Energy dependence of low-energy pion double-charge-exchange on the calcium isotopes

M. J. Leitch; H. W. Baer; A. Klein; C. S. Mishra; Z. Weinfeld; E. Piasetzky; Y. Ezra; R. Weiss; C. Allgower; J. R. Comfort; J. Tinsley; D. H. Wright

doi:10.1016/0370-2693(92)90676-U

Energy dependence of low-energy pion double-charge-exchange on the calcium isotopes

M. J. Leitch, H. W. Baer, A. Klein, C. S. Mishra, Z. Weinfeld, E. Piasetzky, Y. Ezra, R. Weiss, C. Allgower, J. R. Comfort, J. Tinsley, D. H. Wright

Physics

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Abstract

The forward angle differential cross sections of (π⁺, π^-) reactions on the calcium isotopes to the double-isobaric-analog (DIAS) and ground states (GS) were measured between 25 and 65 MeV. These low-energy cross sections are up to an order of magnitude larger than those at resonance energies. The forward-angle excitation functions of ⁴²Ca, ⁴⁴Ca DIAS and ⁴⁴Ca GS transitions peak around 50 MeV. The ⁴⁸Ca DIAS cross section exhibits a minimum at about 50 MeV and that for the GS has a peak which is shifted to lower energy with a smaller cross section than that of the other nuclei. The observed behaviour is inconsistent with theoretical expectations.

Original language	English (US)
Pages (from-to)	157-161
Number of pages	5
Journal	Physics Letters B
Volume	294
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(92)90676-U
State	Published - Nov 12 1992

ASJC Scopus subject areas

Nuclear and High Energy Physics

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@article{0bdb8908e732486fb377a7272be68cbb,

title = "Energy dependence of low-energy pion double-charge-exchange on the calcium isotopes",

abstract = "The forward angle differential cross sections of (π+, π-) reactions on the calcium isotopes to the double-isobaric-analog (DIAS) and ground states (GS) were measured between 25 and 65 MeV. These low-energy cross sections are up to an order of magnitude larger than those at resonance energies. The forward-angle excitation functions of 42Ca, 44Ca DIAS and 44Ca GS transitions peak around 50 MeV. The 48Ca DIAS cross section exhibits a minimum at about 50 MeV and that for the GS has a peak which is shifted to lower energy with a smaller cross section than that of the other nuclei. The observed behaviour is inconsistent with theoretical expectations.",

author = "Leitch, {M. J.} and Baer, {H. W.} and A. Klein and Mishra, {C. S.} and Z. Weinfeld and E. Piasetzky and Y. Ezra and R. Weiss and C. Allgower and Comfort, {J. R.} and J. Tinsley and Wright, {D. H.}",

note = "Funding Information: minating discussions with N. Auerbach, E. Bleszyn-ski, M. Bleszynski, W.R. Gibbs, J.N. Ginocchio, R. Glauber and W.B. Kaufmann are gratefully acknowledged. This work was supported in part by the National Science Foundation, the US Department of Energy, and by the basic research foundation administered by the Israel Academy of Science and Humanities.",

year = "1992",

month = nov,

day = "12",

doi = "10.1016/0370-2693(92)90676-U",

language = "English (US)",

volume = "294",

pages = "157--161",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "2",

}

TY - JOUR

T1 - Energy dependence of low-energy pion double-charge-exchange on the calcium isotopes

AU - Leitch, M. J.

AU - Baer, H. W.

AU - Klein, A.

AU - Mishra, C. S.

AU - Weinfeld, Z.

AU - Piasetzky, E.

AU - Ezra, Y.

AU - Weiss, R.

AU - Allgower, C.

AU - Comfort, J. R.

AU - Tinsley, J.

AU - Wright, D. H.

N1 - Funding Information: minating discussions with N. Auerbach, E. Bleszyn-ski, M. Bleszynski, W.R. Gibbs, J.N. Ginocchio, R. Glauber and W.B. Kaufmann are gratefully acknowledged. This work was supported in part by the National Science Foundation, the US Department of Energy, and by the basic research foundation administered by the Israel Academy of Science and Humanities.

PY - 1992/11/12

Y1 - 1992/11/12

N2 - The forward angle differential cross sections of (π+, π-) reactions on the calcium isotopes to the double-isobaric-analog (DIAS) and ground states (GS) were measured between 25 and 65 MeV. These low-energy cross sections are up to an order of magnitude larger than those at resonance energies. The forward-angle excitation functions of 42Ca, 44Ca DIAS and 44Ca GS transitions peak around 50 MeV. The 48Ca DIAS cross section exhibits a minimum at about 50 MeV and that for the GS has a peak which is shifted to lower energy with a smaller cross section than that of the other nuclei. The observed behaviour is inconsistent with theoretical expectations.

AB - The forward angle differential cross sections of (π+, π-) reactions on the calcium isotopes to the double-isobaric-analog (DIAS) and ground states (GS) were measured between 25 and 65 MeV. These low-energy cross sections are up to an order of magnitude larger than those at resonance energies. The forward-angle excitation functions of 42Ca, 44Ca DIAS and 44Ca GS transitions peak around 50 MeV. The 48Ca DIAS cross section exhibits a minimum at about 50 MeV and that for the GS has a peak which is shifted to lower energy with a smaller cross section than that of the other nuclei. The observed behaviour is inconsistent with theoretical expectations.

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U2 - 10.1016/0370-2693(92)90676-U

DO - 10.1016/0370-2693(92)90676-U

M3 - Article

AN - SCOPUS:0001739030

SN - 0370-2693

VL - 294

SP - 157

EP - 161

JO - Physics Letters B

JF - Physics Letters B

IS - 2

ER -

Energy dependence of low-energy pion double-charge-exchange on the calcium isotopes

Abstract

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