Abstract
We have measured positron lifetime and Doppler-broadening spectra for exfoliated grafoil having different coverages of physisorbed monolayers of ${\mathrm{N}}_{2}$ at 77 K. The lifetime spectra have been resolved into three exponentials and the Doppler-broadening spectra have been analyzed in terms of the shape parameter. The lifetime components, their relative intensities, and the shape parameter are sensitive to ${\mathrm{N}}_{2}$ coverage. These results are discussed in terms of the ``local'' density of surface electrons, positron work function, and defects.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
