Observation of the (π−, π−n) and (π+, π+p) reactions at 165 MeV

doi:10.1016/0370-2693(82)90082-X

Physics Letters B

Volume 114, Issue 6, 12 August 1982, Pages 414-418

https://doi.org/10.1016/0370-2693(82)90082-X Get rights and content

Abstract

The (π⁻, π⁻n) and the (π⁺, π⁺p) reactions were studied on C, Fe, and Bi at 165 MeV by coincidence measurement o outgoing particles. The nucleon-knockout reaction is the dominant inelastic process at backward pion-scattering angles at this energy. The quasifree (π⁻, π⁻n) and (π⁺, π⁺p) cross sections were determined from the π-N an correlations. Their σ_qf(π⁻, π⁻n)/σ_qf(π⁺, π⁺p) ratio is consistent with unity for C and is larger than the N/Z ratio for the heavier nuclei.

References (13)

I. Navon
Phys. Rev. Lett.
(1979)
I. Navon
Phys. Rev.
(1980)
D. Ashery
Phys. Rev.
(1981)
C.H.Q. Ingram
Meson-nuclear physics-1979
S.M. Levenson
Phys. Rev. Lett.
(1981)
L.W. Swenson
Phys. Rev. Lett.
(1978)

There are more references available in the full text version of this article.

Cited by (6)

The pion optical potential and its application to reaction processes
1983, Nuclear Physics, Section A
The gross features of the pion-nucleus interaction are studied within the framework of an optical potential approach. The optical potential is determined by a systematic analysis of the data on pionic atoms and elastic scattering. It is then decomposed into quasi-free and absorption terms through theoretical consideration of the reactive content. A method of calculating the absorption cross section using the optical potential with the above decomposition is proposed. It takes into account not only direct absorption from the elastic channel but also the absorption after the quasi-free processes. The calculated absorption cross sections are in reasonable agreement with the observed ones. The cross sections for inelastic, single-charge-exchange and double-charge-exchange processes are calculated as an extended application of the method. The results are consistent with the available data. Inclusive spectra of pions and protons are also considered in this approach. An application to the (γ, π) reaction is briefly discussed.
Coincidence measurements of the (+,0p) reaction at T+=165 MeV
1991, Physical Review C
Low energy inelastic scattering from nuclei to the continuum
1986, Physical Review C
Inelastic scattering of + and - Mesons from He3 and He4 at energies of 350, 400, and 475 MeV
1985, Physical Review C
Interference effects in (N) reactions
1984, Physical Review C
Pion-induced quasifree knockout and charge-exchange reactions: A possible probe of neutron density at the nuclear surface
1983, Physical Review C

^☆: We thank Professor C. Joseph for the use of the detector array. Illuminating discussions with Drs. J. Alster, J.M. Eisenberg, Z. Fraenkel, F. Lenz, E. Levin, E. Moniz, and A.W. Thomas are gratefully acknowledged. The Tel Aviv University group is grateful for the warm hospitality and support of the Schweizerisches Institut für Nuklearforschung. This work is also supported in part by the Israeli Commission for Basic Research.

¹: Present address: LAMPF, Los Alamos, NM 87545, USA.

²: Supported by DOE Contract No. W-31-109-ENG-38; Permanent address: Tel Aviv University, Israel.

³: Present address: SIN, CH-5234 Villigen, Switzerland.

⁴: Present address: Caltech, Pasadena, CA, USA.

View full text

Physics Letters B

Observation of the (π−, π−n) and (π+, π+p) reactions at 165 MeV☆

Abstract

Phys. Rev. Lett.

Phys. Rev.

Phys. Rev.

Meson-nuclear physics-1979

Phys. Rev. Lett.

Phys. Rev. Lett.

The pion optical potential and its application to reaction processes

Coincidence measurements of the (+,0p) reaction at T+=165 MeV

Low energy inelastic scattering from nuclei to the continuum

Inelastic scattering of + and - Mesons from He3 and He4 at energies of 350, 400, and 475 MeV

Interference effects in (N) reactions

Pion-induced quasifree knockout and charge-exchange reactions: A possible probe of neutron density at the nuclear surface

Observation of the (π⁻, π⁻n) and (π⁺, π⁺p) reactions at 165 MeV☆