Proton-Neutron Elastic Scattering on a Deuterium Target

M. L. Marshak; P. Schmueser; J. L. Day; P. Kalbaci; A. D. Krisch; J. K. Randolph; G. J. Marmer; L. G. Ratner

doi:10.1103/PhysRevD.2.1808

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Proton-Neutron Elastic Scattering on a Deuterium Target

M. L. Marshak^*, P. Schmueser^†, J. L. Day^‡, P. Kalbaci, A. D. Krisch, and J. K. Randolph^§

G. J. Marmer and L. G. Ratner

Harrison M. Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48104

Accelerator Division, Argonne National Laboratory, Argonne, Illinois 60439

^*Present address: School of Physics, University of Minnesota, Minneapolis, Minn. 55455.
^†Present address: Department of Physics, University of Hamburg, 2000 Hamburg-50, West Germany.
^‡Present address: Department of Physics, University of Pennsylvania, Philadelphia, Pa. 19104.
^§Present address: Department of Physics, Haverford College, Haverford, Pa. 19041.

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Phys. Rev. D 2, 1808 – Published 1 November, 1970

DOI: https://doi.org/10.1103/PhysRevD.2.1808

Abstract

We have tested the feasibility of measuring the ratio of proton-neutron to proton-proton elastic scattering using the second extracted proton beam of the Argonne ZGS and a liquid-deuterium target. The forward proton was detected by a 35-m-long spectrometer consisting of magnets and scintillation and Čerenkov counters. The recoil nucleon was detected by a steel-scintillator sandwich counter. The efficiency of this counter was measured using tagged neutron in coincidence with the spectrometer and calculated using a Monte Carlo simulation of the nuclear cascade. A scintillation counter determined whether the recoil nucleon was charged or neutral. At a test point of $p_{0} = 12.4$ GeV/c, $θ^{*} = 37 °$ , and $t = - 2.2$ ${(G e V / c)}^{2}$ , we found a $pn$ -to- $pp$ cross-section ratio of 1.05±0.14. The $pp$ cross section was ${(\frac{d σ}{d Ω})}_{c . m .} = 5.8 \pm 0.6$ μb/sr, and the $pn$ cross section was ${(\frac{d σ}{d Ω})}_{c . m .} = 6.1 \pm 1$ μb/sr. The ratio of $pp$ scattering from deuterium to $pp$ scattering from hydrogen, corrected for geometrical effects, was 0.75±0.09. We discuss the future of this technique for measuring $pn$ cross sections and compare the results of the test with the predictions of the Glauber multiple-scattering formalism. We also plot available $pn$ data as a function of ${β_{c . m .}}^{2} {p_{⊥}}^{2}$ .

References (21)

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Omitted endnote
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Omitted endnote
A. D. Krisch, Phys. Rev. Letters 19, 1149 (1967)
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[c1] G. Cocconi, V. T. Cocconi, A. D. Krisch, J. Orear, R. Rubinstein, D. B. Scarl, W. F. Baker, E. W. Jenkins, A. L. Read, and B. T. Ulrich, Phys. Rev. 138, B165 (1965) J. V. Allaby, G. Bellettini, G. Cocconi, M. L. Good, A. N. Diddens, G. Matthiae, E. S. Sacharidis, A. Silverman, and A. M. Wetherall, Phys. Letters 25B, 156 (1967)

[c2] M. L. Perl, J. Cox, M. J. Longo, and M. N. Kreisler, Phys. Rev. D 1, 1857 (1970) B. G. Gibbard, L. W. Jones, M. J. Longo, J. R. O'Fallon, J. Cox, M. L. Perl, W. T. Toner, and M. N. Kreisler, Phys. Rev. Letters 24, 22 (1970) J. Engler, K. Horn, J. Konig, F. Monnig, P. Schludecker, H. Schopper, P. Sievers, H. Ullrich, and K. Runge, Phys. Letters 29B, 321 (1969)

[c3] W. Galbraith, E. Jenkins, T. Kycia, B. Leontic, R. Phillips, and A. Read, Phys. Rev. 138, B913 (1965)

[c4] J. L. Day, N. P. Johnson, A. D. Krisch, M. L. Marshak, J. K. Randolph, P. Schmueser, G. J. Marmer, and L. G. Ratner, Phys. Rev. Letters 23, 1055 (1969) J. L. Day, thesis, University of Michigan, 1970 (unpublished)

[c5] F. Hornstra, Jr., and J. R. Simanton, Nucl. Instr. Methods 68, 138 (1969) J. R. Simanton, R. F. Margnardt, and F. Hornstra, Jr., ibid. 68, 209 (1969)

[c6] F. Hornstra, Jr., ZGS Report No. QR68-2, 1968 (unpublished)

[c7] M. L. Marshak and P. Schmueser, Nucl. Instr. Methods 85 (to be published, 1970)

[c8] J. Ranft, Nucl. Instr. Methods 48, 133 (1967) T. W. Armstrong and R. G. Alsmiller, Jr., Nucl. Sci. Eng. 33, 291 (1968)

[c9] V. S. Barashenkov, V. M. Maltsev, I. Patera, and V. D. Toneev, Fortschr. Physik 14, 357 (1966)

[c10] D. F. Crawford and H. Messel, Nucl. Phys. 61, 145 (1965)

[c11] S. P. Shen, BNL Report No. BNL-8721, 1964 (unpublished)

[c12] Omitted endnote

[c13] C. M. Ankenbrandt, A. R. Clark, Bruce Cork, T. Elioff, L. T. Kerth, and W. A. Wenzel, Phys. Rev. 170, 1223 (1968)

[c14] N. Barash-Schmidt, A. Barbaro-Galtieri, L. R. Price, M. Roos, A. H. Rosenfeld, P. Söding, C. G. Wohl, M. Roos, and G. Conforto, Rev. Mod. Phys. 41, 109 (1969)

[c15] V. Franco and R. J. Glauber, Phys. Rev. 142, 1195 (1966) J. V. Allaby, A. N. Diddens, R. J. Glauber, A. Klovning, O. Kofoed-Hansen, E. J. Sacharidis, K. Schlüpmann, A. M. Thorndike, and A. M. Wetherall, Phys. Letters 30B, 549 (1969)

[c16] M. J. Moravcsik, Nucl. Phys. 7, 113 (1958)

[c17] J. V. Allaby, A. N. Diddens, A. Klovning, E. Lillethun, E. J. Sacharidis, K. Schlüpmann, and A. M. Wetherell, Phys. Letters 27B, 49 (1968)

[c18] Omitted endnote

[c19] A. D. Krisch, Phys. Rev. Letters 19, 1149 (1967)

[c20] A. D. Krisch, in Lectures in Theoretical Physics, edited by W. E. Brittin (University of Colorado Press, Boulder, Colo., 1966), Vol. IX

[c21] A. T. Murray, L. Riddiford, G. H. Grayer, T. W. Jones, and Y. Tanimura, Nuovo Cimento 49A, 261 (1967)

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