Synchrotron X-ray study of monolayer krypton melting

The authors have studied the melting of commensurate monolayer krypton on graphite using very high-resolution synchrotron radiation X-ray diffraction techniques; a krypton particle size of 2300 AA is obtained. The melting transition appears to be second order at 112.9K with an order parameter exponent beta =0.065+or-0.015 and a broadening of Tc, sigma / approximately 0.0006 which we attribute to finite particle size. Although the broadening is much less than that obtained in coarser resolution experiments, the exponent beta agrees with those previous results.