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Beta-neutrino angular correlation in the decay of 14O

Scalar coupling and interatomic interaction

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Abstract:

The positrons and coincident gamma-rays following the pure Fermi 0+ → 0+ branch of β+-decay in 14O were measured. The Doppler shift of the γ-quantum observed is sensitive to the beta-neutrino correlation coefficient, which is unity (α = 1) in the absence of scalar coupling. The interatomic interaction of recoiling daughters was noticed, which has prevented to obtain an improved result for scalar coupling despite of the excellent statistical accuracy of the measurement. At the same time, it was shown that the method described can be used as a very sensitive and flexible tool to probe the interatomic interactions in matter at the hundred eV energy level. Perspectives in this direction as well as the future angular-correlation experiments aimed to search for scalar coupling in beta-decay are discussed.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, 141980 Dubna, Russia, , , , , , RU

    V. Brudanin, V. Egorov, Yu. Shitov, Ts. Vylov, I. Yutlandov & Sh. Zaparov

  2. Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium, , , , , , BE

    J. Deutsch, R. Prieels, N. Severijns & Ch. Vieu

  3. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, 91405 Orsay, France, , , , , , FR

    Ch. Briançon

  4. Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic, , , , , , CZ

    V. Vorobel

Authors
  1. V. Vorobel
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  2. Ch. Briançon
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  3. V. Brudanin
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  4. V. Egorov
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  5. J. Deutsch
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  6. R. Prieels
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  7. N. Severijns
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  8. Yu. Shitov
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  9. Ch. Vieu
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  10. Ts. Vylov
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  11. I. Yutlandov
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  12. Sh. Zaparov
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Additional information

Received: 21 May 2002 / Accepted: 22 August 2002 / Published online: 17 January 2003

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ID="a"e-mail: vorobel@ipnp.troja.mff.cuni.cz

Communicated by J. Äystö

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Vorobel, V., Briançon, C., Brudanin, V. et al. Beta-neutrino angular correlation in the decay of 14O . Eur Phys J A 16, 139–147 (2003). https://doi.org/10.1140/epja/i2002-10067-y

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  • DOI: https://doi.org/10.1140/epja/i2002-10067-y

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