<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hello all,<div class=""> This is what electron-positron pair production from a double-helix photon might (roughly) look like. There should be an atomic nucleus nearby to absorb excess momentum from the process. Also attached is a computer graphic of a single electron model with instructions for graphing it with a nice 3D graphing program called Graphing Calculator.</div><div class=""> Richard</div><div class=""></div></body></html>