Measurement of the <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></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mo>(</mo></mrow><mrow><mn>3</mn></mrow></msup></mrow></math>He, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>15</mn></mrow></msup></mrow></math>N reaction cross section near threshold

J. Homolka; W. Schott; W. Wagner; W. Wilhelm; R. D. Bent; M. Fatyga; R. E. Pollock; M. Saber; R. E. Segel; P. Kienle

doi:10.1103/PhysRevC.38.2686

Measurement of the ${}^{12}C$ $(^{3}$ He, $π^{+}$ $)^{15}$ N reaction cross section near threshold

J. Homolka, W. Schott, W. Wagner, W. Wilhelm, R. D. Bent, M. Fatyga, R. E. Pollock, M. Saber, R. E. Segel, and P. Kienle

Phys. Rev. C 38, 2686 – Published 1 December 1988

Abstract

The pionic fusion reaction ${}^{12}{He}$ , $π^{+}$ $)^{15}$ N has been measured at 170.2 and 236.3 MeV bombarding energy using recoil detection. At $T_{{}^{3}{He}}$ =170.2 MeV the angle-integrated cross section for the population of both the ${}^{15}N_{g . s .}$ and a broad group of unresolved ${}^{15}N$ excited states between $E_{x}$ =6 and 10 MeV is less than 0.03 nb. At $T_{{}^{3}{He}}$ =236.3 MeV the total cross section summed over both groups is (0.8±0.2) nb.