Mass loss from red giants - Infrared spectroscopyĪ discussion is presented of IR spectroscopy, particularly high-resolution spectroscopy in the approximately 1-20 micron band, as it impacts the study of circumstellar envelopes. This technique can be used to assess the oxidative reactivity of carbonaceous solids where higher temperature reactivity indicates greater structural order. USDA-ARS?s Scientific Manuscript databaseīiochar from the thermochemical conversion of biomass was evaluated by Temperature Programmed Oxidation (TPO) coupled with mass spectroscopy. Implications of this measurement are considered for the rp process.Įvaluation of biochars by temperature programmed oxidation/ mass spectroscopy Results are compared with other measurements, with Audi-Wapstra systematics, and with predictions of mass formulas. Combining this result with the adopted mass excess of the daughter 80Sr gives a mass excess for 80Y of â©¾-61 376(83) keV. The QEC value of 80Y has been measured by Î²-Î³ coincidence spectroscopy to be â©❨929(83) keV. Mass measurement of 80Y by Î²-Î³ coincidence spectroscopyīarton, C. Implications for rp-process simulations are considered. Combing this result with the adopted mass excess of the daughter 80Sr gives a mass excess for 80Y of â‰¥ -61376(83) keV. The QEC value of 80Y has been measured by Î²-Î³ coincidence spectroscopy to be â‰¥8929(83) keV. Mass Measurement of 80Y by Î²-Î³ Coincidence Spectroscopyīrenner, D. PERFORMING ORGANIZATION NAME(S) AND.200 words) The application of resonance ionization mass spectroscopy (RIMS) to nuclear forensics involves the use of lasers to selectively ionize Lau June 2015 Thesis.IONIZATION MASS SPECTROSCOPY ANALYSIS IN NUCLEAR FORENSICS 5. OF A CONTINUOUS WAVE LASER FOR RESONANCE IONIZATION MASS SPECTROSCOPY ANALYSIS IN NUCLEAR FORENSICS by Sunny G. The possibilities are considered for using this mass-spectrometer for laser spectroscopy of nuclei far off-stability.Ĭharacterization of a Continuous Wave Laser for Resonance Ionization Mass Spectroscopy Analysis in Nuclear Forensics It should be regarded as an alternative of the classical ISOL technique. The experimental program of future investigations using the technique of a gas catcher is discussed.

The Î±-decay of the superheavy nuclides or spontaneous fission products will be detected with a silicon 192 strips detector. For this purpose a hot catcher, based on a graphite stopper, is constructed. The first experiments on mass-measurements for 112 and 114 elements will be performed in the upcoming 2010. The mass-spectrometer is connected to the U-400M cyclotron of the Flerov Laboratory for Nuclear Reactions (FLNR) JINR, Dubna. We report the present status of the mass-spectrometer MASHA ( Mass-Analyzer of Supper Heavy Atoms) designed for determination of the masses of superheavy elements. Using these yields, first-order calculations predict that EPI-SMS will yield high signal-to-noise at altitudes greater than 10 km with both electrostatic and Hall thrusters.Īpplication of the mass-spectrometer MASHA for mass-spectrometry and laser- spectroscopy Approximately 1 keV Xe+ has been studied and proven to generate high sputtering yields in metallic substrates. EPI-SMS operation has three high-level requirements: EP system, mass spectrometer, and altitude of about 10 km. The sputtering properties of EP exhaust can be used to determine detailed surface composition of atmosphereless bodies by electric propulsion induced secondary mass spectroscopy (EPI-SMS). Using a mass spectrometer, the sputtered material can be determined. The energies of the Xe+ are sufficient to cause sputtering interactions, which eject material from the top microns of a targeted surface. Recently, missions such as Deep Space 1 and Dawn have utilized electric propulsion (EP) accelerated, high-energy collimated beam of Xe+ ions to propel deep space missions to their target bodies. However, neither provides direct measurement that can unambiguously constrain the global surface composition and most importantly, the nature of trace composition and second-phase impurities. Historically, most compositional analysis of small body surfaces has been done remotely by analyzing reflection or nuclear spectra. Electric Propulsion Induced Secondary Mass SpectroscopyĪ document highlights a means to complement remote spectroscopy while also providing in situ surface samples without a landed system.

Element molar mmass 33.5