RE: A hunting we will go!

["Clement, Christopher" <clementc@aecl.ca>]

With respect to finding your thorium hot spot, you might be able to
estimate it's depth by looking at the relative observed "strength" of
two or more peaks in your spectra.  Our office is studying similar
techniques to be applied to radium sources.  Let me know if you would
like more information.

------------------------------------------------------------
Christopher H. Clement
Scientific Specialist / Radiation Protection Program Manager
Low-Level Radioactive Waste Management Office
Atomic Energy of Canada Limited
clementc@aecl.ca


> ----------
> From: 	Greg Gibbons[SMTP:gibbgreg@isu.edu]
> Sent: 	April 30, 1998 1:47 PM
> To: 	Multiple recipients of list
> Subject: 	RE: A hunting we will go!
> 
> 
> ------ =_NextPart_000_01BD742D.3E4E2160
> Content-Type: text/plain; charset="us-ascii"
> Content-Transfer-Encoding: quoted-printable
> 
> David,
> I was sharing your message with Tom Gesell here at ISU, and he
> suggested =
> perhaps you could try looking for the 2.6 MeV gamma associated with =
> Tl-208 (appears later in the same decay chain) as well; depending on
> the =
> instrumentation you plan to use, of course.
> 
> Greg Gibbons (gibbgreg@isu.edu)
> 
> ----------
> From: 	David Levy[SMTP:david.levy@fernald.gov]
> Sent: 	Thursday, April 30, 1998 11:25 AM
> To: 	Multiple recipients of list
> Subject: 	A hunting we will go!
> 
>      Folks,
>     =20
>      For the sake of an excavation/remediation project, we are
> assuming=20
>      that there are 360 pounds of Th-232 buried in a waste pit full
> of=20
>      other contaminants.  We don't know exactly where in the pit
> this=20
>      material is or quite how deep.  What we do know is that it may
> be=20
>      pyrophoric and, we suspect, it is concentrated in one location.
>     =20
>      We would like to find this material before it finds us.  We're=20
>      thinking of using gamma spectroscopy to search for the Ac-228
> .991 =
> MeV=20
>      gammas.
>     =20
>      Any advice?  Thanks in advance!
>     =20
>      David Levy
>      Health Physicist
>      david.levy@fernald.gov
>      (513) 648-3816
> 
> 
> 
> ------ =_NextPart_000_01BD742D.3E4E2160
> Content-Type: application/ms-tnef
> Content-Transfer-Encoding: base64
> 
> eJ8+IjMRAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS
> 5NaWNy
> b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEkAYASAEAAAEAAAAMAAAAAwAAMA
> IAAAAL
> AA8OAAAAAAIB/w8BAAAAVwAAAAAAAACBKx+kvqMQGZ1uAN0BD1QCAAAAAHJhZHNhZmVAcm
> 9tdWx1
> cy5laHMudWl1Yy5lZHUAU01UUAByYWRzYWZlQHJvbXVsdXMuZWhzLnVpdWMuZWR1AAAeAA
> IwAQAA
