نتایج جستجو برای: tm bands
تعداد نتایج: 66781 فیلتر نتایج به سال:
دو فسفرcaso4:dy وcaso4:tm به دلیل حساسیت بالا، روش تهیه آسان و مقاومت شیمیایی خوب خود کاربرد وسیعی در دزیمتری تابش پیدا کردند. سپس محققان اثر ناخالصی های دیگر مانند pb،mn،ag و ...را بر روی پاسخ کریستال caso4:dy بررسی کرده اند. در پایان نامه مرجع [25] کریستال های caso4:dy,mn و caso4:tm,mn ساخته شده و خواص ترمولومینسانس و دزیمتری آن ها بررسی شده است. این پژوهش در ادامه کار مرجع [25] است. و به بر...
We use high-resolution angle-resolved photoemission spectroscopy (ARPES) and electronic structure calculations to study the electronic properties of rare-earth monoantimonides RSb (R = Y, Ce, Gd, Dy, Ho, Tm, Lu). The experimentally measured Fermi surface (FS) of RSb consists of at least two concentric hole pockets at the Γ point and two intersecting electron pockets at the X point. These data a...
On the potential of BaSO4:Mn for broadly tunable laser emission in the near infrared spectral region
Because of the strong electron-phonon coupling of the emitting 3d orbitals in transition-metal (TM) ions, 3d systems exhibit luminescence with typically several hundred nm of spectral bandwidth. TM-ion-doped materials are, therefore, of high interest for applications as tunable and short-pulse lasers. Whereas many TM-ion-doped systems suffer from excited-state absorption (ESA), systems with a d...
Two designs of conical-beam array antennas are presented for different fifth-generation applications. They based on slotted cylindrical waveguides and a travelling-wave topology, where the waveguide is used to progressively excite cross-slot array. A total 384 cross-slots, formed by transversal longitudinal slots, grouped in rings eight equally-spaced cross-slots. The propagation TM <sub xmlns:...
The discovery of MAX phase borides has added a new dimension for research in the materials science community. In this paper, first-principles study newly known Zr2AB2 (A = In, Tl) been carried out. estimated lattice constants and volumes unit cell are found to be consistent with previous study. dynamical mechanical stability titled compounds have checked. Fundamental insights into stiffness con...
A new analytical approach to optimize the thicknesses of a two-layer absorbing structure constituted by graphene-based composite and polymer dielectric spacer backed metallic layer acting as perfect electric conductor (PEC) is proposed. The lossy sheet made an epoxy-based vinyl ester resin filled with graphene nanoplatelets (GNPs) characterized known frequency spectra complex permittivity. opti...
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