Well, we are thinking at a specific application, and developing a system
that would allow dynamic measurements
A 11:59 18/10/01 +0100, vous avez écrit :
>Dear Bernard (et al)
>Since the 4He signal is typically 5 orders of magnitude larger than 3He is it
>worthwhile having double collection, as opposed to spending most of the time
>counting on 3He?
>Grenville Turner
>
>Bernard Marty wrote:
>
>> Dear all,
>>
>> We are presently looking for a split mass spectrometer tube that would
>> allow the simultaneous collection of 3He and 4He. VG-Micromass has been
>> selling for years the MM3000 then the VG5400 with this option but they
>> don't want to do it anymore. Since they now have the monopole of
>> manufacturing and selling noble gas mass spectrometers after having bought
>> their only competitor, MAP (I wonder if this is really allowed, we the
>> customers should probably look more carefully at this), they are absolutely
>> not ready to envision anything but selling the already existing, 17 years
>> old VG5400 in the basic configuration.
>>
>> So we are considering any proposal, a complete machine, or just the split
>> tube, or anything intermediate.
>>
>> Regards
>>
>> Bernard
>> _____________________________________________________________
>> Bernard Marty
>>
>> Professeur de Geochimie
>> Ecole Nationale Supérieure de Géologie
>> Centre de Recherches Petrographiques et Geochimiques (CRPG)
>> 15 Rue Notre-Dame des Pauvres, BP 20
>> 54501 Vandoeuvre Les Nancy Cedex France
>>
>> http://www.crpg.cnrs-nancy.fr/Equipes/FR/bmarty.html
>>
>> email : [log in to unmask]
>> Tel : 33 (0)3 83 59 42 22
>> Fax : 33 (0)3 83 51 17 98
>> _______________________________________________________________
>
>
_____________________________________________________________
Bernard Marty
Professeur de Geochimie
Ecole Nationale Supérieure de Géologie
Centre de Recherches Petrographiques et Geochimiques (CRPG)
15 Rue Notre-Dame des Pauvres, BP 20
54501 Vandoeuvre Les Nancy Cedex France
http://www.crpg.cnrs-nancy.fr/Equipes/FR/bmarty.html
email : [log in to unmask]
Tel : 33 (0)3 83 59 42 22
Fax : 33 (0)3 83 51 17 98
_______________________________________________________________
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