1 / 7

Prompt and Delayed Conversion Electron Spectroscopy of Heavy Nuclei

Prompt and Delayed Conversion Electron Spectroscopy of Heavy Nuclei. Andreas Heinz A. W. Wright Nuclear Structure Laboratory Yale University ATLAS Workshop, August 8-9, 2009. Prompt Conversion Electron Spectroscopy. 254 No. R.-D. Herzberg et al., EPJA (2009). 253 No. SACRED.

calix
Download Presentation

Prompt and Delayed Conversion Electron Spectroscopy of Heavy Nuclei

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Prompt and Delayed Conversion Electron Spectroscopy of Heavy Nuclei Andreas Heinz A. W. Wright Nuclear Structure Laboratory Yale University ATLAS Workshop, August 8-9, 2009

  2. Prompt Conversion Electron Spectroscopy 254No R.-D. Herzberg et al., EPJA (2009) 253No SACRED P. A. Butler et al., PRL 89, 202501 (2002)

  3. Solenoids and Mini Oranges ICEBall M.P. Metlay et al., NIM A 336, 162 (1993) → low detection efficiency below 200 keV. → threshold is too high for heavy nuclei. Solenoid spectrometers with superconducting (Super-e, SACRED), and normal-conducting coils (SAGE), as well as with permanent magnet guides exist. J. Andrzejewski et al., NIM A 585, 155 (2008)

  4. Needs for Heavy Nuclei • High detection efficiency also at low energies. • e-gamma, e-e, gamma-gamma correlations; i.e. a spectrometer coupled to GAMMASPHERE/GRETINA. • Channel selection (coupled to FMA) • Usable at high beam currents.

  5. GSI Complex Alpha Decay Spectra 257Rf α ICE Spectra are distorted by summing of alpha and conversion electron signals! But: we get the sum energy of a converted decay cascade! 253No G. D. Jones, NIM A 488, 471 (2002) DSSD α Recoil ICE

  6. Ranges SRIM 25 μm at 50 keV

  7. Needs for Delayed Conversion Electrons • High detection efficiencies and resolution - especially at low electron energies. • Alpha-electron coincidences • Electron-gamma coincidences e spectrometer? 253Fm Catcher (active?) Recoils Ge Degrader (active?) M. Asai et al., PRL 95, 102502 (2005) Ge

More Related