Author/Authors :
Carson، نويسنده , , M.J. and Davies، نويسنده , , J.C. and Daw، نويسنده , , E. and Hollingworth، نويسنده , , R.J. and Kirkpatrick، نويسنده , , J.A. and Kudryavtsev، نويسنده , , V.A and Lawson، نويسنده , , T.B. and Lightfoot، نويسنده , , P.K. and McMillan، نويسنده , , J.E and Morgan، نويسنده , , B. and Paling، نويسنده , , S.M and Robinson، نويسنده , , M. and Spooner، نويسنده , , N.J.C and Tovey، نويسنده , , D.R. and T، نويسنده ,
Abstract :
Presented here are results of simulations of neutron background performed for a time projection chamber acting as a particle dark matter detector in an underground laboratory. The investigated background includes neutrons from rock and detector components, generated via spontaneous fission and ( α ,n) reactions, as well as those due to cosmic-ray muons. Neutrons were propagated to the sensitive volume of the detector and the nuclear recoil spectra were calculated. Methods of neutron background suppression were also examined and limitations to the sensitivity of a gaseous dark matter detector are discussed. Results indicate that neutrons should not limit sensitivity to WIMP-nucleon interactions down to a level of ( 1 - 3 ) × 10 - 8 pb in a 10 kg detector.
Keywords :
n) reactions , Cosmic-ray muons underground , RADIOACTIVITY , Dark matter , WIMPs , neutron background , neutron flux , ( ? , Spontaneous fission
