How to close the terminal after running an application via Apache ANT?

Question

linux

Using in ANT, I want to run a command like:
#> evince /home/my.pdf & exit
I try the following code:

<exec executable="/bin/sh">
   <arg value="-c"/>
   <arg value="evince /home/my.pdf &amp; exit"/>
</exec>

The program starts, but closes immediately with the terminal. What needs to be changed so that the program starts and immediately after that only the terminal closes, but not the program itself?