Recent Articles

Absorptive breakup of ${}^{14}N$ projectiles

S. L. Tabor, L. C. Dennis, and K. Abdo

Phys. Rev. C 24, 2552 (1981) - Published 1 December, 1981

Show Abstract

The ${}^{14}N$ + ${}^{27}{Al}$ reaction of 62 MeV shows a surprisingly strong yield of breakup particles. These fragments, whose spectra peak at approximately the beam velocity, represent a total cross section of about 150 mb. A Serber-type projectile breakup model with no adjustable parameters reproduces the shapes of the experimental spectra and angular distributions reasonably well and indicates that the mechanism producing these fast particles involves the breakup of the projectile combined with the absorption of the remainder of the projectile by the target.

NUCLEAR REACTIONS ${}^{27}{Al}$ ( ${}^{14}N$ , $X$ ), $x = L i, B e, B, C$ ; $E = 62$ MeV; measured $\frac{d σ}{d Ω} (E, θ)$ .

( ${}^{6}{Li}$ , $d$ ) reaction on ${}^{16}O$ and ${}^{28}{Si}$ at 75 MeV

T. Tanabe, M. Yasue, K. Sato, K. Ogino, Y. Kadota, Y. Taniguchi, K. Obori, K. Makino, and M. Tochi

Phys. Rev. C 24, 2556 (1981) - Published 1 December, 1981

Show Abstract

The ${}^{16}O$ ( ${}^{6}{Li}$ , $d$ ) ${}^{20}{Ne}$ and ${}^{28}{Si}$ ( ${}^{6}{Li}$ , $d$ ) ${}^{32}S$ reactions have been studied at 75-MeV bombarding energy. The angular distributions have been analyzed with exact finite-range distorted-wave Born approximation calculations assuming a direct $α$ -cluster transfer. The calculations account for the shapes of the experimental angular distributions reasonably well. For the ${}^{16}O$ ( ${}^{6}{Li}$ , $d$ ) ${}^{20}{Ne}$ reaction, the extracted relative $α$ -particle spectroscopic factors for the ${}^{20}{Ne}$ ground state band are in good agreement with theoretical predictions, while those for the $O^{-}$ excited band are in disagreement with them. For the ${}^{28}{Si}$ ( ${}^{6}{Li}$ , $d$ ) ${}^{32}S$ reaction, spectroscopic factors are extracted for low-lying states of ${}^{32}S$ and compared with those from other $α$ -transfer reactions. Some strongly populated states have been observed at high excitation energies of ${}^{32}S$ .

NUCLEAR REACTIONS ${}^{16}O$ ( ${}^{6}{Li}$ , $d$ ) ${}^{20}{Ne}$ , ${}^{28}{Si}$ ( ${}^{6}{Li}$ , $d$ ) ${}^{32}S$ , $E = 75$ MeV, measured $σ (θ)$ , DWBA analysis spectroscopic factors.

Localized $l$ window from partial fusion reactions accompanied by proton, deuteron, and triton emission

H. Yamada, C. F. Maguire, J. H. Hamilton, A. V. Ramayya, D. C. Hensley, M. L. Halbert, R. L. Robinson, F. E. Bertrand, and R. Woodward

Phys. Rev. C 24, 2565 (1981) - Published 1 December, 1981

Show Abstract

A high and localized spin population associated with partial fusion reactions has been established through the measurement of $γ$ -ray multiplicity in coincidence with fast forward $p$ , $d$ , or $t$ produced by 167-MeV ${}^{14}N$ on ${}^{154}{Sm}$ . The average $γ$ multiplicities are constant ( $M_{γ} = 31$ ) for all the yrast transitions up to spin $26 ℏ$ in ${}^{158}{Er}$ , which implies that no spins up to $26 ℏ$ were populated initially. The deduced average angular momentum transferred is $63 ℏ$ , which is comparable to the critical angular momentum $l_{cr}$ predicted for the fusion of ${}^{13}C$ and ${}^{154}{Sm}$ . The mass distribution of the residual nuclei is appreciably narrower than that for compound nuclear reactions, and this gives another indication of the narrow $l$ window.

