Positive pion-nucleus elastic scattering at 40 MeV

M. Blecher; K. Gotow; D. Jenkins; F. Milder; F. E. Bertrand; T. P. Cleary; E. E. Gross; C. A. Ludemann; M. A. Moinester; R. L. Burman; M. Hamm; R. P. Redwine; M. Yates-Williams; S. Dam; C. W. Darden; R. D. Edge; D. J. Malbrough; T. Marks; B. M. Preedom

doi:10.1103/PhysRevC.20.1884

Positive pion-nucleus elastic scattering at 40 MeV

M. Blecher, K. Gotow, D. Jenkins, F. Milder, F. E. Bertrand, T. P. Cleary, E. E. Gross, C. A. Ludemann, M. A. Moinester, R. L. Burman, M. Hamm, R. P. Redwine, M. Yates-Williams, S. Dam, C. W. Darden, R. D. Edge, D. J. Malbrough, T. Marks, B. M. Preedom

School of Physics and Astronomy

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Abstract

Differential cross sections for elastic scattering of 40 MeV positive pions from C12, O16, Ca40, Zr90, and Pb208 were measured at 18 angles in the angular range 25A°-160A°. Relative uncertainties of 2.5% to 7% and overall normalization uncertainties of 4% to 7% were obtained. An optical potential fit of the data indicates that while the magnitudes of the strength parameters, except for Reb1, are different from values obtained from free πN scattering amplitudes, the variation of these magnitudes with target mass is roughly as predicted by the impulse approximation. Coulomb effects, especially in the cases of Zr90 and Pb208, are extremely important, but impossible to unambiguously separate from the strong interaction in the optical model. NUCLEAR REACTIONS Elastic scattering of 40 MeV π+ from C12, O16, Ca40, Zr90, Pb208. Angular distributions: 25A°θL160A°. Optical model and partialwave analysis of cross-section data.

Original language	English
Pages (from-to)	1884-1890
Number of pages	7
Journal	Physical Review C - Nuclear Physics
Volume	20
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.20.1884
State	Published - 1979

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Blecher, M., Gotow, K., Jenkins, D., Milder, F., Bertrand, F. E., Cleary, T. P., Gross, E. E., Ludemann, C. A., Moinester, M. A., Burman, R. L., Hamm, M., Redwine, R. P., Yates-Williams, M., Dam, S., Darden, C. W., Edge, R. D., Malbrough, D. J., Marks, T., & Preedom, B. M. (1979). Positive pion-nucleus elastic scattering at 40 MeV. Physical Review C - Nuclear Physics, 20(5), 1884-1890. https://doi.org/10.1103/PhysRevC.20.1884

@article{a2e5343021ad48458df9e70f7f2db67d,

title = "Positive pion-nucleus elastic scattering at 40 MeV",

abstract = "Differential cross sections for elastic scattering of 40 MeV positive pions from C12, O16, Ca40, Zr90, and Pb208 were measured at 18 angles in the angular range 25A°-160A°. Relative uncertainties of 2.5% to 7% and overall normalization uncertainties of 4% to 7% were obtained. An optical potential fit of the data indicates that while the magnitudes of the strength parameters, except for Reb1, are different from values obtained from free πN scattering amplitudes, the variation of these magnitudes with target mass is roughly as predicted by the impulse approximation. Coulomb effects, especially in the cases of Zr90 and Pb208, are extremely important, but impossible to unambiguously separate from the strong interaction in the optical model. NUCLEAR REACTIONS Elastic scattering of 40 MeV π+ from C12, O16, Ca40, Zr90, Pb208. Angular distributions: 25A°θL160A°. Optical model and partialwave analysis of cross-section data.",

author = "M. Blecher and K. Gotow and D. Jenkins and F. Milder and Bertrand, {F. E.} and Cleary, {T. P.} and Gross, {E. E.} and Ludemann, {C. A.} and Moinester, {M. A.} and Burman, {R. L.} and M. Hamm and Redwine, {R. P.} and M. Yates-Williams and S. Dam and Darden, {C. W.} and Edge, {R. D.} and Malbrough, {D. J.} and T. Marks and Preedom, {B. M.}",

year = "1979",

doi = "10.1103/PhysRevC.20.1884",

language = "אנגלית",

volume = "20",

pages = "1884--1890",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

}

Blecher, M, Gotow, K, Jenkins, D, Milder, F, Bertrand, FE, Cleary, TP, Gross, EE, Ludemann, CA, Moinester, MA, Burman, RL, Hamm, M, Redwine, RP, Yates-Williams, M, Dam, S, Darden, CW, Edge, RD, Malbrough, DJ, Marks, T & Preedom, BM 1979, 'Positive pion-nucleus elastic scattering at 40 MeV', Physical Review C - Nuclear Physics, vol. 20, no. 5, pp. 1884-1890. https://doi.org/10.1103/PhysRevC.20.1884

TY - JOUR

T1 - Positive pion-nucleus elastic scattering at 40 MeV

AU - Blecher, M.

AU - Gotow, K.

AU - Jenkins, D.

AU - Milder, F.

AU - Bertrand, F. E.

AU - Cleary, T. P.

AU - Gross, E. E.

AU - Ludemann, C. A.

AU - Moinester, M. A.

AU - Burman, R. L.

AU - Hamm, M.

AU - Redwine, R. P.

AU - Yates-Williams, M.

AU - Dam, S.

AU - Darden, C. W.

AU - Edge, R. D.

AU - Malbrough, D. J.

AU - Marks, T.

AU - Preedom, B. M.

PY - 1979

Y1 - 1979

N2 - Differential cross sections for elastic scattering of 40 MeV positive pions from C12, O16, Ca40, Zr90, and Pb208 were measured at 18 angles in the angular range 25A°-160A°. Relative uncertainties of 2.5% to 7% and overall normalization uncertainties of 4% to 7% were obtained. An optical potential fit of the data indicates that while the magnitudes of the strength parameters, except for Reb1, are different from values obtained from free πN scattering amplitudes, the variation of these magnitudes with target mass is roughly as predicted by the impulse approximation. Coulomb effects, especially in the cases of Zr90 and Pb208, are extremely important, but impossible to unambiguously separate from the strong interaction in the optical model. NUCLEAR REACTIONS Elastic scattering of 40 MeV π+ from C12, O16, Ca40, Zr90, Pb208. Angular distributions: 25A°θL160A°. Optical model and partialwave analysis of cross-section data.

AB - Differential cross sections for elastic scattering of 40 MeV positive pions from C12, O16, Ca40, Zr90, and Pb208 were measured at 18 angles in the angular range 25A°-160A°. Relative uncertainties of 2.5% to 7% and overall normalization uncertainties of 4% to 7% were obtained. An optical potential fit of the data indicates that while the magnitudes of the strength parameters, except for Reb1, are different from values obtained from free πN scattering amplitudes, the variation of these magnitudes with target mass is roughly as predicted by the impulse approximation. Coulomb effects, especially in the cases of Zr90 and Pb208, are extremely important, but impossible to unambiguously separate from the strong interaction in the optical model. NUCLEAR REACTIONS Elastic scattering of 40 MeV π+ from C12, O16, Ca40, Zr90, Pb208. Angular distributions: 25A°θL160A°. Optical model and partialwave analysis of cross-section data.

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SP - 1884

EP - 1890

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 5

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Positive pion-nucleus elastic scattering at 40 MeV

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