TY - JOUR
T1 - Helium ions from the interaction of 70-MeV pions with nuclei
AU - Doron, A.
AU - Altman, A.
AU - Ashery, D.
AU - Shamai, Y.
AU - Yavin, A. I.
AU - Julien, J.
AU - Cassagnou, Y.
AU - Jackson, H. E.
AU - Legrain, R.
AU - Palmeri, A.
AU - Barbarino, S.
PY - 1978
Y1 - 1978
N2 - He ions emitted in the interaction of 70-MeV pions with carbon, aluminum, nickel, silver, and gold were measured directly at θ=90°. Cross sections and energy spectra are presented. Calculations of intranuclear cascades followed by evaporation reproduced the experimental data reasonably well. The results of the calculations imply that: (1) pion absorption in flight plays a major role in reactions in which α particles are emitted; and (2) one-"α"-removal lines, observed in deexcitation γ-ray experiments, do not imply large probability for real α emission. The π- to π+ ratio of cross sections was found to be about 1.4. NUCLEAR REACTIONS C, Al, Ni, Ag, Au (π-,α+anything), Eπ=70 MeV; measured He energy spectra; dσdΩ(90°). Natural targets; evaporation analysis.
AB - He ions emitted in the interaction of 70-MeV pions with carbon, aluminum, nickel, silver, and gold were measured directly at θ=90°. Cross sections and energy spectra are presented. Calculations of intranuclear cascades followed by evaporation reproduced the experimental data reasonably well. The results of the calculations imply that: (1) pion absorption in flight plays a major role in reactions in which α particles are emitted; and (2) one-"α"-removal lines, observed in deexcitation γ-ray experiments, do not imply large probability for real α emission. The π- to π+ ratio of cross sections was found to be about 1.4. NUCLEAR REACTIONS C, Al, Ni, Ag, Au (π-,α+anything), Eπ=70 MeV; measured He energy spectra; dσdΩ(90°). Natural targets; evaporation analysis.
UR - http://www.scopus.com/inward/record.url?scp=35949037027&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.18.961
DO - 10.1103/PhysRevC.18.961
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AN - SCOPUS:35949037027
SN - 0556-2813
VL - 18
SP - 961
EP - 968
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 2
ER -