NUCLEAR REACTIONS Partial fusion ${}^{154}{Sm}$ [ ${}^{14}N$ , ( $p$ , $d$ , or $t$ ) $xn γ$ ] ${}^{156 - 160}{Er}$ ; $E ({}^{14}N) = 167$ MeV; measured $γ$ -ray multiplicity, mass distribution of residual nuclei; deduced localized $l$ window of entrance channel; discussed massive transfer model.

Positive pion production by 149-166 MeV protons on ${}^{16}O$ and ${}^{28}{Si}$

T. P. Sjoreen, P. H. Pile, R. D. Bent, M. C. Green, J. J. Kehayias, R. E. Pollock, F. Soga, M. C. Tsangarides, and J. G. Wills

Phys. Rev. C 24, 2569 (1981) - Published 1 December, 1981

Show Abstract

Angular distributions of the differential cross sections for the reactions ${}^{16}O$ ( $p$ , $π^{+}$ ) ${}^{17}O$ (g.s., 0.87 MeV) and ${}^{28}{Si}$ ( $p$ , $π^{+}$ ) ${}^{29}{Si}$ (g.s., 1.27, 2.03, 3.07, 3.62 MeV) have been measured at several bombarding energies corresponding to pion center-of-mass energies from 7.2 to 21 MeV. In addition, cross section upper limits were obtained at several angles for transitions to the 2.43 and 4.08 MeV states of ${}^{29}{Si}$ at $T_{p} = 149$ MeV. The systematics of the data are discussed and compared with distorted-wave Born approximation stripping model calculations.

NUCLEAR REACTIONS ${}^{16}O$ , ${}^{28}{Si}$ ( $p$ , $π^{+}$ ), $E_{p} = 149 - 166$ MeV; measured $\frac{d σ}{d Ω (θ)}$ , $θ = 25 - 155 °$ ; comparison with DWBA stripping model calculations.

Fusion behavior in time-dependent Hartree-Fock calculations of ${}^{86}{Kr}$ + ${}^{139}{La}$ and ${}^{84}{Kr}$ + ${}^{209}{Bi}$ collisions

K. T. R. Davies, K. R. Sandhya Devi, and M. R. Strayer

Phys. Rev. C 24, 2576 (1981) - Published 1 December, 1981

Show Abstract

Results are presented for time-dependent Hartree-Fock calculations of head-on collisions of ${}^{86}{Kr}$ + ${}^{139}{La}$ and ${}^{84}{Kr}$ + ${}^{209}{Bi}$ . The two-body effective interaction employed is the finite-range Skyrme II potential. For both systems fusion is observed in a broad energy region at moderately high energies above the Coulomb barrier and fusion-like events are also found for a smaller range of energies near the barrier. The ${}^{86}{Kr}$ + ${}^{139}{La}$ system exhibits resonance-like behavior in both energy regimes. From non-head-on collisions ( $L \neq 0$ ), an estimate is made of a lower limit for the fusion cross section of ${}^{84}{Kr}$ + ${}^{209}{Bi}$ → ${}^{293}119$ * at $E_{lab} = 875$ MeV. For both systems a fusion window exists beyond the maximum energy for which fusion is seen for $L = 0$ . The fusion behavior is found to be sensitive to the two-body effective interaction used. It is shown that, in numerical Peaceman-Rachford calculations, the occurrence of fusion and the amount of energy dissipation can depend upon the magnitude of the time step used.

NUCLEAR REACTIONS Head-on collisions of ${}^{86}{Kr}$ + ${}^{139}{La}$ and ${}^{84}{Kr}$ + ${}^{209}{Bi}$ in the time-dependent Hartree-Fock approximation. Fusion and strongly damped collisions.

