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    A benign, low Z electron capture agent for negative ion TPCs

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    Genre
    Journal Article
    Date
    2009-01-11
    Author
    Martoff, CJ
    Dion, MP
    Hosack, M
    Barton, D
    Black, JK
    Subject
    Dark matter
    Negative ion
    X-ray polarimeter
    Diffusion
    Ion mobility
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/6078
    
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    DOI
    10.1016/j.nima.2008.09.042
    Abstract
    We have identified nitromethane (CH3 NO2) as an effective electron capture agent for negative ion TPCs (NITPCs). We present drift velocity and longitudinal diffusion measurements for negative ion gas mixtures using nitromethane as the capture agent. Not only is nitromethane substantially more benign than the only other identified capture agent, CS2, but its low atomic number will enable the use of the NITPC as a photoelectric X-ray polarimeter in the 1-10 keV band. © 2008 Elsevier B.V. All rights reserved.
    Citation to related work
    Elsevier BV
    Has part
    Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/6060
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