Dean W. Armstrong

I've hesitated to comment much on the ongoing Japanese tragedy, but I wish to talk a little about the output coming out from the reactor...

"The magic numbers, as we know them now are : 2, 8, 20, 28, 50, 82, 126 and most importantly, they are the same for neutrons and proton...

The New York Times has a surprising article today about the radiation risks of granite counters . Granite is an intrusive rock--slowly coole...

From the report of the committee on public safety : However, the emergence and commercialization of new and highly sophisticated technology ...

A non-review, since I didn't post about things I saved in "starred items" in Google Reader. So, some quick posts about them. ...

Estimated gamma-ray radiation doses from above-ground nuclear testing in Nevada, as of 1957. Above-ground testing continued, at a higher pa...

I built Charles Wenzel's simple ion chamber . It creates an electric field inside the can via a battery. A wire in the center of the ...

Are bananas radioactive? We've all heard they are rich in potassium, good to eat to restore electrolyte balance in the human body, but ...

Robert Merkel does the calculations on the leaks from the nuclear power plant in Japan and makes the point most media missed: the leak of w...

A computer UPS status report. On seeing this, my first thought was, "I really hope there is no actinium in this UPS." My second t...

By long-delayed request , a schematic of the geiger counter clicker unit I built to supplement the Aware Electronics RM-70. I'm not ve...

The online Geiger counter is temporarily off while I deal with power issues in my office. I've also been thinking of taking it and a ...

Be amused that a 1989 report on the containment of radiation from underground nuclear tests from the Office of Technology Assessment, a mori...

What a piece of alarmist drivel. ABC Primetime "exposed" the security of university teaching and research reactors. "Oh my g...

The radioactivity of atmospheric krypton in 1949–1950 Anthony Turkevich, Lester Winsberg, Howard Flotow, and Richard M. Adams http://www.pub...

I bought a Geiger counter as a birthday present for myself. It is an Aware Electronics RM-70. It is cheaper than traditional Geiger counter...