Out of Plane Measurements of the Decay Neutron from the Giant Resonance in the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>12</mn></mrow></msup></mrow><mi>C</mi><mo>(</mo><mi mathvariant="italic">e</mi><mo>,</mo><mrow><msup><mrow><mi mathvariant="italic">e</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow><mi mathvariant="italic">n</mi><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>11</mn></mrow></msup></mrow><mi>C</mi></math></span> Reaction

M. Oikawa; T. Saito; K. Takahisa; Y. Suga; K. Kino; T. Nakagawa; T. Tohei; K. Abe; H. Ueno

doi:10.1103/PhysRevLett.84.2338

Out of Plane Measurements of the Decay Neutron from the Giant Resonance in the $^{12} C (e, e^{'} n)^{11} C$ Reaction

M. Oikawa, T. Saito, K. Takahisa, Y. Suga, K. Kino, T. Nakagawa, T. Tohei, K. Abe, and H. Ueno

Phys. Rev. Lett. 84, 2338 – Published 13 March 2000

Abstract

Out of plane measurements of the angular correlations for the $^{12} C ({e, e}^{'} n)$ reaction have been performed for the first time in the giant resonance region. The cross sections were directly separated into the longitudinal and transverse, longitudinal-transverse, and transverse-transverse components. The cross section at the peak of the giant resonance ( $ω = 22.5 MeV$ ) has been found to be almost all longitudinal. It was reproduced by the multipole expansion with $E 0$ and $E 2$ components besides $E 1$ . The longitudinal-transverse component might have a maximum around 24 MeV. The transverse-transverse component is very small over the giant resonance.

Received 7 September 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.2338

Authors & Affiliations

M. Oikawa^*, T. Saito, K. Takahisa^†, Y. Suga^‡, and K. Kino

Laboratory of Nuclear Science, Tohoku University, Mikamine, Taihakuku, Sendai 982-0826, Japan

T. Nakagawa and T. Tohei^§

Department of Physics, Tohoku University, Aramaki, Aobaku, Sendai 980-8578, Japan

K. Abe

Department of Nuclear Engineering, Tohoku University, Aramaki, Aobaku, Sendai 980-8579, Japan

H. Ueno

Department of Physics, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan

^*Present address: 5th Research Center, Technical Research & Development Institute, Japan Defense Agency, Nagase, Yokosuka 239-0826, Japan.
^†Present address: Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047, Japan.
^‡Present address: Hitachi Software Engineering Co., Nakase, Mihamaku, Chiba 261-0023, Japan.
^§Present address: Tohoku Institute of Technology, Kasumicho, Taihakuku, Sendai 982-8577, Japan.