Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.p21a..07l&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #P21A-07
Astronomy and Astrophysics
Astrophysics
0738 Ice (1863), 1863 Snow And Ice (0736, 0738, 0776, 1827)
Scientific paper
In the solar system, water (the most abundant of materials) and many other gases are contained in the interstellar medium and planets. They experienced constant irradiation by solar wind and radiation. In order to simulate the above condition in the earth laboratory, several ion species are applied to bombard several gases (CH4 and NH3) mixed with iced water and the optical spectroscopy of sputtered particles from the surface of mixed ices has been measured. According to the P. Sigmund¡¦s model [1], if the projectiles with the same beam energy, then heavier ion will generate more sputtered particles. It turned out that in this measurement the heavier incident ion produced stronger light intensity, which should be proportional to sputtered particles. The optical emissions produce by ion species can be classified two categories: (a) Light emissions of hydrogen molecular spectroscopy are generated by hydrogen molecular ion species bombarding mixed ices with water. (b) Light emissions of atomic transitions are produced by projectiles of He+¡BN+¡BH2O+¡BN2+, and Ar+. We also measured the variation of light emissions dependent on different incident angles. It indicates that the iced water has some characteristics of crystal. The experiment of ion interaction with mixed ices can be used to simulate conditions occurred in the astrophysics [2, 3]. References: 1. P. Sigmund, Phys. Rev. 184 (1969) 383. 2. M.H. Moore , R.L. Hudson , P.A. Gerakines , ¡§Mid- and far-infrared spectroscopic studies of the influence of temperature, ultraviolet photolysis and ion irradiation on cosmic-type ices¡¨ , Spectrochimica Acta Part A , 57 , 843-858 (2001). 3. R.A. Baragiola , R.A. Vidal , W. Svendsen , J. Schou , M. Shi , D.A. Bahr , C.L. Atteberrry , ¡§Sputtering of water ice¡¨ , NIMB , 209 , 294-303 (2003)
Hsu Stephen
Ip Wing
Lee Chaohong
Liu Shujuan
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