History: David D. Clark

[Mike Grissom <mikeg@SLAC.Stanford.EDU>]

Radsafers,

The following obituary appeared in the January 13, 1998
edition of the San Jose Mercury News:

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CLARK, David D., 73,

a nuclear physicist who developed a nuclear research tool
that promises to provide more precise analyses of materials;
Dec. 22 at his office at Cornell University of cardiac
arrhythmia.  Recently, Mr. Clark led a team that completed
the design of a device that uses cold neutrons to help
researchers learn the chemical composition of materials.
The device will be fully operational at Cornell later this
year, university officials said.  The analysis tool that Mr.
Clark and his team designed will guide the neutrons, which
will travel very slowly because they are so cold, away from
the background radiation at a reactor and transport them about
42 feet to bombard a sample of material to be analyzed.  That
will avoid the background noise caused by thermal and fast
neutrons and gamma rays.

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