HAL : in2p3-00275392, version 1

DOI : 10.1016/j.nima.2008.02.044

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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 589 (2008) 230-242

Internal conversion and summing effects in heavy-nuclei spectroscopy

Ch. Theisen1, A. Lopez-Martens2, Ch. Bonnelle3

(2008)

Internal conversion of low-energy nuclear transitions occurs with a high probability in heavy nuclei. After the emission of the conversion electron, a cascade of X-rays, Auger or Coster–Krönig electrons takes place. In $\alpha$-decay experiments in which the nuclei of interest are implanted into a silicon detector, these atomic processes contribute to the detected energy. To understand the distortions of $\alpha$-particle energy spectra, knowledge of the various atomic yields is required. Using state-of-the-art calculations, new atomic yields are computed in $_99$Es and compared to those available in the literature. Detailed simulations of the $^{251}_{101}$Md $\alpha$ decay are performed and compared to experimental data. Possible ways to discriminate between the available atomic yields are also discussed.

1 :	IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
2 :	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
3 :	LCP-MR - Laboratoire de chimie physique-matière et rayonnement

Thème(s)

:

Physique/Physique Nucléaire Expérimentale

Mot(s)-clé(s) : Internal conversion and extranuclear effects – Fluorescence – Auger effect – alpha decay

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Contributeur : Michel Lion <>

Déposé pour le compte de : Christophe Theisen <>

Soumis le : Mardi 19 Août 2008, 09:53:58

Dernière modification le : Mardi 19 Août 2008, 10:28:22