Isomer Ratios in <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>58</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> from the Photonuclear Reactions (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>γ</mi><mo>,</mo><mi> </mi><mi>n</mi></math>) and (<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>γ</mi><mo>,</mo><mi> </mi><mi>np</mi></math>)

Clifford E. Rhoades, Jr; H. A. Medicus

doi:10.1103/PhysRev.167.1049

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Isomer Ratios in ${}^{58}{Co}$ from the Photonuclear Reactions ( $γ, n$ ) and ( $γ, np$ )

Clifford E. Rhoades, Jr.^* and H. A. Medicus^†

Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181

^*National Science Foundation Undergraduate Research Participant. Present address: Palmer Physical Laboratory, Princeton University, Princeton, N. J. 08540.
^†On leave from September 1967 to September 1968 at AERE, Nuclear Physics Division, Harwell, Didcot, Berkshire, England.

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Phys. Rev. 167, 1049 – Published 20 March, 1968

DOI: https://doi.org/10.1103/PhysRev.167.1049

Abstract

Isomer ratios in ${}^{58}{Co}$ have been measured for the photonuclear reactions ${}^{59}{Co} (γ, n) {}^{58}{Co}$ and ${}^{60}{Ni} (γ, n p) {}^{58}{Co}$ . Their values [(ground-state yield)/(total yield)] are 0.43±0.03 and 0.68±0.03, respectively. Using the Huizenga-Vandenbosch formalism, a spin cutoff parameter $σ = 4.4 \pm 0.6$ can be deduced if it is assumed that all the outgoing nucleons are evaporated. If direct processes are included, the spin cutoff parameter determined from the ( $γ, n$ ) reaction will remain unchanged, whereas the one determined from the ( $γ, np$ ) reaction will increase somewhat.

References (21)

J. R. Huizenga and R. Vandenbosch, Phys. Rev. 120, 1305 (1960)
C. Bloch, Phys. Rev. 93, 1094 (1954)
R. Vandenbosch and J. R. Huizenga, Phys. Rev. 120, 1313 (1960)
C. Bishop, J. R. Huizenga, and J. P. Hummel, Phys. Rev. 135, B401 (1964)
C. Riley, K. Ueno, and B. Linder, Phys. Rev. 135, B1340 (1964)
J. R. Tatarczuk and H. A. Medicus, Phys. Rev. 143, 818 (1966)
J. H. Carver, G. E. Cotte, and T. R. Sherwood, Nucl. Phys. 37, 449 (1962)
P. Decowski, W. Grochulsi, A. Marcinkowski, K. Siwek, I. Sledzinska, and Z. Whilhelmi, Nucl. Phys. (to be published)
H. Lichtblau and A. Goldmann, Z. Physik 205, 47 (1967)
D. Christian and D. S. Martin, Jr., Iowa State College Report No. ISC-197, 1951 (unpublished)
E. Weigold and R. N. Glover, Nucl. Phys. 32, 106 (1962)
A. Paulsen, Z. Physik 205, 226 (1967)
N. D. Dudey and T. T. Sugihara, Phys. Rev. 139, B896 (1965) R. Vandenbosch, L. Haskin, and J. C. Norman, ibid. 137, B1134 (1965)
W. L. Hafner, Jr., J. R. Huizenga, and J. R. Vandenbosch, Argonne National Laboratory Report No. ANL-6662, 1962 (unpublished)
Nuclear Data Sheets compiled by K. Way et al. (U. S. Government Printing Office, National Academy of Sciences—National Research Council, Washington 25, D. C., 1960), NRC 60-5-12
S. Malmskog, Nucl. Phys. 51, 690 (1964)
D. B. Beard and A. McLellan, Phys. Rev. 140, B888 (1965)
J. L. Need, Phys. Rev. 129, 1302 (1963)
P. A. Moldauer, Argonne National Laboratory Report No. ANL-6323, 1961 (unpublished)
S. C. Fultz, R. L. Bramblett, J. T. Caldwell, N. E. Nansen, and C. P. Jupiter, Phys. Rev. 128, 2345 (1962)
J. H. Carver and W. Turchinetz, Proc. Phys. Soc. (London) 73, 585 (1959)

[c1] J. R. Huizenga and R. Vandenbosch, Phys. Rev. 120, 1305 (1960)

[c2] C. Bloch, Phys. Rev. 93, 1094 (1954)

[c3] R. Vandenbosch and J. R. Huizenga, Phys. Rev. 120, 1313 (1960)

[c4] C. Bishop, J. R. Huizenga, and J. P. Hummel, Phys. Rev. 135, B401 (1964)

[c5] C. Riley, K. Ueno, and B. Linder, Phys. Rev. 135, B1340 (1964)

[c6] J. R. Tatarczuk and H. A. Medicus, Phys. Rev. 143, 818 (1966)

[c7] J. H. Carver, G. E. Cotte, and T. R. Sherwood, Nucl. Phys. 37, 449 (1962)

[c8] P. Decowski, W. Grochulsi, A. Marcinkowski, K. Siwek, I. Sledzinska, and Z. Whilhelmi, Nucl. Phys. (to be published)

[c9] H. Lichtblau and A. Goldmann, Z. Physik 205, 47 (1967)

[c10] D. Christian and D. S. Martin, Jr., Iowa State College Report No. ISC-197, 1951 (unpublished)

[c11] E. Weigold and R. N. Glover, Nucl. Phys. 32, 106 (1962)

[c12] A. Paulsen, Z. Physik 205, 226 (1967)

[c13] N. D. Dudey and T. T. Sugihara, Phys. Rev. 139, B896 (1965) R. Vandenbosch, L. Haskin, and J. C. Norman, ibid. 137, B1134 (1965)

[c14] W. L. Hafner, Jr., J. R. Huizenga, and J. R. Vandenbosch, Argonne National Laboratory Report No. ANL-6662, 1962 (unpublished)

[c15] Nuclear Data Sheets compiled by K. Way et al. (U. S. Government Printing Office, National Academy of Sciences—National Research Council, Washington 25, D. C., 1960), NRC 60-5-12

[c16] S. Malmskog, Nucl. Phys. 51, 690 (1964)

[c17] D. B. Beard and A. McLellan, Phys. Rev. 140, B888 (1965)

[c18] J. L. Need, Phys. Rev. 129, 1302 (1963)

[c19] P. A. Moldauer, Argonne National Laboratory Report No. ANL-6323, 1961 (unpublished)

[c20] S. C. Fultz, R. L. Bramblett, J. T. Caldwell, N. E. Nansen, and C. P. Jupiter, Phys. Rev. 128, 2345 (1962)

[c21] J. H. Carver and W. Turchinetz, Proc. Phys. Soc. (London) 73, 585 (1959)

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Isomer Ratios in ${}^{58}{Co}$ from the Photonuclear Reactions ( $γ, n$ ) and ( $γ, np$ )

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Isomer Ratios in Co58 from the Photonuclear Reactions (γ, n) and (γ, np)

Abstract

References (21)

Isomer Ratios in ${}^{58}{Co}$ from the Photonuclear Reactions ( $γ, n$ ) and ( $γ, np$ )