Unique Determination of the Amplitude and Phase for the Population of the Giant-Dipole Resonance in the Reaction <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>12</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mrow><msub><mrow><mi>p</mi></mrow><mrow><mi mathvariant="normal">pol</mi></mrow></msub></mrow><mo>,</mo><mi> </mi><mrow><msub><mrow><mi>γ</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">N</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>13</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

K. A. Snover; P. G. Ikossi; E. G. Adelberger; K. T. Lesko

doi:10.1103/PhysRevLett.44.927

Unique Determination of the Amplitude and Phase for the Population of the Giant-Dipole Resonance in the Reaction ${}^{12}C (p_{pol}, γ_{0}) {}^{13}N$

K. A. Snover, P. G. Ikossi, E. G. Adelberger, and K. T. Lesko

Phys. Rev. Lett. 44, 927 – Published 7 April 1980

Abstract

The interference between the $E_{p} = 14.23$ MeV $M 1 (E 2)$ $T = \frac{3}{2}$ resonance and the $E 1$ giant-dipole-resonance "background" in the reaction ${}^{12}C (p_{pol}, γ_{0}) {}^{13}N$ is used to determine uniquely the $E 1$ reaction amplitudes. The $E 1$ capture is found to be predominantly $d$ wave, in agreement with the basic shell-model description of the nuclear giant dipole resonance.