jeffkoch - Slashdot User

Submission + - Neutron Detectors: Alternatives To Using Helium-3 (gao.gov)

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jeffkoch

on Wednesday November 02, 2011 @11:37AM

jeffkoch writes: "The US General Accountability Office released a report discussing alternatives to Helium-3 based technologies for neutron detectors.
Full report is here:
http://www.gao.gov/products/GAO-11-753
1-page summary is here:
http://www.gao.gov/highlights/d11753high.pdf"

Comment Red Shift - was:Re:Targets (Score 1) 32

by jeffkoch on Sunday April 25, 2010 @10:58PM (#31980238) Attached to: LOFAR Telescope Array Grabs First Pulsar Images

> pulsars, for example, are often observed around the 1-1.5 GHz range. (There's a hydrogen emission line at 1.5 GHz,...

Yes, but as you look at objects farther away, they are also moving away from us at higher speeds causing red shift in all their emissions. So the 7 meter (40MHz) signals originated at a much higher frequency.

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