1^{+}, 65 \pm 8 %$ ), $E_{x} = 1601$ keV ( $J^{π} = 1^{+}, 28 \pm 5 %$ ), and $E_{x} = 2677$ keV ( $J^{π} = 1^{+}, 7 \pm 3 %$ ). The second one at $E_{x} = 7564 \pm 4$ keV feeds the levels at $E_{x} = 1601$ keV (42±6%), $E_{x} = 1960$ keV ( $J^{π} = 2^{+}, 40 \pm 6 %$ ), and $E_{x} = 2491$ keV ( $J^{π} = 2^{+}, 18 \pm 4 %$ ). These decay schemes are compared with shell model predictions. Some other levels of ${}^{36}{Cl}$ are also discussed.

NUCLEAR REACTIONS ${}^{37}{Cl} ({}^{3}{He}, α γ)$ , $E = 18$ MeV; measured $σ (θ = 0 °)$ ; $γ$ -decay schemes of the two first $T = 2$ ${}^{36}{Cl}$ states deduced; Ge(Li) detectors; enriched target.

Application of some general resonance relations to excitation function data

M. Soga and E. M. Bernstein

Phys. Rev. C 13, 473 (1976) - Published 1 February, 1976

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The usefulness of analyzing resonance excitation function data with a general relation is discussed and demonstrated. Inelastic scattering data over the 9.14 MeV anomaly in ${}^{12}{C +}$ proton is consistent with a doublet with equal or nearly equal resonance energies for the two levels. A relation describing the energy dependence of experimental quantities which involve the ratio of resonating cross sections is derived and applied to the case of spin-flip probabilities in inelastic scattering.

NUCLEAR REACTIONS ${}^{12}C (p, p^{'})$ , $E = 8 - 8.3, 8.9 - 9.4$ ; measured $σ (Ep)$ and spin-flip probability; applied general resonance theory.

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Background phase shift in $R$ -matrix theory

Spectroscopic utility of the two-proton pickup ( ${}^{6}{Li}$ , ${}^{8}B$ ) reaction

Low-energy-pion elastic scattering from light nuclei

Hypervirial theorems for the Dirac equation

Magnetic moment by hyperfine interaction and the lifetime of the $1^{-}$ state in ${}^{22}{NA}$

Polarization transfer in $p - {}^{3}{He}$ elastic scattering

Finite-range coupled-channels Born approximation

Resonance spectroscopy of ${}^{30}{Si}$ nucleus in the excitation energy range 14.27 to 15.02 MeV

Giant resonance region of ${}^{15}N$ studied by polarized and unpolarized proton capture measurements

Energy levels of ${}^{12}N$

Back-angle ${}^{3}{He}$ and $α$ -particle elastic scattering from ${}^{27}{Al}$

Model for scattering from the bound state of a two-body system

Gamma-emitting states in ${}^{22}{Ne}$

${}^{12}C (α, {}^{8}{Be}) {}^{8}{Be}$ reaction in the energy range $E_{α} = 17 - 33$ MeV

Excitation functions of reactions induced by ${}^{1}H$ and ${}^{2}H$ ions on natural Mg, Al, and Si

Electromagnetic properties of the 6621- and 7950-keV levels in ${}^{32}S$

Giant resonances observed in the scattering of 96- and 115-MeV alpha particles

Total reaction cross section for protons on ${}^{3}{He}$ and ${}^{4}{He}$ between 18 and 48 MeV

${}^{37}{Cl} ({}^{3}{He}, α γ) {}^{36}{Cl}$ reaction: $γ$ decay of the two lowest lying $T = 2$ states

Application of some general resonance relations to excitation function data

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