Three-body calculations for reactions involving transfer of alpha cluster using the bound state approximation

V. S. Mathur and Rajendra Prasad

Phys. Rev. C 24, 2593 (1981) - Published 1 December, 1981

Show Abstract

The three-body equations of Alt, Grassberger, and Sandhas have been solved for a system of three particles, viz., $α$ , $d$ , and ${}^{40}{Ca}$ , to obtain the on-shell transition amplitudes of various rearrangement processes, using what is called the bound state approximation. The input in this calculation, viz., the two-body $t$ matrices, representing the interaction between the pairs of particles, is taken to be of a separable form conforming to the bound $S$ states of the pairs. The absolute values of the differential cross section of the ( ${}^{6}{Li}$ , $d$ ) reaction on ${}^{40}{Ca}$ , leading to the ground state of the ${}^{44}{Ti}$ , obtained from this calculation are compared with the experimental results of Fulbright et al. to assess how far the three-body calculations have a bearing on $α$ -transfer reactions.

NUCLEAR REACTIONS Bound state approximation, $α$ -transfer reaction, three-body calculation.

Mass distributions for monoenergetic-neutron-induced fission of ${}^{235}U$

L. E. Glendenin, J. E. Gindler, D. J. Henderson, and J. W. Meadows

Phys. Rev. C 24, 2600 (1981) - Published 1 December, 1981

Show Abstract

Fission product yields for 37 masses were determined for the fission of ${}^{235}U$ with essentially monoenergetic neutrons of 0.17, 0.55, 1.0, 2.0, 4.0, 5.5, 6.3, 7.1, and 8.1 MeV. Fission product activities were measured by Ge(Li) $γ$ -ray spectrometry of irradiated ${}^{235}U$ targets and by chemical separation of the fission product elements followed by $β$ counting and/or $γ$ -ray spectrometry. The mass-yield data show a sensitive increase of fission yields in the near symmetric mass region (valley) with increasing incident neutron energy $E_{n}$ (peak-to-valley ratio decreasing from 590 to 13) over the range of 0.17 to 8.1 MeV with only small changes in yields in other regions of the mass distribution. Curves of valley yields as a function of $E_{n}$ display a flat step in the region of second-chance fission (above ∼6 MeV) where the excitation energy is lowered by competition with neutron evaporation prior to fission. Comparison is made with monoenergetic-neutron-induced fission of ${}^{238}U$ .

NUCLEAR REACTIONS, FISSION ${}^{235}O$ ( $n$ , $f$ ), $E_{n} = 0.17, 0.55, 1.0, 2.0, 4.0, 5.5, 6.3, 7.1, and 8.1$ MeV; measured mass yields.

Nuclear level density and the mass distribution of fission fragments

M. Rajasekaran and V. Devanathan

Phys. Rev. C 24, 2606 (1981) - Published 1 December, 1981

Show Abstract

Using the single particle energy spectrum and Bethe's formula for nuclear level density, the mass distribution of fission fragments is calculated for nuclei ${}^{236}U$ , ${}^{258}{Fm}$ , and ${}^{240}{Pu}$ , and also for the compound systems ${}^{84}{Kr}$ + ${}^{238}U$ and ${}^{129}{Xe}$ + ${}^{197}{Au}$ at different excitation energies. The results are in reasonable agreement with experimental yield curves.

RADIOACTIVITY, FISSION Nuclear level density, mass and charge distribution of fission fragments.

$π NN$ , $π N Δ$ , and $π π ρ$ form factors from quasi-two-body hadronic reactions

C. A. Dominguez

Phys. Rev. C 24, 2611 (1981) - Published 1 December, 1981

Show Abstract

Differential cross sections for $pp \to n Δ^{+ +}$ , $pp \to p Δ^{+}$ , and $π^{+} p \to ρ^{0} Δ^{+ +}$ at high energies, $p_{L} \approx 3 - 16$ GeV/c, and small momentum transfers, $0 < | t | ≲ 0.3$ ${G e V / c}^{2}$ , have been analyzed using a Reggeized one pion exchange mechanism with form factors of the monopole and the dual model type. Results strongly confirm the dual model prediction that $F_{π NN} (t) = F_{π N Δ} (t) = F_{π π ρ} (t)$ when the pion is the only virtual (off the mass shell) particle in each vertex and the form factors are all normalized to unity at $t = {μ_{π}}^{2}$ . No evidence has been found for non-one-pion exchange contributions in the kinematic region under consideration thus leading to a model independent determination of the range and asymptotic rate parameters of the three-point functions. The results are $Λ_{π} \approx 800 - 1000$ MeV and $β_{π} \approx 2.5 - 3$ , in good agreement with earlier determinations from $NN$ charge exchange scattering and pion photoproduction.

