Re: query

[Yann Donjoux <Yann.Donjoux@cern.ch>]

"Bauman, Rodney L. (84U)" wrote:

[...]

> Natural Th-232

> The 236 keV peak is from daughter Pb-212 (239 keV at 47%)

> The 339 keV peak is from daughter Ac-228 (338 keV at 15%)

> The 584 keV peak is from daughter Tl-208 (583 keV at 86%)

[...]



I have the same judgement.

For the 73 keV peak, if you have a shielding made of lead, it is the

X-Ray fluorescence peak that you see.



Regards,



Yann D.



> > -----Original Message-----

> > From: D J Hornsey [SMTP:bssdjh@BATH.AC.UK]

> > Sent: Friday, August 24, 2001 7:03 AM

> > To:   radsafe@list.vanderbilt.edu

> > Subject:      query

> >

> >

> >   Dear Radsafers,

> >             Our Physics department is having a spring clean, and in a

> > batch of samples for disposal was a radioactive one labelled Zirconium

> > Fluoride glass. A gamma spec. of the sample revealed a major peak at 236

> > keV and minor ones at 73, 339 and 584 keV.

[...]





-- 

 _____________________________________________________________

| Yann Donjoux   Division TIS / Radioprotection (RP) - E07900 |

| CERN, Organisation européenne pour la Recherche Nucléaire   |

| CH-1211 Geneve 23, Switzerland.                             |

| Bat : 23-R-027                                              |

| Electronic mail      Yann.Donjoux@cern.ch                   |

|_____________________________________________________________|

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