RE: Radioisotope Efficiencies

[Joel Baumbaugh <baumbaug@NOSC.MIL>]

Corey, I'll do it for you.... Here you go RADSAFERS, Thanks to Corey we 

have conformation of many of my LSC efficiencies and a couple of more 

besides...



Joel Baumbaugh (baumbaug@nosc.mil

SSC-SD...



>Joel, will do, as soon as I figure out how, since I just signed up for 

>RADSAFE, this was forwarded to me by someone else.

>Corey

>>Corey, That's great!  Thanks for the additions.  Send this to "everyone" 

>>on the list if you wish (so that they can post it next to their 

>>LSC's)...  Remember I made a mistake on Cr-51 on my original list, it was 

>>really only 35% (I changed mine below)...

>>

>>...jb.

>>

>>At 12:27 PM 2/17/2004 -0800, Singleton, Corey wrote:

>>>Hi Joel,

>>>I have a fax from Packard on April 1, 1998 that lists their 

>>>efficiencies.  I too have searched every book and publication looking 

>>>for this stuff and I can't find the faxed pages in any Packard book.  I 

>>>haven't included my efficiencies for isotopes that are theoretical and 

>>>created by me.  My additions are in a different color and font so 

>>>hopefully you can see them in the list.

>>>

>>>Corey

>>>

>>>Radioisotope:      % Efficiency:

>>>

>>>H-3                     60-65*    *(the range results are from more than 

>>>one test)

>>>C-14                    96

>>>Na-22                   95-100*

>>>NA24                    97

>>>  P-32                   100

>>>P-33                    100

>>>S-35                    95-97*

>>>Cl-36                   100

>>>K40                        96

>>>K42                     96

>>>  Ca-45                  100

>>>Sc-46                   100

>>>Cr-51                   35

>>>CR51                    35

>>>Mg-54                   35

>>>Fe-55                   35

>>>Co-57                   80

>>>CO58                    15

>>>  Fe-59                  100

>>>Co-60                   100

>>>NI63                        85

>>>  Cu-64                  70

>>>Se-75                   40

>>>BR82                        98

>>>KR85                    96

>>>  Ru-86                  100

>>>SR89                    99

>>>SR90                    99

>>>Y90                     99

>>>Sr/Y-90                 100

>>>Tc-99                   100

>>>I-125                   71-78*

>>>I-131                   100

>>>Cs-137                  100

>>>Cs-141                  100

>>>PM147                    97

>>>  Gd-153                 70

>>>Au-195                  70

>>>Bi-207                  60

>>>Bi-210                  100

>>>Pb-210                  100

>>>Po-210                  100

>>>RA222                   300

>>>RA226                   400

>>>Ra-226                  100

>>>U-233                   100

>>>U238                    100

>>>Pu-238                  100

>>>U-238                   100

>>>Pu-239                  100

>>>Am-241                  100

>>>PU241                    100

>>>

>>>

>>>

>>>I "hope" that this will be of some use to many of you.  These will be 

>>>"ballpark" figures for other machines (and scintillation fluids, etc., etc.).

>>>

>>>Now remember, these number are my (and my co-worker/friend's) "best" 

>>>unquenched efficiencies (w/glass vials), AND were done to the best of my 

>>>(our) ability (i.e. I don't do quench/efficiency measurements for a 

>>>living, just an occasional hobby (LOL)).  Some of you, like Franz 

>>>Schoenhofer, are experts in regards to LSC's, and I am NOT!

>>>

>>>

>>>

>>>

>>>

>>>Disclaimer:  While I currently work for the U.S. Government (the Navy), 

>>>my employer would NOT endorse the above statistics. These are my 

>>>results, and mine alone!

>>>I'm just curious what results others of you may have come up with over 

>>>the years (other efficiencies, other radioisotopes),  If you have the 

>>>time, please let me know or the list know (if you're willing to share)...

>>>

>>>Thanks,

>>>

>>>Joel Baumbaugh (baumbaug@nosc.mil)

>>>SSC-SD