icon Kapiti gaigakaunta

icon Am241 v2.0

28 April 2011
background
This is 37kBq (1µCi) 5.5mm in front of the sensor. Note that the x axis is considerably extended and that the activity is quite high.
background
37kBq at 25mm
background
37kBq at 37.5mm
background
37kBq at 50mm
background
37kBq at 100mm
background
37kBq at 150mm
background
That's normal background against the same horizontal scale. Vertical is lots less, notice that this curve is lost in the baseline noise of the Am241 spectrum.
We seem to have a saturation problem. Time to look at the electronics again.

icon index

icontwin peaks - highest levels yet
2 Dec 2012
iconlatest - most recent data here
22Aug2017 11:31
iconreview - up to date
26 May 2012
iconAm241 v2.0 - smoke alarm redux: hot
28 April 2011
iconAm241 - smoke alarm false start
22 April 2011
iconbias - increased voltage from 478 to 725V
21 April 2011
iconprejudice - snapshot of record before voltage increase
21 April 2011
iconperspective - tritium in local waterways
21 April 2011
iconspectra - gallery of spectra 30Mar-17Apr
17 April 2011
iconfall - southerlies eat radiation
5 April 2011
icontop model - Norwegian atmospheric projector
5 April 2011
iconrain - it's hot up north
27 March 2011
iconbulk bins - fiddling with PRA
25 March 2011
iconlinks
24 March 2011
iconproduction - just another plot of background
24 March 2011
icondimension++ - first 10½ hour run
23 March 2011
iconforth - a better regulator, discovering PRA
22 March 2011
iconthe third day - looking at pulses
21 March 2011
icontutu - rock is cold
20 March 2011
iconguff - te ahi kaa
19 March 2011