[fluka-discuss]: Cl 39 beta decay

From: Zhu, Guanying <zhu.1475_at_buckeyemail.osu.edu>
Date: Wed, 18 Jan 2017 02:27:24 +0000

Dear fluka users,

I enabled decays in Fluka and recorded the electrons from Cl39 beta decay with mgdraw.f.
As a cross check, I got the branching ratio of each channel with different end-point energy from NNDC (https://www.nndc.bnl.gov/nudat2/dec_searchi.jsp)


Energy
(keV) End-point energy
(keV) Intensity
(%) Dose
( MeV/Bq-s )
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    44.6 16 ? 155 5 0.0019 % 19 8E-7 8
   164.7 20 492 5 0.027 % 4 4.4E-5 7
   211.8 20 612 5 0.580 % 20 0.00123 4
   241.9 21 ? 687 5 0.0014 % 14 3E-6 3
   285.0 21 ? 791 5 6E-4 % 6 1.6E-6 16
   293.1 21 ? 810 5 0.0011 % 11 3E-6 3
   338.7 22 ? 918 5 8E-4 % 8 3E-6 3
   347.4 22 939 5 2.24 % 7 0.00778 25
   356.8 22 ? 961 5 0.0011 % 11 4E-6 4
   377.4 22 ? 1009 5 0.004 % 4 1.5E-5 15
   410.1 22 1084 5 2.55 % 8 0.0105 3
   417.2 22 ? 1100 5 6E-4 % 6 2.3E-6 23
   527.8 23 ? 1349 5 0.006 % 6 3E-5 3
   791.5 24 1924 5 83 % 3 0.657 24
   908.7 24 2175 5 4.5 % 17 0.041 15
  1530.4 24 3442 5 7.1 % 25 0.11 4


and calculated the spectrum analytically.
Please find attached the fluka output and analytical spectrum from my calculation.

From the plot, we see a discrepancy at lower energy end.
It looks like in fluka there is a very high branching ratio of end-point energy, say 0.6MeV, which is not listed on NNDC website.
Does anyone know why the discrepancy exists?



Thank you!
Guanying Zhu











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Received on Wed Jan 18 2017 - 03:27:24 CET

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