[ RadSafe ] Calling the list owner

Thu Nov 5 17:49:45 CST 2009

I call the list owner to put an end to the name calling, bullying and 
America bashing this on this forum

George Dowell

----- Original Message ----- 
From: "Franz Schönhofer" <franz.schoenhofer at chello.at>
To: "'Geo>K0FF'" <GEOelectronics at netscape.com>; "RADSAFE" 
<radsafe at radlab.nl>
Sent: Wednesday, November 04, 2009 1:44 PM
Subject: AW: Eating Thallium vs NaI(Tl) crystals

Dear George,

Your reply is very close to the absurd reasoning of ultra-green, ultra
anti-nuclear and ultra "against anything" activists, because you
deliberately twist facts: While I was referring to the potential hazard of
NaI(Tl) crystals being eaten (!) you obviously refer to thallium ingested as
a poison for rats (not mentioned in which chemical form). You have not given
any explanation to your comment on the "toxicity of NaI) crystals. Forget
this "toxicity".

I eat quite some NaCl every day, but I cannot see any reason why I should
incoporate any Tl - and I would urge you not to do it either.

Best wishes for your health and appropriate intake of food!

Franz

Franz Schoenhofer, PhD
MinRat i.R.
Habicherg. 31/7
A-1160 Wien/Vienna
AUSTRIA

-----Ursprüngliche Nachricht-----
Von: Geo>K0FF [mailto:GEOelectronics at netscape.com]
Gesendet: Mittwoch, 04. November 2009 02:31
An: Geo>K0FF; Franz Schönhofer
Betreff: Re: [ RadSafe ] Optical Couplant

Franz, I will eat 2 g of NaCl if you eat 2 g of Thallium.
----- Original Message ----- 
From: "Geo>K0FF" <GEOelectronics at netscape.com>
To: "Franz Schönhofer" <franz.schoenhofer at chello.at>
Sent: Tuesday, November 03, 2009 5:41 PM
Subject: Re: [ RadSafe ] Optical Couplant

