Changes in Version 3.5
======================

Added a Decay Calculation section, and included a Decay Graph.


Changes in Version 3.1
======================

Fixed a bug in the Decay Series window, that caused the wrong decay 
percentages to display from the wrong daughter radionuclide!
The decay probabilities were reversed on the graphic presentation.
Here's an example:   
The main window for Ac-227 states that the daughter Fr-223 decays 
1% of the time, and Th-227 decays 99% of the time.
Yet on the decay series graphic, it shows Ac-227 decaying 99% 
of the time to Fr-223 and 1% of the time to Th-227.  An obvious
reverse of the percentages.
This should now be fixed.

This new version allows for displaying KeV energies as well as
the usual MeV energies.
Use the main menu (O)ptions to select this, or right click the mouse 
button on the energy display window.


Changes in Version 3.0
======================

1. UPDATED DATA FILES

The previous versions of Windows Radiation Decay (Version 1 and 2), 
used the data files that were included with the DOS Radiation Decay 
program "RadDecay.exe" version 2.02.

Windows Radiation Decay Version 3 now uses the data files that are 
included with DOS Radiation Decay program "DK.exe" version 3.05.

The information included in the DOS program "DK.exe" states:
__________________________________________________________________
This constitutes the history of (DOS) RadDecay Version 3 as of this release.
 3.00: Initial release - 4/5/90.
 3.04: New NUCLIDES.REC file with corrected Cu-67 halflife units of hours.
       Prior values were days.  This correction was pointed out by a user
       and verified with D. Kocher.  The reference above is incorrect.
       Old NUCLIDES.REC was dated 1/25/88.  New one is 12/19/90.
3.05:  New NUCLIDES.REC and PHOTONS.REC
         Corrected halflives of:
           Po - 214 from 6.37e-5 sec.    to 1.637e-4 sec.
           Po - 215 from 0.000778 sec.   to 0.001778 sec.
           Pu - 240 from 6537 yrs.       to 6569 yrs.
           Sm - 147 from 6900000000 yrs. to 1.06e11 yrs.
           U  - 236 from 3415000 yrs.    to 2.3415e7 yrs.
         Added Photons to:
           Ag - 110m   Energy: 0.7345    Probability: 0.0091
           In - 114    Energy: 0.5671    Probability: 0.0001
           Nb - 90     Energy: 1.7164    Probability: 0.0052
           Te - 134    Energy: 0.0439    Probability: 0.0013
      Old NUCLIDES.REC was dated 12/19/90.  New one is 5/3/91.
      Old PHOTONS.REC  was dated 4/13/87.   New one is 5/3/91.
__________________________________________________________________

These above changes have been checked against ICRP-38, "Radionuclide 
Transformations" and have been found to be correct.

What changes (if any) were made to the data files between the DOS 
Version 2.02 and DOS Version 3.0 is unknown.

(The updated data files, and checking, is thanks to Ken Sejkora)

NOTE:
A newer DOS version exists, called RADDECAY 4.02, "DK4.EXE" 
(According to http://www-rsicc.ornl.gov/codes/dlc/dlc1/dlc-134.html)
I was informed that it was available for purchasing over the internet.
I was NOT inclined to purchase it!


3. PARENT NUCLIDE

On the main display, possible parents of the current nuclide are displayed.  
The percentage that the parent decays to the current nuclide is also displayed.
(Mouse clicking on the parent nuclide, will display that nuclides data.
Also, mouse clicking on a daughter nuclide, will display that nuclides data).


2.  SORT ON PROBABILITIES OR ENERGY

When the display of the Probabilities and Energy of emission products are 
opened, it is sorted on Probabilities or Energy, depending on the menu option 
settings on the start-up window.
This option can be modified in the display listing, by right clicking the mouse 
on the list.
(Sorting is still only from minimum to maximum, {the Delphi listbox only allowed 
ascending order sort} )


3.  SPECTRUM SEARCHING

It is now possible to search for Alpha, Electron, Beta and Positrons emissions, 
for specific energy emissions.
Previously only Photon Emission search was possible.
(Since Beta and Positrons have a range of energies, [Average and Maximum], the 
searching of these emissions requires the energy type to be specified).

A probability limit is now included in the spectrum search.
This probability limit allows the spectrum yield to discriminate out low 
probability energy lines.
 

4.  HELP INFORMATION ON DATA UPDATES

Particular literature publications have experimentally determined variations to 
currently published Radionuclide data.
The data (*.REC) files were NOT updated with this new information.
Instead a note button was included, to list the variations to current published 
data.
(Try the Nuclide Si-32 for an example).


5.  SAVING THE RECORD FILES AS TEXT

A menu selection is provided to save the data files (*.rec) to text files (*.txt).
(Under File - Create Text Data Base Files).  
The record files are written to disk files.  The resulting files can be imported 
into spreadsheets, data base, or word processors.
This function was provided by the DOS Raddecay program Version 3.05 (DK.exe), and 
was thus incorporated in this windows version.


6.  BUG FIXES

Some minor bug fixes made.  No recordings were made of what they were.



NOTE:  Y2K COMPLIANT

Is the program Year 2000 compliant?  I don't know, I don't care!
(It will most likely work as normal in the year 2000!)
I think the Y2K bug, is mostly hype.  (At least for the WinTel programs).
Besides, I really wonder if major difficulties will occur if a non-essential 
WinTel program states that it is 1/1/1900 on the 1/1/2000!
[That is my opinion, and I do not want to hear more stories like how many 
hundreds of thousands will it cost to update the Air-conditioner program and the 
Student data base programs :) ]