NUCLEAR REACTIONS Quasi-two-body hadronic reactions at high energy; extraction of the $π NN$ and other hadronic form factors at small momentum transfers; one pion exchange potential.

Relativistically corrected impulse approximation in the presence of a local central potential

W -Y. P. Hwang

Phys. Rev. C 24, 2618 (1981) - Published 1 December, 1981

Show Abstract

An impulse approximation with relativistic corrections is derived to incorporate the fact that each constituent nucleon of the target nucleus is moving in an average local central potential generated by the other nucleons. The constraint imposed by current conservation is described. An application of the resultant impulse approximation to reanalyze symmetry tests in the $A = 12$ nuclei induces a few subtle changes but does not upset the standard interpretation of these experimental results.

NUCLEAR REACTIONS Impulse approximation with relativistic corrections, derived in the presence of a local central potential, constrained by current conservation; symmetry tests in the $A = 12$ nuclei.

Relativistic effects, the deuteron $D$ -state, and backward $p - d$ scattering

B. D. Keister

Phys. Rev. C 24, 2628 (1981) - Published 1 December, 1981

Show Abstract

The question of relativistic effects in backward-angle $p - d$ scattering is examined by evaluating the nucleon-exchange contribution to the elastic cross section and tensor polarization as a Feynman diagram. By means of a well-known approximation procedure, the invariant amplitudes in the $d - n - p$ vertex function are identified with nonrelativistic wave functions. Above 500 MeV proton energy, the calculated polarization agrees neither with earlier nonrelativistic calculations nor with experiment. Moreover, it is found that the aforementioned approximation procedure gives rise to large ambiguities in the tensor alignment, due to an intimate connection between nucleon negative-energy components and the deuteron $D$ state.

NUCLEAR REACTIONS Backward-angle $p - d$ elastic scattering and polarization. Relativistic and deuteron $D$ -state effects.

Pion-nucleon interaction in the $P_{11}$ partial wave and the pion-nucleon vertex function

T. Mizutani, C. Fayard, G. H. Lamot, and S. Nahabetian

Phys. Rev. C 24, 2633 (1981) - Published 1 December, 1981

Show Abstract

We have studied the pion-nucleon interaction in the $P_{11}$ channel considering its important role in the absorption and production of the pion by nuclei. Specifically, we emphasize that the total $P_{11}$ $t$ matrix (or amplitude) can be naturally decomposed into two parts: the direct (and dressed) pole part and the nonpole part. It is then easy to observe that individually these two parts can be large but tend nearly to cancel each other and produce small and negative phase shift values from threshold to $T_{lab}^{π} \sim 170$ MeV and that at higher energies the nonpole term dominates giving positive phase shift values. We then try to find the parametrization of this partial wave $t$ matrix within the framework of the Blankenbecler-Sugar reduction. As a by-product we have obtained the $π NN$ vertex function (with one nucleon off mass shell) and the dressed nucleon propagator.

NUCLEAR REACTIONS $π N$ $P_{11}$ channel, pole and nonpole decomposition of $P_{11}$ $t$ matrix, phase shift up to 300 MeV.

Distorted wave impulse approximation calculations of ( $π^{+}$ , $2 p$ ) reactions in a quasideuteron model

P. G. Roos, L. Rees, and N. S. Chant

Phys. Rev. C 24, 2647 (1981) - Published 1 December, 1981

Show Abstract

A formalism for distorted wave impulse approximation calculations of the $A (π^{+}, 2 p) B$ reaction to discrete states in nucleus $B$ is described. Assuming that the $π^{+}$ capture occurs on a deuteronlike structure in the target nucleus, calculations are presented covering a range of bombarding energies from 25 to 350 MeV and target nuclei from $A = 16 to 90$ . In most cases, distortion effects arising from the interaction of the pion and two outgoing protons with the core are large, but primarily affect the magnitude of the cross section. Based on these calculations it is concluded that any more realistic calculation of pion absorption will require the inclusion of the interaction of the incoming and outgoing particles with the core.

