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    Monte Carlo simulation of GCR neutron capture production of cosmogenic nuclides in stony meteorites and lunar surface

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    Author
    Kollr, D.
    Michel, R.
    Masarik, J.
    Issue Date
    2006-01-01
    
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    Citation
    Kollar, D., Michel, R., & Masarik, J. (2006). Monte Carlo simulation of GCR neutron capture production of cosmogenic nuclides in stony meteorites and lunar surface. Meteoritics & Planetary Science, 41(3), 375-389.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656111
    DOI
    10.1111/j.1945-5100.2006.tb00469.x
    Additional Links
    https://meteoritical.org/
    Abstract
    A purely physical model based on a Monte Carlo simulation of galactic cosmic ray (GCR) particle interaction with meteoroids is used to investigate neutron interactions down to thermal energies. Experimental and/or evaluated excitation functions are used to calculate neutron capture production rates as a function of the size of the meteoroid and the depth below its surface. Presented are the depth profiles of cosmogenic radionuclides 36Cl, 41Ca, 60Co, 59Ni, and 129I for meteoroid radii from 10 cm up to 500 cm and a 2-pi irradiation. Effects of bulk chemical composition on n-capture processes are studied and discussed for various chondritic and lunar compositions. The mean GCR particle flux over the last 300 ka was determined from the comparison of simulations with measured 41Ca activities in the Apollo 15 drill core. The determined value significantly differs from that obtained using equivalent models of spallation residue production.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2006.tb00469.x
    Scopus Count
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    Meteoritics & Planetary Science, Volume 41, Number 3 (2006)

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