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Half-lives of levels in99Nb and99Mo

  • Nuclei
  • Published:
Zeitschrift für Physik A Atoms and Nuclei

Abstract

The half-lives of the 469-keV level in99Nb and the 236-keV state in99Mo have been determined to (0.21±0.06) ns and (0.87±0.15) ns, respectively, fromβ,γ-delayed coincidences. Values ofB(E2)=(89±28)e 2 fm4 andB(M1)=(0.017±0.003) μ 2 n are deduced for the 469-keV transition in99Nb and the 138-keV transition in99Mo. The result for theE2-transition probability seems to be in accordance with the particle-core coupling interpretation of the low-lying levels in98Nb if98Zr is used as the core. TheM1 probability for99Mo agrees with the systematics for “l-forbidden” 1g7/2→2d 5/2 neutron transitions.

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Author notes

  1. G. Battistuzzi

    Present address: Seminario Vesc., I-35100, Padova, Italy

Authors and Affiliations

  1. Institut für Kernphysik, Kernforschungsanlage Jülich, Federal Republic of Germany

    G. Battistuzzi, K. Kawade, H. Lawin, K. Shizuma & K. Sistemich

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  1. G. Battistuzzi
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  2. K. Kawade
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  3. H. Lawin
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  4. K. Shizuma
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  5. K. Sistemich
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Additional information

During the measurements on leave from Nagoya University, Japan

On leave of absence from Hiroshima University, Japan

The authors acknowledge with pleasure fruitful discussions with Profs. K. Heyde, L.K. Peker and O.W.B. Schult.

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Battistuzzi, G., Kawade, K., Lawin, H. et al. Half-lives of levels in99Nb and99Mo. Z Physik A 306, 113–116 (1982). https://doi.org/10.1007/BF01415480

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  • DOI: https://doi.org/10.1007/BF01415480

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