<DIV>Dear all,</DIV>
<DIV>In vega's email below, he talk about the <SPAN>variable t(time). How should I put this variable into the equation or algorithm of NEB?</SPAN></DIV>
<DIV><SPAN>and how should I calculate the image changing with time?</SPAN><BR><BR>Thank you for guidance.</DIV>
<DIV> charlary</DIV>
<DIV></DIV><BR><PRE>Nicola Marzari" <marzari@MIT.EDU>
>vega lew wrote:
>> Dear all,
>>
>> I used to perform NEB calculations to estimate the energy barrier for
>> certain chemical reaction.
>> The calculated activation barrier is about 0.2 eV. I want the see the
>> reaction process during some pico-second of CP calculations.
>> Do you think the reaction could happen in such a short time? and what
>> temperature is suitable for jumping over the saddle point?
>>
>> thank you for reading
>>
>> best wishes,
>>
>> vega
>
>
>Hi Vega,
>
>try to work this out by yourself, looking at the arrhenius formula ; put an
>attempt rate comparable to say an optical phonon. But the answer is
>probably yes,
>especially if you are a bit over room temperature (500-600K).
>
> nicola
>
>
>--
>---------------------------------------------------------------------
>Prof Nicola Marzari Department of Materials Science and Engineering
>13-5066 MIT 77 Massachusetts Avenue Cambridge MA 02139-4307 USA
>tel 617.4522758 fax 2586534 marzari@mit.edu http://quasiamore.mit.edu
>
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