Radiation Widths of Bound Nuclear Levels in the Vicinity of the Neutron Threshold

Y. Schlesinger; H. Szichman; G. Ben-David; M. Hass

doi:10.1103/PhysRevC.2.2001

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Radiation Widths of Bound Nuclear Levels in the Vicinity of the Neutron Threshold

Y. Schlesinger^*, H. Szichman, and G. Ben-David^*

M. Hass

Soreq Nuclear Research Centre, Yavne, Israel

Negev Nuclear Research Centre, Negev, Israel

^*Also at Bar-Ilan University, Ramat-Gan, Israel.

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Phys. Rev. C 2, 2001 – Published 1 November, 1970

DOI: https://doi.org/10.1103/PhysRevC.2.2001

Abstract

The radiation widths of bound nuclear levels excited by ( $γ, γ^{'}$ ) reactions in nuclei ${}^{139}{La}$ , ${}^{130}{Te}$ , ${}^{120}{Sn}$ , ${}^{86}{Sr}$ , ${}^{80}{Se}$ , and ${}^{66}{Zn}$ have been measured. The present results together with results published by other authors using ( $γ, γ^{'}$ ) reactions are summarized and compared with similar results obtained in capture reactions of thermal and resonance neutrons. The expected properties of the nuclear levels obtained by extrapolation of the giant-dipole resonance to lower energies are compared with the present experimental data. The fluctuation in partial radiative widths from these bound levels is shown to be compatible with the Porter-Thomas distribution.

References (39)

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[c1] C. S. Young and D. J. Donahue, Phys. Rev. 132, 1724 (1963)

[c2] G. Ben-David and B. Huebschmann, Phys. Letters 3, 87 (1962)

[c3] B. Arad, G. Ben-David, I. Pelah, and Y. Schlesinger, Phys. Rev. 133, 684 (1964)

[c4] G. Ben-David, B. Arad, J. Balderman, and Y. Schlesinger, Phys. Rev. 146, 852 (1966)

[c5] Y. Schlesinger, M. Hass, B. Arad, and G. Ben-David, Phys. Rev. 178, 2013 (1969)

[c6] H. Szichman, Y. Schlesinger, G. Ben-David, and D. Pavel, Nucl. Phys. A148, 369 (1970)

[c7] H. H. Fleischmann, Ann. Physik 12, 133 (1963)

[c8] H. H. Fleischmann and F. W. Stanek, Z. Physik 175, 172 (1963)

[c9] H. H. Fleischmann and F. W. Stanek, Z. Naturforsch 18A, 555 (1963)

[c10] K. Min, Phys. Rev. 152, 1062 (1966)

[c11] G. P. Estes and K. Min, Phys. Rev. 154, 1104 (1967)

[c12] M. Giannini, P. Oliva, D. Prosperi, and S. Sciuti, Nucl. Phys. 65, 344 (1965)

[c13] M. Giannini, P. Oliva, D. Prosperi, and G. Toumbev, Nucl. Phys. A101, 145 (1967)

[c14] S. Ramchandran and J. M. McIntyre, Bull. Am. Phys. Soc. 12, 196 (1967)

[c15] S. Ramchandran and J. M. McIntyre, Phys. Rev. 179, 1153 (1969)

[c16] R. Moreh and A. Nof, Phys. Rev. 178, 1961 (1969)

[c17] N. Shikazono and Y. Kawarasaki, Nucl. Phys. A118, 114 (1968)

[c18] R. Moreh and M. Friedman, Phys. Letters 26B, 579 (1968)

[c19] P. Axel, Phys. Rev. 126, 671 (1962)

[c20] K. Reibel and A. K. Mann, Phys. Rev. 118, 701 (1960)

[c21] E. Hayward and E. G. Fuller, Phys. Rev. 106, 991 (1957)

[c22] C. E. Porter and R. G. Thomas, Phys. Rev. 104, 483 (1956)

[c23] G. A. Bartholomew, Ann. Rev. Nucl. Sci. 11, 259 (1961)

[c24] R. T. Carpenter, Argonne National Laboratory Report No. ANL-6589, 1962 (unpublished)

[c25] L. M. Bollinger, in Proceedings of the International Symposium on Nuclear Structure, Dubna, 1968 (International Atomic Energy Agency, Vienna, Austria, 1969)

[c26] P. Oliva and D. Prosperi, Nuovo Cimento 49, 161 (1967)

[c27] J. E. Lynn, The Theory of Neutron Resonance Reactions (Clarendon Press, Oxford, England, 1968)

[c28] A. G. W. Cameron, Can. J. Phys. 37, 322 (1959) ibid.36, 1040 (1958)

[c29] K. J. Le Couteur and D. W. Lang, Nucl. Phys. 13, 32 (1959)

[c30] J. S. Levinger, Nuclear Photodisintegration (Oxford University Press, London, England, 1960)

[c31] C. Samour, H. E. Jackson, J. Julien, A. Bloch, C. Lopata, and J. Morgenstern, Nucl. Phys. A121, 65 (1968)

[c32] H. Cramer, Mathematical Methods of Statistics (Princeton University Press, Princeton, New Jersey, 1951), p. 241

[c33] Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, edited by M. Abramowitz and I. A. Stegun (U. S. Government Printing Office, Washington, D. C., 1964)

[c34] G. P. Estes and K. Min, private communication

[c35] M. Beer, M. A. Lone, R. E. Chrien, O. A. Wasson, M. R. Bhat, and H. R. Muether, Phys. Rev. Letters 20, 340 (1968)

[c36] L. M. Bollinger, R. E. Coté, R. T. Carpenter, and J. P. Marion, Phys. Rev. 132, 1640 (1963)

[c37] O. A. Wasson, R. E. Chrien, M. A. Lone, M. R. Bhat, and M. Beer, Brookhaven National Laboratory Report No. BNL-13163, 1968 (unpublished)

[c38] M. Beer, R. Graves, O. A. Wasson, M. R. Bhat, S. F. Maghabghab, K. Rimawi, D. I. Garber, and R. E. Chrien, Bull. Am. Phys. Soc. 13, 1421 (1968)

[c39] M. Beer, Brookhaven National Laboratory Report No. BNL-13058 (unpublished)

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Radiation Widths of Bound Nuclear Levels in the Vicinity of the Neutron Threshold

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