Study of the Breakup Reaction <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>8</mn></mrow></msup></mrow><mrow><msup><mrow><mi>B</mi><mo>→</mo><mi></mi></mrow><mrow><mn>7</mn></mrow></msup></mrow><mi mathvariant="normal">Be</mi><mi mathvariant="normal"></mi><mo>+</mo><mi></mi><mi mathvariant="italic">p</mi></math></span>: Absorption Effects and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">E</mi><mn>2</mn><mn></mn></math></span> Strength

J. H. Kelley; Sam M. Austin; A. Azhari; D. Bazin; J. A. Brown; H. Esbensen; M. Fauerbach; M. Hellström; S. E. Hirzebruch; R. A. Kryger; D. J. Morrissey; R. Pfaff; C. F. Powell; E. Ramakrishnan; B. M. Sherrill; M. Steiner; T. Suomijärvi; M. Thoennessen

doi:10.1103/PhysRevLett.77.5020

Study of the Breakup Reaction $^{8} {B \to}^{7} Be + p$ : Absorption Effects and $E 2$ Strength

J. H. Kelley, Sam M. Austin, A. Azhari, D. Bazin, J. A. Brown, H. Esbensen, M. Fauerbach, M. Hellström, S. E. Hirzebruch, R. A. Kryger, D. J. Morrissey, R. Pfaff, C. F. Powell, E. Ramakrishnan, B. M. Sherrill, M. Steiner, T. Suomijärvi, and M. Thoennessen

Phys. Rev. Lett. 77, 5020 – Published 16 December 1996

Abstract

Distributions of parallel and transverse momenta for $^{7}$ Be fragments formed in the breakup of $^{8}$ B have been measured at $41 A MeV$ . The $p_{∥}$ distributions are narrow ( $81 \pm 4$ and $62 \pm 3 MeV / c$ FWHM for Be and Au targets, respectively), comparable to those of neutron halo nuclei. Reaction mechanisms influence the $^{7}$ Be momentum distributions, so they do not directly reflect the valence proton momentum wave function. We present reaction models that reproduce the distributions.

Received 9 July 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.5020

Authors & Affiliations

J. H. Kelley^1,2, Sam M. Austin^1,2, A. Azhari^1,2, D. Bazin¹, J. A. Brown¹, H. Esbensen⁴, M. Fauerbach^1,2, M. Hellström¹, S. E. Hirzebruch¹, R. A. Kryger¹, D. J. Morrissey^1,3, R. Pfaff^1,2, C. F. Powell^1,3, E. Ramakrishnan^1,2, B. M. Sherrill^1,2, M. Steiner^1,2, T. Suomijärvi¹, and M. Thoennessen^1,2

¹National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
²Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
³Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
⁴Physics Division, Argonne National Laboratory, Argonne, Illinois 60439