RUNNING THE PROGRAM

To run the program follow these steps:

a) Create the files fj.in and temstep.in 

b) Run the program from the directory where your input files are. 
   NOTE: Sometimes is better to run the program in a less busy machine,
         To do that, first make a rlogin to that machine and change to 
          the directory you are working, then run the program.

c) The program will prompt you to answer some questions, below there
   is an example to illustrate the options you have, the indent (>) text
   is what will appear on your screen. The machine prompt is (radon>) :

>  radon> autoarr
>  This program calculates all the parameters (i.e. E, Do, etc) 
>  necessary to model the 39Ar data.
>  However, If you want to introduce your own parameters enter "y" now, 
>  otherwise type "n" and relax.


   To run the program with the default options type "n" then "Return". 
   If you want change the default options (see below) you should type "y" 
   following by "Return".  

   If you select OPTION  "n". This will appear on your screen:

> n
> all the parameters are set now, relax
> E=    51.900288049895     Ordinate=    5.7314005698331

   Now you can put the program to run in the background as follows:
   Press "Ctrl Z"             'It will stop the program'
   type "bg" then "Return"    'It will start the program in the background'

   NOTE: If you use rlogin to run the program in another machine, running
   it in the background allow you to safely logout and return to your    
   machine.  
   WARNING; if you are running the program foreground, then you CAN NOT 
   EXIT windows nor the shell (logout) until the program finish otherwise
   the process will be killed.


   If you select OPTION  "y". The following prompts will appear:

>  if you still want to use the default value of an specific
>  parameter, type 0 at the prompt:
> type number of max domains, <= 10  (Default is 8)   
> 7


   Enter the maximum  number domains allowed (It must be less
   than 10. Enter 0 to keep the default value (8).

> type number of min domains, > 2        
> 0
   
   Enter the minimum number of domains allowed. It must be 
   larger than 2. Enter 0 to keep the default value (3).


> to keep Do fix type 1, otherwise type 0   
> 1
               '
    Enter 1 for fixing the maximum plateau value of log(r/ro).
    This will speed the program since decrease by one the degree 
    of freedom.  However, some time it is better let the program 
    to adjust this value, specially when a large portion of the 
    39-Ar was degassed at temperatures above the onset of melting. 
    The default "0" will allows it variation during the iteration. 
   (Read also log(r/ro) option below)`

> Type activation energy in kcal/mol, E=        
> 50                       
			   
    You can enter an activation energy which you consider more 
    appropriate that the value obtained by the program (default).
    Enter 0 to keep the value calculate by the program. 
    NOTE: If you choose 0 here the program will skip the next 
          two options.'

> Enter ordinate of log.vs.10000/T plot,    log(Do/ro^2)=
> 5.0  		  
    
    Enter the new origin ordinate (log(Do/ro^2)).
    NOTE: if you enter "0" the program will still use the
    calculate value for the origin ordinate but it will not be 
    appropriate if you have changed the activation energy.
     
> type the max plateau of log(r/ro)
> 1.83

    Enter the max log(r/ro) plateau size.
    NOTE: if you enter "0" the program will use the calculate 
    value from the last value reached in the actual log(r/ro) 
    plot for temperatures below 1150C.  
    It is not really crucial if you have selected '0' on the
    third option above


> all the parameters are set now, relax
> E=    50.000000000000     Ordinate=    5.0000000000000

    Now you can put the program to run in the background. 
   (See OPTION "n" above)