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Technical Discussions
Pengzhu Wang
Pengzhu Wang
06:51 Nov-14-2008
Maximum penetration of Ir-192 in steel

Hi,
We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
(1) Is Ir-192 OK for this application?
(2) Does the decay influence the maximum penetration thickness?
Many thanks,
Pengzhu



    
 
 Reply 
 
tj
tj
07:11 Nov-14-2008
Re: Maximum penetration of Ir-192 in steel
----------- Start Original Message -----------
: Hi,
: We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
: (1) Is Ir-192 OK for this application?
: (2) Does the decay influence the maximum penetration thickness?
: Many thanks,
: Pengzhu
------------ End Original Message ------------

This would be working at the upper practical limit of Ir192. The energy levels would remain the same with decay. However, with loss of activity comes increased shot time and at 3in. of steel it would be impractical for normal use. Better to use higher energy x-ray or cobalt60 gamma.


    
 
 Reply 
 
Juan Amado
Engineering, Inspection
Arco Industrial, S.A., Panama, Joined Nov 2001, 44

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
09:53 Nov-14-2008
Re: Maximum penetration of Ir-192 in steel
----------- Start Original Message -----------
: : Hi,
: : We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
: : (1) Is Ir-192 OK for this application?
: : (2) Does the decay influence the maximum penetration thickness?
: : Many thanks,
: : Pengzhu
: This would be working at the upper practical limit of Ir192. The energy levels would remain the same with decay. However, with loss of activity comes increased shot time and at 3in. of steel it would be impractical for normal use. Better to use higher energy x-ray or cobalt60 gamma.
------------ End Original Message ------------


If 95mm is the maximum thickness, but you have thinner sections, you could probably gain valuable information about the part using Ir192, however, if you are looking to get a good density reading at the thickest portion of the casting you probably will not get it with this source.
Hope this helps, regards,
Juan Amado



    
 
 Reply 
 
Peter Alfers
Peter Alfers
09:53 Nov-16-2008
Re: Maximum penetration of Ir-192 in steel
you can use Ir 192 in conjunction with two Films how will
exposure at once. Than you need the half time for your right density .For the interpretation use the films lying upon each other.


    
 
 Reply 
 

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