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From: darrelj@sdcrdcf.UUCP
Newsgroups: net.physics
Subject: Re: Particle Mass
Message-ID: <791@sdcrdcf.UUCP>
Date: Sun, 22-Jan-84 11:38:58 EST
Article-I.D.: sdcrdcf.791
Posted: Sun Jan 22 11:38:58 1984
Date-Received: Fri, 27-Jan-84 06:30:54 EST
References: <15815@sri-arpa.UUCP>
Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Organization: System Development Corporation, Santa Monica
Lines: 19

1 electron volt ~ 1.8E-33 grams.
An EV is a measure of energy imparted to an electron accelerated by a
electric field of 1 volt.  Since mass is energy, the conversion is legal.
The reason for use of EV is the mass of a proton is 1.7E-24 grams or just
under 1 giga-electron volt (1GEV) and an electron is around 500,000 EV
(much tidier to read/write than .0000000000000000000000017 g and
.000000000000000000000000001 g respectively and you don't have to worry
about your typesetter miscounting zeros or having trouble with 
  -27
10       getting formatted right).

-- 
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,sdccsu3,trw-unix}!sdcrdcf!darrelj
VANBUER@USC-ECL.ARPA