Re:natural isotopes measured by WBC-compiled list

[LAM HOI CHING <lamhc@HKUSUA.HKU.HK>]

Dear radsafers,

    The following isotopes are identifiable by WBC Ge detectors in the WBC

scan room:

keV    possible isotopes

2614		Tl-208

1765		Bi-214

1592.6		Tl-208 (2614 - 2 * 511)

1460		K-40

1238		Bi-214

1120.5		Bi-214

969.2		Ac-228

911.1		Ac-228

609		Bi-214

583		Tl-208

352		Pb-214

295.4		Pb-214

238.5		Pb-212

185.7		U-235

92.8		Th-234

63.3		Th-234



669.8		Th-233  ???



that are the isotope peaks which can be identified by a whole body counter

Ge detector in my scan room.

As the local geographical nature of granite rock building material, Radon

and thoron family together with Potassium K and Uranium minerals are common.

Thank you for any comment on the above observations.



Regards

John Lam



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