[ RadSafe ] Subsurface Gamma Spec Detector

[Doug Aitken]

Brian: could you be a bit more specific as to your needs:
- borehole diameter?
- want are you looking for?

Most commercial GR spectroscopy tools used in (oil-) well logging only attempt to give a T-U-K elemental split, as they use NaI detectors and a multi-window technique,  rather than full spectroscopic measurements. The more sophisticated elemental analysis is usually done in combination with pulsed neutron tools, using neutron-induced gamma (capture and scattering)spectroscopy. But again, the algorithms are generally designed to give an analysis of typical well lithologies.

Therefore you may not find exactly what you need from the majority of well logging tool manufacturers who concentrate on the oil and gas industry needs. The Canberra kit looks interesting. 

Regards
Doug

Doug Aitken
QHSE Advisor, Schlumberger D&M Operations Support
Cell Phone: 713-562-8585
(alternate e-mail: doug.aitken at slb.com )
Mail: c/o Therese Wigzell,
Schlumberger,
Drilling & Measurements HQ,
300 Schlumberger Drive, MD15,
Sugar Land, Texas 77478



-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of 'Dustin G Miller'
Sent: Tuesday, July 19, 2011 10:38 AM
To: 'The International Radiation Protection Mailing List'
Subject: Re: [ RadSafe ] Subsurface Gamma Spec Detector

Thank you for the reply.  I was hoping to find an off the shelf system before contacting Canberra. 

----- Original Message -----
 From:"The International Radiation Protection (Health Physics) Mailing List" 
To:"The International Radiation Protection (Health Physics) Mailing List" 
Cc:
Sent:Tue, 19 Jul 2011 15:00:16 +0000
Subject:Re: [ RadSafe ] Subsurface Gamma Spec Detector

Dustin,

Have you tried Canberra? They produce units and software packages
(ISOCS) which utilize ISOCS to assay activity above ground and within a borehole (try the Marinelli geometry). The ISOCS borehole capability is quite interesting and you can derive activity concentrations for underground volume sources. Try these links:

http://www.canberra.com/literature/973.asp [1]

http://www.canberra.com/products/ [2]

Regards,
John Dixon

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [3] [mailto:radsafe-bounces at health.phys.iit.edu [4]] On Behalf Of Dustin G. Miller
Sent: Monday, July 18, 2011 10:40 PM
To: 'The International Radiation Protection (Health Physics) Mailing List'
Subject: [ RadSafe ] Subsurface Gamma Spec Detector

My internet search skills are failing me today. Does anyone know where to rent or purchase a gamma spec unit with a detector that has dimensions capable of logging a geoprobe boring? I have found the detector in the link below, but I don't know where to purchase and/or rent.

http://www.detectors.saint-gobain.com/SlimLine.aspx [5] 

Thank you,

Dustin G. Miller

RSO/Health Physicist

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Links:
------
[1] http://www.canberra.com/literature/973.asp
[2] http://www.canberra.com/products/
[3] mailto:radsafe-bounces at health.phys.iit.edu
[4] mailto:radsafe-bounces at health.phys.iit.edu
[5] http://www.detectors.saint-gobain.com/SlimLine.aspx
[6] http://health.phys.iit.edu/radsaferules.html
[7] http://health.phys.iit.edu/
[8] http://health.phys.iit.edu/radsaferules.html
[9] http://health.phys.iit.edu/

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