Deformation effect in the fast neutron total cross section of aligned <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Co</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>59</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>

U. Fasoli; P. Pavan; D. Toniolo; G. Zago; R. Zannoni; G. Galeazzi

doi:10.1103/PhysRevC.27.2003

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Deformation effect in the fast neutron total cross section of aligned ${}^{59}{Co}$

U. Fasoli, P. Pavan, D. Toniolo, G. Zago, and R. Zannoni

G. Galeazzi

Istituto di Fisica dell'Università degli Studi, 35100 Padova, Italy and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, 35020 Legnaro, Italy

Istituto Nazionale di Fisica Nucleare, Laboratori di Legnaro, 35100 Padova, Italy

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Phys. Rev. C 27, 2003 – Published 1 May, 1983

DOI: https://doi.org/10.1103/PhysRevC.27.2003

Abstract

The variation of the total neutron cross section, $Δ σ_{align}$ , on ${}^{59}{Co}$ due to nuclear alignment of the target has been measured over the energy range from 0.8 to 20 MeV employing a cobalt single crystal with a 34% nuclear alignment. The results show that $Δ σ_{align}$ oscillates from a minimum of -5% at about 2.5 MeV to a maximum of + 1% at about 10 MeV. The data were successfully fitted by optical model coupled-channel calculations. The coupling terms were deduced from a model representing the ${}^{59}{Co}$ nucleus as a vibrational ${}^{60}{Ni}$ core coupled to a proton hole in a ( $1 f_{\frac{7}{2}}$ ) shell, without free parameters. The optical model parameters were determined by fitting the total cross section, which was independently measured. The theoretical calculations show that, at lower energies, $Δ σ_{align}$ depends appreciably on the coupling with the low-lying levels.

NUCLEAR REACTIONS ${}^{59}{\vec{Co}} + n$ , $E_{n} = 0.8 - 20$ MeV; measured $σ_{T}$ and deformation effect $Δ σ_{align}$ ; data analyzed by coupled-channel calculations; deduced optical model parameters; no free parameters used in coupling terms.

References (47)

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H. Marshak, A. C. B. Richardson, and T. Tamura, Phys. Rev. 150, 996 (1966)
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U. Fasoli, G. Galeazzi, D. Toniolo, and G. Zago, Lett. Nuovo Cimento 6, 485 (1973)
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Omitted endnote
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A. Covello and V. R. Manfredi, Boll. Soc. Ital. Fis. 79, 90 (1970)
R. L. Auble, Nucl. Data Sheets 28, 103 (1979)
G. Bruge, J. C. Faivre, H. Faraggi, and A. Bussiere, Nucl. Phys. A146, 597 (1970)
K. Bleuler, M. Beiner, and R. de Tourreil, Nuovo Cimento 52B, 45 (1967)
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A. Bohr and B. R. Mottelson, Nuclear Structure (Benjamin, Reading, Mass., 1969), Vol 1
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T. R. Fisher, H. A. Grench, D. C. Healey, J. S. McCarthy, D. Parks, and R. Whitney, Nucl. Phys. A179, 241 (1973)
E. Ramström and P. Å. Göransson, Nucl. Phys. A284, 461 (1977)
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J. C. Ferrer, J. D. Carlson, and J. Rapaport, Nucl. Phys. A275, 325 (1977)

[c1] R. Wagner, P. D. Miller, T. Tamura, and H. Marshak, Phys. Rev. 139, 29 (1965)

[c2] H. Marshak, A. C. B. Richardson, and T. Tamura, Phys. Rev. 150, 996 (1966)

[c3] T. R. Fisher, R. S. Safrata, E. G. Shelley, J. McCarthy, S. M. Austin, and R. C. Barrett, Phys. Rev. 157, 1149 (1967)

[c4] J. S. McCarthy, T. R. Fisher, E. G. Shelley, R. S. Safrata, and D. Healey, Phys. Rev. Lett. 20, 502 (1968)

[c5] H. Marshak, A. Langsford, C. Y. Wong, and T. Tamura, Phys. Rev. Lett. 20, 554 (1968) H. Marshak, A. Langsford, T. Tamura, and C. Y. Wong, Phys. Rev. C 2, 1862 (1970)

[c6] U. Fasoli, G. Galeazzi, D. Toniolo, and G. Zago, Lett. Nuovo Cimento 6, 485 (1973)

[c7] R. S. Safrata, J. S. McCarthy, W. A. Little, M. R. Yearian, and R. Hofstadter, Phys. Rev. Lett. 18, 667 (1967) F. J. Uhrhane, J. S. McCarthy, and M. R. Yearian, ibid. 26, 578 (1971)

[c8] T. R. Fisher, S. L. Tabor, and B. A. Watson, Phys. Rev. Lett 27, 1078 (1971)

[c9] D. R. Parks, S. L. Tabor, B. B. Triplett, H. T. King, T. R. Fisher, and B. A. Watson, Phys. Rev. Lett. 29, 1264 (1972)

[c10] U. Fasoli, G. Galeazzi, D. Toniolo, G. Zago, and R. Zannoni, Nucl. Phys. A284, 282 (1977)

[c11] J. M. Peterson, Phys. Rev. 125, 955 (1962)

[c12] T. R. Fisher, A. R. Poletti, and B. A. Watson, Phys. Rev. C 8, 1837 (1973)