NUCLEAR REACTIONS DWIA reaction theory of pion absorption on nuclei. ${}^{16}O$ , ${}^{40}{Ca}$ , ${}^{90}{Zr}$ ( $π^{+}$ , $2 p$ ), $T_{π} = 25 - 350$ MeV, calculate $σ (θ_{1}, θ_{2}, E_{1})$ .

Parametrization of the elastic sector of the nucleon-nucleon scattering matrix. I.

Ronald Bryan

Phys. Rev. C 24, 2659 (1981) - Published 1 December, 1981

Show Abstract

We present a method for parametrizing the 2×2 $S$ matrix for coupled-channel nucleon-nucleon elastic scattering above the pion-production threshold, namely, we introduce two dummy nucleon-Roper-resonance channels and unitarize the consequent 4×4 $S$ matrix. The elastic nonunitary 2×2 nucleon-nucleon $S$ matrix is then recovered as a submatrix of the 4×4 matrix. We parametrize the unitary 4×4 $S$ matrix by generalizing the prescription of Stapp, Ypsilantis, and Metropolis for 2×2 matrices. The six phases parametrizing the 2×2 submatrix are well behaved as the interaction vanishes, and automatically satisfy a unitarity condition which we derive, viz., det $(1 - S_{a a}^{†} S_{aa}) \geq 0$ , where $S_{aa}$ is the 2×2 submatrix. Of the six phases, three represent the absorption and parametrize a real, symmetric 2×2 matrix $N$ , analogous to the absorption parameter $η$ in the uncoupled case. A method is given for recovering the phase parameters from the $S$ matrix or other parametrizations.

NUCLEAR REACTIONS Scattering theory. Parametrized coupled-channel nucleon-nucleon elastic scattering above the pion-production threshold.

Production of ${}^{38}{Ar}$ and ${}^{39}{Ar}$ in the interaction of gold and thorium with 1, 2.5, and 24 GeV protons

H. Sauvageon

Phys. Rev. C 24, 2667 (1981) - Published 1 December, 1981

Show Abstract

Cross sections and thick-target recoil properties of ${}^{38}{Ar}$ and ${}^{39}{Ar}$ , formed in the interaction of Au and Th with 1, 2.5, and 24 GeV protons, have been determined in order to study their variations with incident energy. The measurement of the experimental range, $2 W (F + B)$ , and of the forward-to-backward ratio $\frac{F}{B}$ permits (with the help of a mathematical formalism based on the two-step model) the determination of some characteristics of nuclear reactions; i.e., the mean kinetic energy of the observed products $〈 T 〉$ , the mean forward component of the velocity imparted to the struck nucleus in the first step, $〈 v_{∥} 〉$ , and the excitation energy $E^{*}$ of the residual nucleus after cascade. The results are discussed in terms of very asymmetric fission (at 1 GeV) and deep spallation (at 2.5 and 24 GeV) mechanisms. These results are very similar to those obtained for neutron-deficient krypton and xenon isotopes formed in thorium and presented in a previous publication from this laboratory.

NUCLEAR REACTIONS Measured $σ$ , $2 W (F + B)$ , and $\frac{F}{B}$ of ${}^{38}{Ar}$ and ${}^{39}{Ar}$ isotopes formed in interaction of Au and Th with 1, 2.5, and 24 GeV protons.

