Abstract
Photon-induced sputtering of excited-state sodium atoms from NaCl and NaF crystals was investigated with synchrotron radiation. It was found that tune response of the sputtering of excited-state sodium atoms consists of two components, and that the fast component is several orders of magnitude faster than the existing results of time response for ground-state alkali atoms. It is suggested that the fast sputtering of excited-state alkali atoms may be interpreted in terms of lattice instability due to electronic excitation in the surface layer.
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