We report oil the first measurement of Ar-39 in argon from underground natural gas reservoirs. The gas stored in the US National Helium Reserve was found to contain a low level of Ar-39. The ratio of 39Ar to stable argon was measured to be <= 4 x 10(-17) (84% C.L.), less than 5% the value in atmospheric argon (Ar-39/Ar = 8 x 10(-16)). The total quantity of argon currently stored in the National Helium Reserve is estimated at 1000 tons. 39Ar represents one of the most important backgrounds in argon detectors for WIMP dark matter searches. The findings reported demonstrate the possibility of constructing large multi-ton argon detectors with low radioactivity suitable for WIMP dark matter searches. (C) 2007 Elsevier B.V. All rights reserved
The DarkSide-50 (DS-50) two-phase liquid argon (LAr) detector has been searching for weakly interact...
International audienceLiquid argon is a bright scintillator with potent particle identification prop...
Argon is a powerful scintillator and an excellent medium for detection of ionization. Its high discr...
We report oil the first measurement of Ar-39 in argon from underground natural gas reservoirs. The g...
We report on the first measurement of (39)Ar in argon from underground natural gas reservoirs. The g...
Large liquid argon detectors offer one of the best avenues for the detection of galactic weakly inte...
There has been accumulating evidence for the existence of dark matter in the uni-verse, but its natu...
Liquid argon is a bright scintillator with potent particle identification properties, making it an a...
AbstractArgon is a powerful scintillator and an excellent medium for detection of ionization. Its hi...
The DarkSide-50 (DS-50) two-phase liquid argon (LAr) detector has been searching for weakly interact...
International audienceLiquid argon is a bright scintillator with potent particle identification prop...
Argon is a powerful scintillator and an excellent medium for detection of ionization. Its high discr...
We report oil the first measurement of Ar-39 in argon from underground natural gas reservoirs. The g...
We report on the first measurement of (39)Ar in argon from underground natural gas reservoirs. The g...
Large liquid argon detectors offer one of the best avenues for the detection of galactic weakly inte...
There has been accumulating evidence for the existence of dark matter in the uni-verse, but its natu...
Liquid argon is a bright scintillator with potent particle identification properties, making it an a...
AbstractArgon is a powerful scintillator and an excellent medium for detection of ionization. Its hi...
The DarkSide-50 (DS-50) two-phase liquid argon (LAr) detector has been searching for weakly interact...
International audienceLiquid argon is a bright scintillator with potent particle identification prop...
Argon is a powerful scintillator and an excellent medium for detection of ionization. Its high discr...