links for 2008-04-17

Tags
Categories

More like this

ICA Supreme Cuisine | Wii⢠& DS⢠Iron Chef America: The video game (tags: food games television computing silly) Setshot: Basketball for the Aging and Infirm: Careers: A 73 year-old college basketball player! There's hope for me yet... (tags: sports basketball blogs silly) Mr. Dawkins,…
Stopping atoms A "coil-gun" method for slowing atomic beams without lasers, from the Raizen group at Texas (tags: physics low-temperature science atoms) Confessions of a Community College Dean: An Open Letter to Mayor Richard M. Daley The Dean Dad is less polite to Hizzoner than I was (tags:…
birds are gross - rosemary mosco The awesome turkey vulture. (tags: comics biology science silly) nanoscale views: Combined single-molecule electronics and optics "The two-sentence summary: we can do simultaneous electronic and optical measurements on single molecules (!) by using our…
Setshot: Basketball for the Aging and Infirm: Politics: McCain panders to aging ballers "Apparently, "Sarah Barracuda" (her high school hoops nickname) played point guard on a state championship squad from Wasilla, Alaska, but there is scant evidence that she plays anymore." (tags: US politics…

Collar, JI, et al., Science 319(5865) 933 (2007)
"Spin-Dependent WIMP Limits from a Bubble Chamber"

Sensitivity, selectivity, modest cost, and active medium Enviro-whiner hissy fit CF3I. Large scale apparatus using perfluorobutane is exciting.

Like 100,000 gallons of perchloroethylene buried 4900 feet deep, it lacks the looming visceral thrill of dropping a hex nut and blasting South Dakota into space. Uncle Al recommends a Media darling active medium: iodine heptafluoride, IF7.

CF3I,
bp -32.5°C, d = 2.36 g/ml
@ 25°C, d = 2.06 g/ml liquid
29.092 wt-% F, 64.777 wt-% I

IF7,
mp = 4.5 C d = 2.7 g/cm^3 (solid)
bp = 4.77 C, colorless
51.171 wt-% F, 48.829 wt-% I

Incompatible with Pyrex, fused silica (Teflon AF windows?), and most metals (Monel?); expensive, corrosive, toxic, malodorous. IF7 has it all!