This is easy - a crystal not diffracting in the loop provides a datum -
that crystal or object does not diffract. No crystal in the loop
provides no information on the system you are studying beyond the skill
of the person fishing.
Cheers, Matt,
On 2/1/2019 9:48 AM, [log in to unmask] wrote:
> Dear Leo,
>
> I would argue that not getting diffraction would indicate that the sample under study is not a crystal ;-)
>
> That way the two scenarios are the same - in neither case do you have a crystal in the loop
>
> All the best Graeme
>
>
>
>> On 1 Feb 2019, at 08:42, CHAVAS Leonard <[log in to unmask]> wrote:
>>
>> Dear all
>>
>> I had one interesting comment today at the beamline, that I would like to share with you for your advice on how to answer this...
>>
>> Is it better to have no diffraction from a crystal you shoot, or to have no crystal in the loop?
>>
>> Hum, difficult one...
>>
>> Cheers, leo
>>
>> -
>> Leonard Chavas
>> -
>> Synchrotron SOLEIL
>> Proxima-I
>> L'Orme des Merisiers
>> Saint-Aubin - BP 48
>> 91192 Gif-sur-Yvette Cedex
>> France
>> -
>> Phone: +33 169 359 746
>> Mobile: +33 644 321 614
>> E-mail: [log in to unmask]
>> -
>>
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--
Matthew Bowler
Synchrotron Crystallography Group
European Molecular Biology Laboratory
71 avenue des Martyrs
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France
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