I had made the Interior-type Gamma-Ray spectrometer by GR-SAKURA. This is a escalation of my work, http://renesasrulz.com/gadget_renesas_user_forum/f/128/t/4280.aspx
I had put the video clip. You will see shifting the pattern to up, while detecting gamma-rays.
Enjoy GR-SAKURA!
Thank you.
digip