Survey of the (<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>,<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>t</mi></math></span>) reaction: Excitation of the isobaric analog of the giant dipole resonance

S. L. Tabor; C. C. Chang; M. T. Collins; G. J. Wagner; J. R. Wu; D. W. Halderson; F. Petrovich

doi:10.1103/PhysRevC.25.1253

Survey of the ( ${}^{3}{He}$ , $t$ ) reaction: Excitation of the isobaric analog of the giant dipole resonance

S. L. Tabor, C. C. Chang, M. T. Collins, G. J. Wagner, J. R. Wu, D. W. Halderson, and F. Petrovich

Phys. Rev. C 25, 1253 – Published 1 March 1982

Abstract

The ( ${}^{3}{He}$ , $t$ ) reaction at 130 and 170 MeV has been investigated on targets of ${}^{12}C$ , ${}^{16}O$ , ${}^{27}{Al}$ , ${}^{28}{Si}$ , ${}^{40}{Ca}$ , ${}^{46}{Ti}$ , and ${}^{90}{Zr}$ . Data for the ( ${}^{3}{He}$ , ${}^{3}{He}$ ′) reaction were measured simultaneously for reference purposes. Structure is observed in the spectra from the ( ${}^{3}{He}$ , ${}^{3}{He}$ ′) and ( ${}^{3}{He}$ , $t$ ) reactions at the expected positions of the giant quadrupole resonance and the isobaric analog of the giant dipole resonance, respectively. An angular distribution was measured for the suspected giant dipole resonance structure in the ${}^{40}{Ca}$ ( ${}^{3}{He}$ , $t$ ) ${}^{40}{Sc}$ reaction at 130 MeV. The data are reasonably described by a collective model calculation based on the Goldhaber-Teller model for the giant dipole resonance. Several other strong peaks at excitation energies below the giant dipole resonance are observed in the ( ${}^{3}{He}$ , $t$ ) spectra. Most notable of these are the ones at the expected positions for analogs of well known $1^{+}$ states and $1 ℏ ω$ stretched states in the targets.

NUCLEAR REACTIONS ${}^{12}C$ , ${}^{16}O$ , ${}^{27}{Al}$ , ${}^{28}{Si}$ , ${}^{46}{Ti}$ , ${}^{90}{Zr}$ ( ${}^{3}{He}$ , $t$ ) and ( ${}^{3}{He}$ , ${}^{3}{He}$ ′) $E = 130, 170$ MeV; measured $\frac{d σ}{d Ω}$ ( $E$ , $θ$ ); giant resonances; stretched states.

Received 15 January 1981

DOI:https://doi.org/10.1103/PhysRevC.25.1253

Authors & Affiliations

S. L. Tabor

Department of Physics, Florida State University, Tallahassee, Florida 32306 and Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742

C. C. Chang, M. T. Collins^*, G. J. Wagner^†, and J. R. Wu^‡

Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742

D. W. Halderson^§ and F. Petrovich

Department of Physics, Florida State University, Tallahassee, Florida 32306

^*Present address: Physics Division, Brookhaven National Laboratory, Upton, New York 11973.
^†Permanent address: Max-Planck-Institut für Kernphysik, 6900 Heidelberg, West Germany.
^‡Present address: Bell Laboratories, Naperville, Illinois 60540.
^§Present address: Physics Department, Western Michigan University, Kalamazoo, Michigan 49001.

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Vol. 25, Iss. 3 — March 1982

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Physical Review C

covering nuclear physics