053010000000000000">
4.3.0.1  Varying the temperature </A>
</H4>

<P>
It is possible to change the temperature of the system or to sample the 
canonical ensemble fixing the average temperature, this is done using 
the Nos&#233; thermostat. To activate this thermostat for ions you have 
to specify in namelist &amp;IONS:
<PRE>
           &amp;ions
              ion_dynamics = 'verlet',
              ion_temperature = 'nose',
              fnosep = 60.0,
              tempw = 300.0
           /
</PRE>
where <T