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Low temperature nuclear orientation of239Np in gadolinium host

  • Hyperfine Interactions in Atomic and Nuclear Physics
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Abstract

The angular distribution of γ-radiation from the decay of239Np oriented at low temperatures in gadolinium host was investigated. The orientation parameters B2 and B4 were determined. The attenuation factors for two long-living states in239Pu at 391.5 keV and 285.4 keV were calculated. From the anisotropies measured the multipole mixing ratios for 11 gamma-transitions in239Pu were deduced. The results obtained support the assignment of spins of the levels at 492.2 keV and 391.6 keV as 3/2− and 7/2−, respectively.

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Author notes

  1. P. Malinský

    Present address: Central Microtrone Lab., Technical University, Břehová 7, CS-115 19, Prague 1, Czechoslovakia

Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Head Post Office Box 79, 101 000, Moscow, USSR

    E. Šimečková, P. Čižek, M. Finger, J. John, P. Malinský & V. N. Pavlov

Authors
  1. E. Šimečková
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  2. P. Čižek
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  3. M. Finger
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  4. J. John
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  5. P. Malinský
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  6. V. N. Pavlov
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Šimečková, E., Čižek, P., Finger, M. et al. Low temperature nuclear orientation of239Np in gadolinium host. Hyperfine Interact 59, 185–188 (1990). https://doi.org/10.1007/BF02401220

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