> Franz, I will eat 2 gr of NaCl if you eat 2 gr of Thallium.
>
>
> George Dowell
> ----- Original Message ----- 
> From: "Franz Schönhofer" <franz.schoenhofer at chello.at>
> To: "'Geo>K0FF'" <GEOelectronics at netscape.com>; "'AnaLog Services, Inc.'"
> <AnaLog at logwell.com>; "'Edmond Baratta'" <edmond0033 at comcast.net>;
> <alstonchris at netscape.net>
> Cc: <radsafe at radlab.nl>
> Sent: Tuesday, November 03, 2009 5:35 PM
> Subject: AW: [ RadSafe ] Optical Couplant
>
>
> RADSAFErs,
>
> Another case of fundamental lack of very basic understanding: How much Tl
> is
> in such a crystal? What is the LD 50 of Tl? Has ever anybody eaten or at
> least tasted a NaI(Tl) crystal? How does it taste? How does the mineral
> oil
> taste and should one also use a little vinegar when eating it? Anybody
> aware
> that NaCl (also called "salt") is deadly if consumed in large amounts?
>
> This statement reminds me on the infamous statements about the toxicity of
> plutonium, polonium, radium and all other radionuclides. "The dose makes
> the
> poison!" - Famous statement of the famous Paracelsus, which is still
> valid.
> (Btw, he is buried in Salzburg in a beautiful romantic graveyard.)
>
> Best regards,
>
> Franz
>
> Franz Schoenhofer, PhD
> MinRat i.R.
> Habicherg. 31/7
> A-1160 Wien/Vienna
> AUSTRIA
>
>
> -----Ursprüngliche Nachricht-----
> Von: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] Im
> Auftrag
> von Geo>K0FF
> Gesendet: Dienstag, 03. November 2009 20:59
> An: AnaLog Services, Inc.; Edmond Baratta; alstonchris at netscape.net
> Cc: radsafe at radlab.nl
> Betreff: Re: [ RadSafe ] Optical Couplant
>
> It is the Thallium dopant that is so very toxic in the NaI(Tl) crystals.
>
> In the early days, crystals were mounted right on the PMT but immersed in
> a
> cup of
> mineral oil. Today, these 1950's units still work if the oil is intact.
> Many
>
> of them have leaked though, creating quite a mess.
>
> George Dowell
> ----- Original Message ----- 
> From: "AnaLog Services, Inc." <AnaLog at logwell.com>
> To: "Edmond Baratta" <edmond0033 at comcast.net>; <alstonchris at netscape.net>
> Cc: <radsafe at radlab.nl>
> Sent: Tuesday, October 27, 2009 11:52 PM
> Subject: Re: [ RadSafe ] Optical Couplant
>
>
>> As far as I know, it is rare to have naked crystal material coupled
>> directly to the PMT face.  At least it is rare in my industry.  I have
>> seen it, but only a couple of times.  NaI is quite hygroscopic so dealing
>> with bare crystal material except in a special facility is problematic.
>> I
>
>> believe NaI is regarded as toxic also.
>>
>> Heck, we have problems with crystals turning yellow even in the hermetic
>> containers.
>>
>> Syd H. Levine
>> AnaLog Services, Inc.
>> Phone:  (270) 276-5671
>> Telefax:  (270) 276-5588
>> E-mail:  analog at logwell.com
>> Web URL:  www.logwell.com
>>
>> ----- Original Message ----- 
>> From: "Edmond Baratta" <edmond0033 at comcast.net>
>> To: <syd.levine at mindspring.com>; <alstonchris at netscape.net>
>> Cc: <radsafe at radlab.nl>
>> Sent: Tuesday, October 27, 2009 8:11 PM
>> Subject: Re: [ RadSafe ] Optical Couplant
>>
>>
>>>I believe only the older ones were coupled.  Most of the newer ones are
>>>coupled directly and sealed.  The manufacturers used to supply (sell) the
>>>material to couple the older ones.
>>>
>>> Ed Baratta
>>>
>>> edmond0033 at comcast.net
>>>
>>> --------------------------------------------------
>>> From: <alstonchris at netscape.net>
>>> Sent: Tuesday, October 27, 2009 6:10 PM
>>> To: <syd.levine at mindspring.com>
>>> Cc: <radsafe at radlab.nl>
>>> Subject: Re: [ RadSafe ] Optical Couplant
>>>
>>>>
>>>> Syd
>>>>
>>>> Is there nothing in Knoll (Radiation Detect and Measure) that's useful
>>>> on this subject?  Also, e.g., research-grade NaI crystals are mated
>>>> directly to the PMT, no?
>>>>
>>>> Cheers
>>>> cja
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Syd H. Levine <syd.levine at mindspring.com>
>>>> To: J. Marshall Reber <jmarshall.reber at comcast.net>
>>>> Cc: radsafe at radlab.nl
>>>> Sent: Sat, Oct 17, 2009 10:16 pm
>>>> Subject: Re: [ RadSafe ] Optical Couplant
>>>>
>>>>
>>>> I looked for something, even qualitative, and could not find anything
>>>> interesting. I found some stuff related to fiber optics that surprised
>>>> me (not as big an improvement as I expected), but I do not know how
>>>> that
>
>>>> applies to scintillation detectors. I do not *think* a scintillation
>>>> detector will work at all without coupling compound.
>>>>
>>>> Syd
>>>>
>>>> ----- Original Message ----- From: "J. Marshall Reber"
>>>> <jmarshall.reber at comcast.net>
>>>> To: "Syd H. Levine" <syd.levine at mindspring.com>
>>>> Cc: <radsafe at radlab.nl>
>>>> Sent: Saturday, October 17, 2009 3:48 PM
>>>> Subject: Re: [ RadSafe ] Optical Couplant
>>>>
>>>>>
>>>>> On Oct 17, 2009, at 4:21 PM, Syd H. Levine wrote:
>>>>>
>>>>>> I finally got around to writing a page about optical coupling
>>>>>> compounds:
>>>>>> http://www.logwell.com/tech/servtips/optical_coupling_grease.html
>>>>>>
>>>>>> Comments or criticisms needed and much appreciated.
>>>>>
>>>>> It would be useful to quote in quantitative terms the actual light >
>>>>> transmission improvement of using the coupling compounds.
>>>>>
>>>>> Unfortunately I am unaware of such data.
>>>>>
>>>>> J. Marshall Reber, ScD
>>>>> 165 Berkeley St.
>>>>> Methuen MA 01844
>>>>>
>>>>> Tel/Fax: 978-683-6540
>>>>> Alternate Email: reber at alum.mit.edu
>>>>>
>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> You are currently subscribed to the RadSafe mailing list
>>>>
>>>> Before posting a message to RadSafe be sure to have read and understood
>>>> the RadSafe rules. These can be found at:
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>>>>
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>>>>
>>>> =
>>>> _______________________________________________
>>>> You are currently subscribed to the RadSafe mailing list
>>>>
>>>> Before posting a message to RadSafe be sure to have read and understood
>>>> the RadSafe rules. These can be found at:
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>>>>
>>>
>>>
>>
>> _______________________________________________
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>>
>> Before posting a message to RadSafe be sure to have read and understood
>> the RadSafe rules. These can be found at:
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>
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