Polarized triton elastic scattering at 17 MeV

R. A. Hardekopf; R. F. Haglund, Jr; G. G. Ohlsen; W. J. Thompson; L. R. Veeser

doi:10.1103/PhysRevC.21.906

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Polarized triton elastic scattering at 17 MeV

R. A. Hardekopf, R. F. Haglund, Jr., G. G. Ohlsen, W. J. Thompson^*, and L. R. Veeser

Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545

^*Permanent address: Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27514.

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Phys. Rev. C 21, 906 – Published 1 March, 1980

DOI: https://doi.org/10.1103/PhysRevC.21.906

Abstract

We present differential-cross-section and analyzing-power angular distributions for the elastic scattering of polarized tritons from 13 nuclei with $40 \leq A \leq 208$ . Data obtained at an energy of 17 MeV and in the angular range $20 ° \leq θ \leq 160 °$ are the basis for an optical-model analysis in which parameters which fit both observables simultaneously are determined. It is observed that the analyzing-power data delimit the real potential well parameters much more precisely than do cross-section data alone. Although the spin-orbit potential is less well defined, the average spin-orbit well depth is $V_{so} = 6.2 \pm 1.5$ MeV with geometry parameters similar to those for nucleons. The spin-orbit volume integrals are about a factor of 3 greater than predicted from simple folding models.

NUCLEAR REACTIONS ${}^{40}{Ca}$ , ${}^{46}{Ti}$ , ${}^{48}{Ti}$ , ${}^{54}{Fe}$ , ${}^{56}{Fe}$ , ${}^{58}{Ni}$ , ${}^{60}{Ni}$ , ${}^{68}{Zn}$ , ${}^{90}{Zr}$ , ${}^{94}{Zr}$ , ${}^{116}{Sn}$ , ${}^{140}{Ce}$ , ${}^{208}{Pb}$ ( $t$ , $t$ ), $E = 17$ MeV; measured $σ (θ)$ , $A_{y} (θ)$ ; optical-model analysis.

References (32)

F. G. Perey, Phys. Rev. 131, 745 (1963) F. D. Becchetti and G. W. Greenlees, ibid. 182, 1190 (1969)
O. Karban, S. Oh, and W. B. Powell, Phys. Rev. Lett. 33, 1438 (1973)
R. A. Hardekopf, in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975, edited by W. Grüebler and V. König (Birkhâser, Basel, 1976), p. 865
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R. A. Hardekopf, L. R. Veeser, and P. W. Keaton, Jr., Phys. Rev. Lett. 35, 1623 (1975)
P. A. Schmelzbach, R. A. Hardekopf, R. F. Haglund, Jr., and G. G. Ohlsen, Phys. Rev. C 17, 16 (1978)
G. G. Ohlsen and P. A. Lovoi, in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975 (see [3]), p. 907
R. A. Hardekopf, G. G. Ohlsen, R. V. Poore, and Nelson Jarmie, Phys. Rev. C 13, 2127 (1976)
G. G. Ohlsen and P. W. Keaton, Jr., Nucl. Instrum. Methods 109, 41 (1973)
E. R. Flynn, D. D. Armstrong, J. G. Berry, and A. G. Blair, Phys. Rev. 182, 1113 (1969)
R. J. Eastgate, W. J. Thompson, and R. A. Hardekopf, Comput. Phys. Commun. 5, 69 (1973)
P. Schwandt, Indiana University (unpublished)
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J. C. Hafele, E. R. Flynn, and A. G. Blair, Phys. Rev. 155, 1238 (1967)
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P. W. Keaton, Jr., in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975 (see [3]), p. 173
J. R. Shepard and J. J. Kraushaar, University of Colorado NPL Tech. Progress Report, 1976 (unpublished), p. 70
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[c1] F. G. Perey, Phys. Rev. 131, 745 (1963) F. D. Becchetti and G. W. Greenlees, ibid. 182, 1190 (1969)

[c2] O. Karban, S. Oh, and W. B. Powell, Phys. Rev. Lett. 33, 1438 (1973)

[c3] R. A. Hardekopf, in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975, edited by W. Grüebler and V. König (Birkhâser, Basel, 1976), p. 865

