DRAGON MEETING  TUESDAY JAN 24   2PM    
Present: dfot, dh, cd, pm, ah, jc, gr, jp, cv, mt, cr, mmp (recorder)


1. Last week's minutes accepted

2.  alpha acceptance tests
   * DFOT says that source is at target centre to 1/4 mm (!)
   * detector works fine
   * high vacuum is available
   * rough acceptance of 19mr straight down the beam tube
   * detectors now moved to downstream of charge slits
     -  looks OK in y direction
     -  tail on high momentum side
     -  spot seems to be _roughly_ 1cm wide
     -  plan to take data here and do some playing with magnets, slits
        > spend a week at that position before moving on
        
        
3.  Status of 26Al   (cr)

   *  charge state fraction taken to be a constant as f(pressure) [fig]
     -  uncertainty now a little larger, but not severe  [fig]
     -  as a result, resonance strengths are now consistent [fig]
   *  Vogellar branching ratios put into GEANT and BGO distributions generated
     - not much 197 g0-vs-g1 data , but what is there is not surprising [fig]
     -  in constrast, 201 data shows some surprising bumps  [fig]
        > seem to be 'real'
        > some options considered and put into GEANT, but no exact match seen
          o   still a mystery
     -  simulation indicates that BR uncertainty doesn't affect much the
        uncertainty in BGO efficiency
     - difference with Vogelaar is so big it doesn't seem possible that it is
        simply gamma efficiency
   *  awaiting DRAGON acceptance results as well
   *  have been in communication with Jordi Jose about possible revision of
        calculated rates in novae   
   *  summary: we have a different resonance strength, energy, and branching
      -  time to put it all together and get a draft letter
      
      [N.B.  all figures will be on the ELOG]
      
4.  coming events and deadlines
   *  NIC abstract deadline is end of January
   *  Annual Report deadline Jan 27
   *  abstracts to CAP  by March 1

5.  22Na decay experiment
   *  Claus Rolfs quoted as saying that 22Na decay rate will increase by 
        1.4x  if cooled to 10K in metals; 1/sqrt(T) temperature dependence
      - seems unlikely > inappropriate extrapolation of model
   *  TRIUMF test safety approval by JMP
      -  22Na created by bombarding 27Al with 70 MeV protons
        > other junk decays away quickly (bombardement was 2-3 years ago)
      - sample now cooling down to liquid nitrogen temperature
        >  if Rolfs' model is correct, should see a 10% effect
      - HPGe crystal used   ~8 event/sec   rate
   
meeting adjourned 2:55