雷 léi, lèi
切 qiē, qiè, qì
尔 ěr

This would be pronounced something like "lay-chee-are". This is a standard way of translating Rachael into Chinese.

Or you may check this out for standard mandarin pronunciation:
lei : http://dict.iciba.com/%E9%9B%B7/
qieh : http://dict.iciba.com/%E5%88%87/
erh : http://dict.iciba.com/%E5%B0%94/

Be sure to click on the little trumpet icon to play the sound.

BTW, your name is a name so COOL!