|
|
News
2008/07/23
|
After a long waiting time, the Kr distillation
column was finally delivered to LNGS. Kr-85 is
one intrinsic radioactive source in Xe. The
XENON100 experiment's sensitivity goal
requires a Kr/Xe contamination level lower
than 50 ppt. The current Kr/Xe contamination
level in XENON100 is about 5 ppb. Cryogenic
distillation through the new column, which
will take about two weeks for the 170 kg Xe in
the detector, will reduce the Kr/Xe level by
three orders of magnitude, making the Kr-85
contribution to the XENON100 total background negligible.
|
|