[c13] U. Fasoli, G. Galeazzi, P. Pavan, D. Toniolo, G. Zago, and R. Zannoni, Lett. Nuovo Cimento 27, 207 (1980)

[c14] D. von Ehrenstein, Ann. Phys. (Leipzig) 7, 342 (1961)

[c15] W. J. Childs and L. S. Goodman, Phys. Rev. 170, 50 (1968)

[c16] K. Murakawa, J. Phys. Soc. Jpn. 27, 1690 (1969)

[c17] S. C. Fultz, R. L. Bramblett, J. T. Caldwell, N. E. Hansen, and C. P. Jupiter, Phys. Rev. 128, 2345 (1962)

[c18] G. Baciu, G. C. Bonazzola, B. Minetti, C. Molino, L. Pasqualini, and G. Piragino, Nucl. Phys. 67, 178 (1965)

[c19] R. A. Alvarez, B. L. Berman, D. D. Faul, F. H. Lewis, Jr., and P. Meyer, Phys. Rev. C 20, 128 (1979)

[c20] K. T. R. Davies, G. R. Satchler, R. M. Drisko, and R. H. Bassel, Nucl. Phys. 44, 607 (1963)

[c21] L. Satpathy and S. C. Gujrathi, Nucl. Phys. A110, 400 (1968)

[c22] A. Covello and V. R. Manfredi, Phys. Lett. 34B, 584 (1971)

[c23] M. Montagna, Thesis, University of Padua, 1971 (unpublished)

[c24] K. W. Stewart, B. Castel, and B. P. Singh, Phys. Rev. C 4, 2131 (1971)

[c25] J. M. G. Gomez, Phys. Rev. C 6, 149 (1972)

[c26] J. L. C. Ford, Jr., C. Y. Wong, T. Tamura, R. L. Robinson, and P. H. Stelson, Phys. Rev. 158, 1194 (1967)

[c27] T. Tamura, Rev. Mod. Phys. 37, 679 (1965)

[c28] A. Buscemi, M. De Poli, C. Rossi Alvarez, and R. Zanon, in Proceedings of the 1st European HP-1000 User Conference, 1981, edited by M. Beekman, A Van Putten, and P. Zuidema (Reedbooks, Chertsey, Surrey, England, 1981)

[c29] M. A. Grace, C. E. Johnson, N. Kurti, R. G. Scurlock, and R. T. Taylor, Philos. Mag. 4, 948 (1959)

[c30] U. Fasoli and P. Pavan, Istituto Nazionale di Física Nucleare Report INFN/TC-80/1, 1980 (unpublished)

[c31] U. Fasoli, G. Galeazzi, and D. Toniolo, in Progress in Refrigeration Science and Technology, Proceedings of the XVth International Congress of Refrigeration, (1979), edited by the Organizing and Scientific Committee of XVth International Congress of Refrigeration (The International Institute of Refrigeration, Paris, 1980), Vol. 1, p. 101

[c32] Omitted endnote

[c33] O. V. Lounasmaa, Experimental Principles and Methods below 1 K (Academic, New York/London, 1974)

[c34] D. A. Shirley, in Hyperfine Structure and Nuclear Radiation, edited by E. Matthias and D. A. Shirley (North-Holland, Amsterdam, 1968), p. 985

[c35] S. Cierjacks, P. Forti, D. Kopsch, L. Kropp, J. Nebe, and H. Unseld, Kernforschungszentrum Report 1000, 1969, Suppl. 2. (unpublished)

[c36] M. D. Goldberg, S. F. Mughabghab, B. A. Magurno, and V. M. May, Brookhaven National Laboratory Report BNL 325, 1966 (unpublished)

[c37] A. Covello and V. R. Manfredi, Boll. Soc. Ital. Fis. 79, 90 (1970)

[c38] R. L. Auble, Nucl. Data Sheets 28, 103 (1979)

[c39] G. Bruge, J. C. Faivre, H. Faraggi, and A. Bussiere, Nucl. Phys. A146, 597 (1970)

[c40] K. Bleuler, M. Beiner, and R. de Tourreil, Nuovo Cimento 52B, 45 (1967)

[c41] H. J. Kim, Nucl. Data Sheets 17, 485 (1976)

[c42] A. Bohr and B. R. Mottelson, Nuclear Structure (Benjamin, Reading, Mass., 1969), Vol 1

[c43] A. Bohr and B. R. Mottelson, Nuclear Structure (Benjamin, Reading, Mass., 1975), Vol. 2

[c44] T. R. Fisher, H. A. Grench, D. C. Healey, J. S. McCarthy, D. Parks, and R. Whitney, Nucl. Phys. A179, 241 (1973)

[c45] E. Ramström and P. Å. Göransson, Nucl. Phys. A284, 461 (1977)

[c46] D. E. Velkley, D. W. Glasgow, J. D. Brandenberger, M. T. McEllistrem, J. C. Manthuruthil, and G. P. Poirier, Phys. Rev. C 9, 2181 (1974)

[c47] J. C. Ferrer, J. D. Carlson, and J. Rapaport, Nucl. Phys. A275, 325 (1977)

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Deformation effect in the fast neutron total cross section of aligned ${}^{59}{Co}$

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References (47)

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Deformation effect in the fast neutron total cross section of aligned Co59

Abstract

References (47)

Deformation effect in the fast neutron total cross section of aligned ${}^{59}{Co}$