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Ultra-High Resolution γ-Ray Resonance in Zinc-67

Abstract

WE wish to report the observation of nuclear resonance absorption (Mössbauer effect1) of the 93 keV., 9.4 µsec. γ-ray2 of zinc-67. The energy width of this line is 4.84 × 10−11 eV., and the fractional energy resolution, defined as the ratio of twice the natural line width to the γ-ray energy, is 1 part in 1015, and is 103 fold narrower than that reported3 for iron-57. By the same token, the resonance is difficult to observe, because it is easily destroyed by small-amplitude sound vibrations and broadened and weakened by nuclear electric quadruple interactions in the crystals4.

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References

  1. Mössbauer, R. L., Z. Phys., 151, 124 (1958); Naturwiss., 45, 538 (1958); Naturforsch., 14, a, 211 (1959). Craig, Dash, McGuire, Nagle and Reiswig, Phys. Rev. Letters, 3, 221 (1959). Lee, Meyer-Schutzmeister, Schiffer and Vincent, ibid., 3, 223 (1959).

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  2. Strominger, Hollander and Seaborg, Rev. Mod. Phys., 30, 585 (1958).

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  3. Pound, R. V., and Rebka, jun., G. A., Phys. Rev. Letters, 3, 554 (1959). Schiffer, J. P., and Marshall, W., Phys. Rev. Letters, 3, 556 (1959).

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  4. Pound, R. V., Phys. Rev., 79, 685 (1950).

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NAGLE, D., CRAIG, P. & KELLER, W. Ultra-High Resolution γ-Ray Resonance in Zinc-67. Nature 186, 707–708 (1960). https://doi.org/10.1038/186707a0

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