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R.C. Johnson

Bio: R.C. Johnson is an academic researcher from University of Surrey. The author has contributed to research in topics: Elastic scattering & Scattering. The author has an hindex of 22, co-authored 87 publications receiving 1498 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a treatment of deuteron stripping is developed in which the three-body effects associated with break-up in the nuclear field are included explicitly, and a distorted wave stripping matrix element similar to that of the DWBA is presented.

109 citations

Journal ArticleDOI
TL;DR: In this article, a rotational model for the core structure of one neutron halo nucleus is used to calculate the deformation parameter of the core and the charge to mass deformation ratio given by shell model calculations.

101 citations

Journal ArticleDOI
TL;DR: The emission of two protons from nuclei where this is the only decay channel is studied, and a three-body model is developed that gives substantially lower values for the width than predicted by the diproton model, but larger than from direct decay to the continuum.
Abstract: We study the emission of two protons from nuclei where this is the only decay channel. A three-body model is developed. We compare the ``diproton'' model with the three-body calculations. We present exploratory studies of the ${}^{19}\mathrm{Mg}$ and ${}^{48}\mathrm{Ni}$ ground states, which are good candidates for two-proton radioactivity. The two-proton width for the ${}^{17}\mathrm{Ne}{3/2}^{\ensuremath{-}}$ state is also estimated. Our calculations give substantially lower values for the width than predicted by the diproton model, but larger than from direct decay to the continuum.

84 citations

Journal ArticleDOI
TL;DR: In this paper, a transformed harmonic oscillator basis is used to provide an appropriate discrete and finite basis for treating the continuum part of the spectrum of the target's spectrum, where the Coulomb and nuclear interactions with a target are taken into account.
Abstract: The scattering of a weakly bound three-body system by a target is discussed. A transformed harmonic oscillator basis is used to provide an appropriate discrete and finite basis for treating the continuum part of the spectrum of the projectile. The continuum-discretized coupled-channels framework is used for the scattering calculations. The formalism is applied to different reactions, {sup 6}He+{sup 12}C at 229.8 MeV, {sup 6}He+{sup 64}Zn at 10 and 13.6 MeV, and {sup 6}He+{sup 208}Pb at 22 MeV, induced by the Borromean nucleus {sup 6}He. Both the Coulomb and nuclear interactions with a target are taken into account.

84 citations

Journal ArticleDOI
TL;DR: In this article, a single-folding procedure assuming an α+d(t) cluster structure for the projectile was used to obtain the potential of 6, 7 Li scattering from 58 Ni at E c.m. = 13-20 MeV.

82 citations


Cited by
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Journal ArticleDOI
01 Nov 1951-Nature
TL;DR: In this article, Sommerfeld presents a review of the theoretic aspects of Physik, including Mechanik, Elektrodynamik and Partielle Differentialgleichungen der Physik.
Abstract: Vorlesungen uber theoretische Physik Von Prof. Arnold Sommerfeld. Band 1: Mechanik. Vierte, neubearbeitete Auflage. Pp. xii + 276. 18 D. marks. Band 2: Mechanik der deformierbaren Medien. Pp. xv + 376 + 4 plates. 18 D. marks. Band 3: Elektrodynamik. Pp. xvi + 368. 18 D. marks. Band 6: Partielle Differentialgleichungen der Physik. Pp. xiii + 332. 18 D. marks. (Wiesbaden: Dieterich'sche Verlagsbuchhandlung, 1947–1949.)

669 citations

Journal ArticleDOI
TL;DR: A review of the evidence on the properties of the nuclei A = 8, 9 and 10, with emphasis on material leading to information about the structure of the A =8, 9, 10 systems is given in this paper.

643 citations

Journal ArticleDOI
TL;DR: In this article, the experimentally determined properties of energy levels of A = 21−44 nuclei are compiled and evaluated with emphasis on nuclear spectroscopy, and the available information on excitation energies, spins, parities, isospins, lifetimes or widths and observed decay is summarized in a master table.

593 citations

Journal ArticleDOI
TL;DR: This version of A = 9 differs from the published version in that it has corrected some errors discovered after the article went to press and reference key numbers have been changed to the NNDC/TUNL format.

571 citations