Quasifree scattering of positive pions on carbon

H. J. Ziock, R. J. Ellis, K. O. H. Ziock, J. Bolger, E. Boschitz, J. Arvieux, R. Corfu, and J. Piffaretti

Phys. Rev. C 24, 2674 (1981) - Published 1 December, 1981

Show Abstract

We have studied the reaction ${}^{12}C$ ( $π^{+}$ , $π^{+} p$ ) ${}^{11}B$ in a coincidence experiment that completely determined the kinematics of each event. The energy resolution was sufficient to identify the truly quasifree events, i.e., those that left the residual nucleus in its ground state. A comparison of our data with empirically normalized plane wave impulse approximation calculations shows reasonable agreement as long as only one parameter is varied at a time. Some effects of the nuclear shell structure can be seen. There is an indication that the ( $\frac{3}{2}$ , $\frac{3}{2}$ ) resonance may be narrowed inside a nucleus.

NUCLEAR REACTIONS ${}^{12}C$ ( $π^{+}$ , $π^{+} p$ ), $E = 130 - 200$ MeV; measured $σ (E, θ, E^{'})$ , PWIA analysis. Resolution ∼ 1 MeV, $θ_{π} = - 60 ° - 130 °$ , $θ_{p} = 30 ° - 45 °$ .

Backward production of high energy protons in the ( $p$ , $2 p$ ) reaction in ${}^{6}{Li}$

S. Frankel, W. Frati, C. F. Perdrisat, and O. B. Van Dyck

Phys. Rev. C 24, 2684 (1981) - Published 1 December, 1981

Show Abstract

Two magnetic spectrometers have been utilized to measure the momentum spectra and angular distributions of forwardly produced protons in coincidence with backwardly emitted protons (105°) of momenta $q = 0.35, 0.4, and 0.55$ GeV/c in the reaction $p (0.8 GeV) + {}^{6}{Li} \to p + p + X$ . The data demonstrates an unexpected new feature: the angular independence of the ratio of coincidence to forward singles spectra.

NUCLEAR REACTIONS ${}^{6}{Li}$ ( $p$ , $2 p$ ), ${}^{9}{Be}$ ( $p$ , $2 p$ ), "cumulative" region; deduced excitation spectrum, test of single particle approximation.

Kaon charge exchange on ${}^{3}H$

Manuel J. Páez and Rubin H. Landau

Phys. Rev. C 24, 2689 (1981) - Published 1 December, 1981

Show Abstract

The single charge exchange reaction ${}^{3}H$ ( $K^{+}$ , $K^{0}$ ) ${}^{3}{is}$ examined with a theoretical momentum space optical potential including realistic form factors for the distribution of matter and spin in the nucleus. The $K^{+}$ -nucleon amplitudes are calculated from two body phase shifts and extrapolated off shell with separable potentials. The elementary charge exchange amplitudes have large $P$ and $D$ wave parts and a large spin flip component. Differential and total cross sections for charge exchange from ${}^{3}H$ are presented for kaon energies from 0.4 to 1 GeV, and the sensitivity to the nuclear form factors is found to be high for appropriate kinematical conditions.

NUCLEAR REACTIONS ${}^{3}H$ ( $K^{+}$ , $K^{0}$ ) ${}^{3}{He}$ ; $E = 39 - 804$ MeV; $σ (θ)$ and $σ_{tot}$ ; theoretical calculation, momentum space optical potential; spin effects, subenergy shifts.

Atomic masses of ${}^{148}{Dy}$ and ${}^{148}{Tb}$ ( $T_{\frac{1}{2}} = 2.2$ min)

W. -D. Schmidt-Ott, R. Kantus, E. Runte, U. J. Schrewe, and R. Michaelsen

Phys. Rev. C 24, 2695 (1981) - Published 1 December, 1981

Show Abstract

In the electron capture decay of ${}^{148}{Dy}$ the decay energy has been determined from the experimental $\frac{EC (K)}{β^{+}}$ ratio to be $2652_{- 50}^{+ 65}$ keV, and in ${}^{148}{Tb}$ (2.2 min) decay, from the $\frac{EC}{β^{+}}$ ratio to be 5755±50 keV. The masses of these isotopes and of alpha-decaying precessors are compared with the predictions of current mass formulas. The subshell closure at $Z = 64$ is discussed.