[c4] S. Roman, A. K. Basak, J. B. A. England, O. Karban, G. C. Morrison, and J. M. Nelson, Nucl. Phys. A284, 365 (1977) O. Karban, W. E. Burcham, J. B. A. England, R. G. Harris, and S. Roman, ibid. A292, 1 (1977)

[c5] R. A. Hardekopf, L. R. Veeser, and P. W. Keaton, Jr., Phys. Rev. Lett. 35, 1623 (1975)

[c6] P. A. Schmelzbach, R. A. Hardekopf, R. F. Haglund, Jr., and G. G. Ohlsen, Phys. Rev. C 17, 16 (1978)

[c7] G. G. Ohlsen and P. A. Lovoi, in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975 (see [3]), p. 907

[c8] R. A. Hardekopf, G. G. Ohlsen, R. V. Poore, and Nelson Jarmie, Phys. Rev. C 13, 2127 (1976)

[c9] G. G. Ohlsen and P. W. Keaton, Jr., Nucl. Instrum. Methods 109, 41 (1973)

[c10] E. R. Flynn, D. D. Armstrong, J. G. Berry, and A. G. Blair, Phys. Rev. 182, 1113 (1969)

[c11] R. J. Eastgate, W. J. Thompson, and R. A. Hardekopf, Comput. Phys. Commun. 5, 69 (1973)

[c12] P. Schwandt, Indiana University (unpublished)

[c13] R. N. Glover and A. D. W. Jones, Nucl. Phys. 81, 268 (1966)

[c14] J. C. Hafele, E. R. Flynn, and A. G. Blair, Phys. Rev. 155, 1238 (1967)

[c15] P. P. Urone, L. W. Put, H. H. Chang, and B. W. Ridley, Nucl. Phys. A163, 225 (1971)

[c16] S. Mukhopadhyay, D. K. Srivastava, and N. K. Ganguly, Nucl. Phys. A257, 264 (1976)

[c17] J. Nurzynski, Nucl. Phys. A246, 333 (1975)

[c18] F. D. Becchetti, Jr., and G. W. Greenlees, in Proceedings of the Third International Symposium on Polarization Phenomena in Nuclear Reactions, edited by H. Barschall and W. Haeberli (Univ. of Wisconsin Press, Madison, Wisconsin, 1970), p. 682 F. D. Becchetti, W. Makofske, and G. W. Greenlees, Nucl. Phys. A190, 437 (1972)

[c19] S. Watanabe, Nucl. Phys. 8, 484 (1958)

[c20] A. Y. Abul-Magd and M. El-Nadi, Prog. Theor. Phys. 35, 798 (1966)

[c21] P. W. Keaton, Jr., E. Aufdembrink, and L. R. Veeser, Los Alamos Scientific Laboratory Report No. LA-4379-MS, 1970 (unpublished)

[c22] P. W. Keaton, Jr., in Proceedings of the Fourth International Symposium on Polarization Phenomena in Nuclear Reactions, Zürich, 1975 (see [3]), p. 173

[c23] J. R. Shepard and J. J. Kraushaar, University of Colorado NPL Tech. Progress Report, 1976 (unpublished), p. 70

[c24] G. W. Greenlees, G. J. Pyle, and Y. C. Tang, Phys. Rev. 171, 1115 (1968)

[c25] R. P. Goddard and W. Haeberli, Phys. Rev. Lett. 40, 701 (1978)

[c26] T. F. Hill and W. E. Frahn, Ann. Phys. (N.Y.) (to be published)

[c27] G. W. Greenlees, W. Makofske, and G. J. Pyle, Phys. Rev. C 1, 1145 (1970)

[c28] P. E. Hodgson, Nucl. Phys. A150, 1 (1970)

[c29] C. M. Perey and F. G. Perey, At. Data Nucl. Data Tables 17, 1 (1976)

[c30] W. S. McEver et al., Nucl. Phys. A178, 529 (1972) W. E. Burcham et al., ibid. A246, 269 (1975) M. D. Cohler et al., J. Phys. G 2, L151 (1976)

[c31] P. P. Urone et al., Nucl. Phys. A167, 383 (1971)

[c32] S. Mordechai and H. T. Fortune, J. Phys. G 4, L177 (1978)

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Polarized triton elastic scattering at 17 MeV

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