Study of the Reactions <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Be</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>9</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow><mo>(</mo><mi>p</mi><mo>,</mo><mi> </mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">C</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>10</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> and <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><mi>p</mi><mo>,</mo><mi> </mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>)</mo><mrow><mmultiscripts><mrow><mi mathvariant="normal">O</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>13</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> at 613 MeV

P. Couvert; G. Bruge; R. Beurtey; A. Boudard; A. Chaumeaux; M. Garçon; D. Garreta; P. C. Gugelot; G. A. Moss; S. Platchkov; J. P. Tabet; Y. Terrien; J. Thirion; L. Bimbot; Y. Le Bornec; B. Tatischeff

doi:10.1103/PhysRevLett.41.530

Study of the Reactions ${}^{9}{Be} (p, π^{-}) {}^{10}C$ and ${}^{12}C (p, π^{-}) {}^{13}O$ at 613 MeV

P. Couvert, G. Bruge, R. Beurtey, A. Boudard, A. Chaumeaux, M. Garçon, D. Garreta, P. C. Gugelot, G. A. Moss, S. Platchkov, J. P. Tabet, Y. Terrien, J. Thirion, L. Bimbot, Y. Le Bornec, and B. Tatischeff

Phys. Rev. Lett. 41, 530 – Published 21 August 1978

Abstract

Negative-pion production leading to discrete excitation levels of the residual nucleus has been investigated on ${}^{9}{Be}$ and ${}^{12}C$ targets with 613-MeV protons. On the first seen spectra of ${}^{13}O$ a strong excited peak is observed at 2.82 ∓ 0.24 MeV in excitation energy. The resulting cross sections are found to be far below previously published theoretical predictions.

Received 12 June 1978

DOI:https://doi.org/10.1103/PhysRevLett.41.530

Authors & Affiliations

P. Couvert, G. Bruge, R. Beurtey, A. Boudard, A. Chaumeaux, M. Garçon, D. Garreta, P. C. Gugelot^*, G. A. Moss^†, S. Platchkov^‡, J. P. Tabet, Y. Terrien, and J. Thirion

Service de Physique Nucléaire à Moyenne Energie, Centre d'Etudes Nucléaires de Saclay, 91190 Sif-sur-Yvette, France

L. Bimbot, Y. Le Bornec, and B. Tatischeff

Institut de Physique Nucléaire, 91406 Orsay, France

^*Present address: Department of Physics, University of Virginia, Charlottesville, Va. 22901.
^†Present address: Department of Physics, Nuclear Research, University of Alberta, Edmonton 7, Alberta T6G 2E1, Canada.
^‡Present address: Département de Physique Nucléaire et Hautes Energies, Centre d'Etudes Nucléaires, Saclay, France.