Analysis discussion meeting

Europe/Zurich

Michael:

Potassium analysis:

  • BLR correction method 1 does not impact resolution in  the potassium runs.
  • Gain drift correction on potassium runs --> Order of magnitude increase in stability
  • For natural potassium hydroxide all np-1s lines are visible, and most likely some nd-2p as well. 
  • For implanted 2p-1s and most likely 3p-1s and 4p-1s. 3d-2p not visible at all.
  • Searching for background lines for final recalibration --> Suggestion Frederik: subtract muon data from 1d histogram to get "background" spectrum with much higher statistics. Michael will follow up on this

Window transmission is about 55.11(109)% which is in good agreement to Sami's values.

Studies with pyrolytic graphite: Position of maximal retained fluence predicted well, but value not quite --> Reactions of the top layer potassium with air?

Meeting with iThemba labs: 

  • They seem excited and confident about making the K-40 sample for this year's campaign. 
  • Getting 100µg for nTOF is very unlikely, though potentially 50 could be done (should still be plenty).
  • Possibility of molecular plating after implantation
  • Reactivity of potassium --> Coat with 10 nm graphite

Stella:

Curium analysis:

  • Remaining discrepancy of some hyperfine levels (6 keV in 2p-1s and 12 keV in 3p-1s)
  • Potentially nuclear charge distribution parameter w? --> Stella will follow up on this
  • Potentially octupole deformation --> unlikely
  • Effect on charge radius has been taken into account for the errors, but this would surely help

Katharina:

  • SDD stability: Over 10 days stable within ~1 channel --> excellent
  • resolution: quite typical behavior
  • Energy calibration --> Weird jump at the end of the dynamic range
  • Li 2p-1s is quite off the expected position --> Due to calibration? Katharina will follow up on this

Andreas:

Some interest in muonic x rays of cesium for Bohr-Weisskopf effect

We would mainly gain in statistics and proper analysis of the systematics --> Factor 2-5 improvement probably

If some time during one of the beamtimes, we could measure for a shift or so.

 

Thomas:

Conference in Slovakia (ISTROS): Been asked for a talk on muX but can't go --> Stella might go, we need to check the details

 

There are minutes attached to this event. Show them.
    • 1
      Update
      Speaker: Michael Heines (KU Leuven)