> AAUAAABTTVRQAAAAAB4AAzABAAAAHQAAAHJhZHNhZmVAcm9tdWx1cy5laHMudWl1Yy5lZH
> UAAAAA
> AwAVDAEAAAADAP4PBgAAAB4AATABAAAAHwAAACdyYWRzYWZlQHJvbXVsdXMuZWhzLnVpdW
> MuZWR1
> JwAAAgELMAEAAAAiAAAAU01UUDpSQURTQUZFQFJPTVVMVVMuRUhTLlVJVUMuRURVAAAAAw
> AAOQAA
> AAALAEA6AQAAAAIB9g8BAAAABAAAAAAAAAKmQwEEgAEAGgAAAFJFOiBBIGh1bnRpbmcgd2
> Ugd2ls
> bCBnbyEAOggBBYADAA4AAADOBwQAHgALACsAKQAEAFoBASCAAwAOAAAAzgcEAB4ACwAoAB
> wABABK
> AQEJgAEAIQAAAEU5ODBCRTI4MUFFMEQxMTFCNjQ2MDA0MDMzRTAzNEZBAAQHAQOQBgDYBQ
> AAFAAA
> AAsAIwAAAAAAAwAmAAAAAAALACkAAAAAAAMALgAAAAAAAwA2AAAAAABAADkAQOxYg190vQ
> EeAHAA
> AQAAABoAAABSRTogQSBodW50aW5nIHdlIHdpbGwgZ28hAAAAAgFxAAEAAAAWAAAAAb10X4
> Mdn5V6
> BuAaEdG2RgBAM+A0+gAAHgAeDAEAAAAFAAAAU01UUAAAAAAeAB8MAQAAABEAAABnaWJiZ3
> JlZ0Bp
> c3UuZWR1AAAAAAMABhAhi77wAwAHEEcDAAAeAAgQAQAAAGUAAABEQVZJRCxJV0FTU0hBUk
> lOR1lP
> VVJNRVNTQUdFV0lUSFRPTUdFU0VMTEhFUkVBVElTVSxBTkRIRVNVR0dFU1RFRFBFUkhBUF
> NZT1VD
> T1VMRFRSWUxPT0tJTkdGT1JUSEUyNk1FAAAAAAIBCRABAAAATAQAAEgEAABfBwAATFpGdQ
> MZP3D/
> AAoBDwIVAqQD5AXrAoMAUBMDVAIAY2gKwHNldO4yBgAGwwKDMgPGBxMCg7ozEw19CoAIzw
> nZOxX/
> eDI1NQKACoENsQtgbvBnMTAzFCALChLyDAECYwBAIERhdmlkQiwKhUkgd2EEIHOjEcELgG
> cgeQhh
> IAeBEHNhZ2UbwGl0aCQgVANwIEcHkGVsLQMgaASQHUBhBUBJU2RVLB6gbmQeURwAdZJnHT
> BzdAmA
> IHAEkC0RwHAEIByRIAWgdWwhH1B0cnkgFZBvax8cUgIQBcAdgB1AMi42gQXQZVYgZ2FtAM
> BzHqAE
> EG9jBzAgAh1kbOItAdA4ICgggCBAEdF/IZAj4QXAC4AiUx0QB4Ag3QWBYSGAEbELgCkjcR
> vA/R4h
> OyaRIEAfQBxSAiAiU3MLgB/wcnUHgAIwHrBpjyihIMILUSXxbyB1EfDZHxBvZiDyEeEuCo
> UKhcZH
> FgAccEdpYgbgBjFMKGctAQnBZ0AEAHUyLgmAdSkrzAr0bGkIMTgwAtFpLTE0njQN8AzQMH
> MLWTE2
> CqDrA2AgAGMFQC0ylwqHMUvrDDAyFkYDYToznjIWDIIBGtQgTGV2eVtTIE1UUDpkGvIubD
> k3wUBm
> BJEHQDiQZ2/8dl0zPzRNBmACMDV/NousVGgrcThQeR8QQTIQiQMRMzAfEDE5OSTQ2DExOh
> gwE3BN
> Oc80TfcdsDwPNotNISApwAtQHUD7FgAjwHAIkAIwBCArIS/Qxx/wP/863nViajJRQh/1No
> tBHlB1
> AjAcUiegHVGbHjE5gCEuny+jMzYxFy8UIgwBMhZOM0YG8Gtzvxs2TjNO+k6QIkQdEGsdQF
> MrIQOR
> ZXgmwHYpsy//FgAHgChQKbQyEUfSHxBKkf8KwB6RBBApYBxSTvodgB6x/yJhHoIegUyhID
> AIYB9A
> RRPrPeAkoDMSIGIIch9QJeH/I2Ab0SAAIDAdcCIQISADIP8rIU76MjAeYSDxKZFUUQBwtU
> UALk4w
> VyaBAiAnBUA4a25vB+BRoADQdGz9IYB3HmMl5VjCHYAEAE+rPwDAJaEHMSXQRREFwHF1+x
> 1wHUBo
> XEENsCgQW2JVcv9KkVvAXBReIVVjWNEAwCGApmIdQE76cHkDYHBgYN0FEGMfIlODH6BzIE
> BTYtdY
> 0V4hWqFjKYFyI+Ml4f8CIB1AFZAmwCnCK7ZPb1uR/nchEy/QUREqoTBAH0FeA/9fF2MAIi
> Eo8Vjh
> aoEEICrQ/VtjJx6BVKwLgCHTKyEq0P8cUiMkZUMDYATwZCAhgCqhTxHwCsARsCIXQWMkoD
> L9JNAu
> PzAawCLiZ+ojI1tQk2fvdAVBbiGAYWQbAP1mQD9OMD3gAHBOwFgDdYC/AHBmQEs2dC83WH
> cqSCUw
> 40QQHZBQaHkAkCPARYcPTjM4XzljdyooNTEzgSdQNjQ4LTM4MeB/K8xLvzEXGjUyFgqFFS
> EAAYLg
> AwAQEAAAAAADABEQAAAAAEAABzDg6ocQX3S9AUAACDDg6ocQX3S9AR4APQABAAAABQAAAF
> JFOiAA
> AAAAAwANNP03AAAorA==
> 
> ------ =_NextPart_000_01BD742D.3E4E2160--
>