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Several Media In The Atomic, Molecular Interactions And Physical Properties

Posted on:2003-12-17Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y SunFull Text:PDF
GTID:1110360092466703Subject:Atomic and molecular physics
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As we all boWn, the smictUres and physical PrOperties of any ldnd ofWr in the worid is very closely related to itS conStitUents consisted ofatoms' and molucules' codripeions and interactions. Hence, it is a mosttwrtan foundaInenul wie, Starting from theories and exPerimants, tostudy the intemehons between a pair of atoms and molecules andcormlative properties in a mediam. This just correspond with the chiefcareers I devoted to the perendal. In the way based the scientific andtecdrical talks on I presided at and panicipated in, the graduation theisincluded a p1entful thets in recent years wtll be divided into three parts fordepiction conxteniently and clearly, according to the content as fO1lowsf(l ) The study of shock comPression properties with the driXtiir- liquidCO and N, experimentally(2) The study of the phenomenon of excess heat produced by Deuteriurnatoms entering into the lattice of Titaluxn experimentally(3) The calcuJation for the electronic strUctUre and energy of Hydrogenatoms clUSter ffi.The mainstream in the first part of the paPer is tO exPOsure someexPerimental tecndques in high pressure and high temperatUr shockcompression physics, including by using a cryo-target cooled downcirculating steaxned N, to condense the well-proportioned mixed liquidsample from pure gas CO and N= with equal molar voIurne. Employingthe crucial component of the system: a phOtoelectric phase monitor, theentire sample phase change can be observed inStanly, so the reliability ofdata acqired from shocl copressed exPeriments are assured. The suitableliqulfied Nitrogen temPeratUre range for special cryo-cotalal electricdetectors, for measureing the tusmittal time of a shock wave, aredeveloPed, in order to create an optdrial precondition to test cryo-liquidtwxtUr more accUraely. And then, based on above, the high dynamicpressure tests controlled strickily to load upon drixed liquid samples havebeen cAned out on the tWo Stage ligh gas gUn, and five data shockedexperiment with first compression are obtalned within l0GPa~25GPaThey are all located in a narrow region,uPPer the decomposed POint ofcarbon monoxide but lowe than tha of nitrogen (roughiy 26GPa). Takeinto accoUn these data, the velocity relationShip betwen shock wave (D)and particle of post-shock wave (opcan be fitted by the followingformulatD = 2. l30 + l .1 l5u,Simultaneously, the Hugoniot (P-V) of the mixtUre is fitted too.ComPared with Anown D-% fOrmulae of each monomer,CO and N,,it iscleary that fltted curve of admixtUre juS located betWeen those ofmonomers and deviated to the one of CO, this indicates that shockcompressed characteristic of the adInixtUre is nOt a simple equaliZation toitS constitUents. The primmp fact about that is decomposed point of CO islower(rough1y l0GPa), it preceded to break down to atoms as C and O atthe saxne emlironment, thus separaed C clllSers consuxned a mass of heatenergy in the system and declined systimatic energy, and dominated theshock comPressed behaviors of the adInixtUr; While the decomPOsedPOint of the monomer N, is relative highertorobably 26GPa),therefore, itSimpact to the shock compressed behaviours of the admixtUre seemsweaker in that pressure region.For researching behaviours revealed in most products of condensedexplosives at CJ state Which is undissolvable each other, the technjques toprepare an iso-mole adInixtUre consisted ofwaer(H,O) and benzene(C,H,)has been developed and measured some useful enersetics parameters byusing emulsificaton at normality. Therefore, the shock compression area formixed liquid is expanded forcefulty.And then, according to exPerimental data and corresponding StaeVtheory the exP-6 POtenial Parameters of the for were fitted; Inthcoretical calculation, the modified fluld pedon vtheutionalStatStics method, i.e. ManSsori-Ced el d-Rasaiah- Stel l -Ross(M CRS R),was adoPt to calcu1ate the M'coNssion cbocteristics of...
Keywords/Search Tags:equation of state of matter, shock compression, cryotarget, calorimetry, excess heat, ionic crystal, hydrogen atomic cluster, variational calculation
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