RADIOACTIVITY ${}^{148}{Dy}$ , ${}^{148}{Tb}$ (2.2 min); measured $X γ$ , $γ γ$ -coin.; ${}^{148}{Dy}$ , ${}^{148}{Tb}$ (2.2 min); $Q$ values deduced.

Relativistic many-body theory

L. S. Celenza and C. M. Shakin

Phys. Rev. C 24, 2704 (1981) - Published 1 December, 1981

Show Abstract

Self-consistent field theories have had extensive application in the study of nonrelativistic systems. In the past decade there has been some interest in the use of relativistic self-consistent-field techniques for the study of strongly interacting systems such as finite nuclei and infinite nuclear matter. In nonrelativistic theories the standard analysis involves the determination of a new representation for the Hamiltonian in which the residual interaction admixes no one-particle, one-hole states into the self-consistent ground-state wave function. In lowest-order perturbation theory the next admixtures are of the two-particle, two-hole type. We demonstrate that the relativistic theory can be formulated in a similar fashion. In the relativistic theory the new representation is determined such that the residual interaction does not admix particle-hole states however, here "hole" refers to all occupied states including the negative energy states. Again the corrections to the theory involve the introduction of two-particle two-hole states, where "hole" is understood in the more general sense. In the relativistic theory the specification of the new representation requires the solution of a Dirac-Hartree, Dirac-Hartree-Fock, or Dirac-Brueckner-Hartree-Fock equation, the choice depending upon the nature of the physical system. Once the new representation is found, our techniques allow us to exhibit a useful form for the Hamiltonian of the relativistic system in which the residual interaction between the relativistic quasiparticles is given explicitly. The theory given here is readily extended to the study of finite systems where it provides the basis for a relativistic shell model of nuclear structure.

NUCLEAR STRUCTURE Derivation of relativistic Hartree-Fock and Brueckner-Hartree Fock theories; interaction between relativistic quasiparticles; dynamics of saturation in a relativistic model.

Select page:

Physical Review C

Recent Articles

Filter

Recent Issues

Absorptive breakup of ${}^{14}N$ projectiles

( ${}^{6}{Li}$ , $d$ ) reaction on ${}^{16}O$ and ${}^{28}{Si}$ at 75 MeV

Localized $l$ window from partial fusion reactions accompanied by proton, deuteron, and triton emission

Positive pion production by 149-166 MeV protons on ${}^{16}O$ and ${}^{28}{Si}$

Fusion behavior in time-dependent Hartree-Fock calculations of ${}^{86}{Kr}$ + ${}^{139}{La}$ and ${}^{84}{Kr}$ + ${}^{209}{Bi}$ collisions

Three-body calculations for reactions involving transfer of alpha cluster using the bound state approximation

Mass distributions for monoenergetic-neutron-induced fission of ${}^{235}U$

Nuclear level density and the mass distribution of fission fragments

$π NN$ , $π N Δ$ , and $π π ρ$ form factors from quasi-two-body hadronic reactions

Relativistically corrected impulse approximation in the presence of a local central potential

Relativistic effects, the deuteron $D$ -state, and backward $p - d$ scattering

Pion-nucleon interaction in the $P_{11}$ partial wave and the pion-nucleon vertex function

Distorted wave impulse approximation calculations of ( $π^{+}$ , $2 p$ ) reactions in a quasideuteron model

Parametrization of the elastic sector of the nucleon-nucleon scattering matrix. I.

Production of ${}^{38}{Ar}$ and ${}^{39}{Ar}$ in the interaction of gold and thorium with 1, 2.5, and 24 GeV protons

Quasifree scattering of positive pions on carbon

Backward production of high energy protons in the ( $p$ , $2 p$ ) reaction in ${}^{6}{Li}$

Kaon charge exchange on ${}^{3}H$

Atomic masses of ${}^{148}{Dy}$ and ${}^{148}{Tb}$ ( $T_{\frac{1}{2}} = 2.2$ min)

Relativistic many-body theory

Filter

Recent Issues

Filter

Article Lookup

Enter a citation