Date: Thu Feb 8 17:38:03 2007

Author: Adolf Cortel

Subject: Re: Discharge Electrometer w Alpha Source

Post:
I use a 1 microC 241Am source inside a plastic tube with one open end
near the plate of a homemade Braun electroscope. Blowing the ionized air
in the tube with a small aquarium pump in the other end discharges the
electroscope quickly (half minute or so). The experiment is very
convincing because when the source is removed the electroscope
discharges much more slowly.
Adolf Cortel


Cliff Bettis escribió:
> Jerry,
>
> I am using a 1/2 mCi (millicurie) source. Even so it takes a minute or
> two for a Braun electroscope to discharge. I haven't tried it with an
> electrometer; maybe I can give that a try tomorrow.
>
> Cliff
>
> ----- Original Message -----
> *From:* Gerald Zani
> *To:* tap-l@lists.ncsu.edu
> *Sent:* Thursday, February 08, 2007 3:28 PM
> *Subject:* Re: [tap-l] Discharge Electrometer w Alpha Source
>
> Cliff,
>
> I've tried a 2cm square chunk of pitch blende (radon alpha
> emitter), Fe-55 100 uC, C-14 10 uC, and Cs-137 5 uC.
>
> All to no avail. -- JZ
>
> At 03:51 PM 2/8/2007, you wrote:
>> Jerry,
>>
>> It works with either charge for me. I used an electroscope and a
>> Po 210 source.
>>
>> Cliff
>> ----- Original Message ----- From: "Gerald Zani"
>> >
>> To:
>> Sent: Thursday, February 08, 2007 2:26 PM
>> Subject: [tap-l] Discharge Electrometer w Alpha Source
>>
>>
>>> Tappers,
>>>
>>> Using an alpha emitter I find I can discharge a positively
>>> charged electrometer.
>>>
>>> But I cannot discharge a negatively charged electrometer.
>>>
>>> Is this correct, or am I doing something wrong?
>>>
>>>
>>> Thanks,
>>> -- JZ
>>


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