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    User name E. Cisbani

    Log entry time 04:10:04 on December 19,1999

    Entry number 31483

    keyword=Kin 27 (e,e'p) Coincidence Rate approx. 270/h

    3He(e,e'p)X coincidence rate for Kin. 27


    Replayed runs: 1440, 1441, 1443, 1445, 1446, 1447, 1448

    Cuts: `STD' .and. abs(reactez-reacthz).lt.0.04

    Typical spectra shown in figure 1; the bottom histogram is a rebinning of the
    central one where a gaussian+constant fit is also shown

    Average (e,e'p) Coin/hour = 270 +/- 25

    The previous evaluation (36 coin/hour, see entry number 31452) underestimated the real rate for at least 3 reasons:
  • the low statistics of the sample (6 counts)
  • a mistake in the evaluation (the acq. time was 11 min, and only 33% has been replayed)
  • an higher dead time due to the high T3 rate and the low prescale factor which affect by 20% the T5/Q ratio


    • Fig. 2 show the coinc. rate versus the run number


    FIGURE 1

    FIGURE 2