Results 31 to 40 of about 2,000,871 (360)
First-principles calculations of the diffusion of atomic oxygen in nickel: thermal expansion contribution [PDF]
, 2007 Within the framework of density functional theory using the projector augmented-wave (PAW) method, we present some energetic properties of atomic oxygen interstitials in crystalline Ni, i.e.
Amarouche, Mohand +2 more
core +2 more sources
Scientific Reports, 2022 Based on the standards of ISO11704-2018 and ASTM D7283-17, a method for simultaneous determination of gross alpha and gross beta activity concentrations in water by liquid scintillation counting (LSC) was established, which can be applied to various ...
Xiaoyun Li +6 more
doaj +1 more source
Atomic Scale Sliding and Rolling of Carbon Nanotubes [PDF]
, 1999 A carbon nanotube is an ideal object for understanding the atomic scale aspects of interface interaction and friction. Using molecular statics and dynamics methods different types of motion of nanotubes on a graphite surface are investigated.
A. Buldum +16 more
core +3 more sources
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
Cavity cooling of many atoms [PDF]
Phys. Rev. Lett. 118, 183601 (2017), 2017 We demonstrate cavity cooling of all motional degrees of freedom of an atomic ensemble using light that is far detuned from the atomic transitions by several gigahertz. The cooling is achieved by cavity-induced frequency-dependent asymmetric enhancement of the atomic emission spectrum, thereby extracting thermal kinetic energy from the atomic system ...
arxiv +1 more source
Adsorption of Nd3+ by Carboxylated Graphene Oxide
He huaxue yu fangshe huaxue, 2022 Graphene oxide(GO) has attracted extensive attention in the field of water environment treatment due to its large specific surface area and rich oxygen-containing functional groups. Graphene oxide was modified by carboxylation. The effects of solution pH,
TAO Wu-qing +4 more
doaj +1 more source
Photonuclear reaction study with the (p, γ) resonance γ-source [PDF]
EPJ Web of Conferences, 2020 The (p, γ) resonance is a good way to produce monoenergetic γ rays. It becomes an important tool for studying photonuclear reactions. In this work, 13C(p, γ)14N resonance is studied to produce 9.17 MeV γ ray using the 2 × 1.7 MV tandem accelerator at ...
He Chuangye +9 more
doaj +1 more source
Retrieval of electron-atom scattering cross sections from laser-induced electron rescattering of atomic negative ions in intense laser fields [PDF]
, 2007 We investigated the two-dimensional electron momentum distributions of atomic negative ions in an intense laser field by solving the time-dependent Schrodinger equation (TDSE) and using the first- and 2nd-order strong-field approximations (SFA).
Chen, Zhangjin +4 more
core +4 more sources
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Background Ultrasonography (US) and 99mTechnetium‐sestamibi scintigraphy (99mTc‐MIBI) are currently first‐line imaging modalities to localize parathyroid adenomas with sensitivities of 80% and 84%, respectively. Therefore, finding other modalities to further improve the diagnostic accuracy for preoperative localization is critically needed ...
Fangyi Liu +7 more
wiley +1 more source