lass="p">(</span><span class="mf">2.0_rp</span><span class="o">*</span><span class="n">E_G</span><span class="o">/</span><span class="p">(</span><span class="n">Z_G</span> <span class="o">+</span> <span class="mf">1.0_rp</span><span class="p">))</span><span class="o">*</span><span class="p">(</span><span class="n">g</span><span class="o">**</span><span class="mi">2</span> <span class="o">-</span> <span class="mf">1.0_rp</span><span class="p">)</span><span class="o">/</span><span class="n">g</span>
    <span