نتایج جستجو برای: alpha particle spectrometer
تعداد نتایج: 394145 فیلتر نتایج به سال:
با بکارگیری محلول خورش شامل پتاس، اتیلن دیامین، متانول، اتانول و آب(pemew) ، به همراه بهبود شرایط خورش الکتروشیمیایی ، می توان توسط آشکار ساز ردپای هسته ای از نوع پلی کربنات لگزان ، طیف نگاری آلفا در بازه انرژی 8/0 تا mev 2/5 انجام داد. این طیف نگاری بر اساس توزیع قطر ردپاها در انرژی های مختلف و دارای پاسخی تخت در بازه مذکور می باشد. بر اساس این نوع طیف نگاری، یک سیستم اسپکترومتر آلفا طراحی گرد...
The uptake of H2SO4 and CH3SO3H onto particles composed of water and sulfuric acid was studied in a laminar flow reactor at atmospheric pressure. Their first-order gas-phase loss rate coefficients were determined using a chemical ionization mass spectrometer. Relative humidity was varied from 6% to 97% at 295-297.5 K. The mass accommodation coefficient, alpha, was found to be close to unity for...
Abstract The proton-boron aneutronic fusion reaction has numerous potential applications varying from controlled nuclear reactor to broad-energy spectrum α-particle source, as well uses in medicine, where it can serve a source for radioisotope production, or directly proton boron capture therapy. However, and its by-products should be investigated extensively provide stable secondary ion source...
[1] Complete sets of mineral abundances for relatively unaltered volcanic or volcaniclastic rocks in Gusev Crater have been determined by modeling Mössbauer subspectral areas as mineral weight percentages, and combining those percentages with the proportions of iron-free minerals not detected by Mössbauer (normative plagioclase, apatite, and chromite, as calculated from Alpha Particle X-Ray Spe...
We are developing a miniature neutron-alpha activation spectrometer for in-situ analysis of chem-bio samples, including rocks, fines, ices, and drill cores, suitable for a lander or Rover platform for Mars or outer-planet missions. In the neutron-activation mode, penetrating analysis will be performed of the whole sample using a y spectrometer and in the ex-activation mode, the sample surface w...
The 12C(6Li, d)160 reaction has been studied at E ( ~ L i ) = 90.2 MeV with a magnetic spectrometer. Spectra up to E x ~ 30 MeV in 160 have been obtained and decay line widths, F~ .. . . have been extracted for broad levels. Known a-cluster states ( J " = 2 +, E x = 6.9 MeV; J ~ = 4 +, E x = 10.35 MeV) are preferentially populated and exhibit sharply forward peaked angular distributions in cont...
We discuss a model of dark matter consisting high energy anti-electron-neutrinos with leptonic force, which is produced by the conserved charge gℓ associated Lee–Yang’s U1 gauge symmetry. Based on particle-cosmology for early universe, neutrino (HEN) assumes that neutron decay processes, n→p++e−+ν¯e, dominate epoch after creation, collision and confinement processes quarks antiquarks in beginni...
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