My first thought was H2O+ is an ion that would be generated in a mass spectrometer with water as a sample. I looked up - H2O ion radiation - on Google and got better links. Strong radiation can kick an electron off a water molecule, leaving H2O+, a reactive free radical, i.e. a molecule with an unpaired electron. Unstable free radicals will quickly react with other molecules, and this can have deleterious effects on living organisms. The H2O+ in beauty products just means the product contains humectants, chemicals that absorb and retain water, such as glycerol. Retained moisture improves the appearance and texture of skin and hair. H2O+ radicals would have the opposite effect. Karen Tellefsen - Electrical Testing [log in to unmask] 908-791-3069 [TN] H2O+ Stadem, Richard D. to: TechNet 06/27/2011 01:44 PM Sent by: TechNet <[log in to unmask]> Please respond to TechNet E-Mail Forum, "Stadem, Richard D." I have a technical op sheet that deals with E-beam irradiation for space product that will enter the atmosphere or land on a planet other than ours, or will re-enter our own atmosphere after having been elsewhere. In order to meet Planetary Protection standards we do the irradiation. In the document, it describes collateral byproducts of the irradiation, all of which I understand except the term H2O+ . When I tried to look up H2O+ all I could find was beauty products. Does anybody know what H2O+ is, from a chemical standpoint? ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 16.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------