5.8. [ Temperature ] section

In this section, the free-gas thermal temperature is defined. The unit is MeV. Time dependence cannot be specified. This temperature can also be defined as a cell parameter in the [cell] section; however, if regions overlap, the value defined in the [temperature] section takes precedence. If the temperature is double defined, temperatures defined in this [temperature] sections are used. If no definition, the default value \(2.585\times 10^{-8}\,\mathrm{MeV}\) is used. Note that in general temperature has an effect on only behavior of thermal neutrons, and has no effect on those of other particles.

The format is as follows.

[ Temperature ]
  reg                 tmp
  1                   1.0*1.e-8
  11                  5.0*1.e-8
  ( { 2 - 5 } 8 9 )   2.0*1.e-8
  ( 11 12 15 )        3.0*1.e-8
  16                  6.0*1.e-8
  ....                ........
  ....                ........

The format ( { 2 - 5 } 8 9 ) can be used. However, any value that is not single numeric must be enclosed value by ( ) . Lattice or universe specifications such as ( 6 < 10[1 0 0] < u=3 ) are not supported.

To change the order of region number (reg) and temperature (tmp), set as tmp reg. The skip operator non can be used.