What's New?
.	HPS and CRCPD Proclaim 8-14 November 2009 as National Radiation Protection Professionals Week
.	November Newsletter
.	NRC Academic Program Nuclear Education Grants, FY2010, Now Accepting Applications
.	November ORS
.	November Journal
.	EPA's STAR Graduate and GRO Undergraduate Fellowship Funding Now Accepting Applications

Upcoming Events
.	2010 HPS Midyear Topical Meeting Radiation Risk Communication to the Public 24-27 January 2010 Albuquerque, NM
.	2010 HPS Professional Development School Radiation Risk Communication: Issues and Solutions 27-29 January 2010 Albuquerque, NM

07 November 2009

Decay, radioactive

The decrease in the amount of any radioactive material with the passage of time due to the spontaneous emission from the atomic nuclei of either alpha or beta particles, often accompanied by gamma radiation.