[en] In the present work, the giant magnetoimpedance (GMI) effect of Ag/NiFe plated wire was investigated at room temperature. The value of the magnetoimpedance (Z(H)-Z(0))/Z(0) under H=90 Oe can reach about 40% at 50 kHz. With the increase of the field the magnetoimpedance (Z(H)-Z(0))/Z(0) reaches a peak. The peak-field H_P increases firstly with frequency f at low frequencies, and finally approaches its saturation value at frequencies f≥1 MHz. The maximum positive-magnetoimpedance (Z(H_P)-Z(0))/Z(0) also shows a peak, which is mainly due to the reactance change. The negative- magnetoreactance decreases with increasing frequency, resulting from the reduction of permeability. In contrast, with an increase of frequency, the negative-magnetoresistance undergoes a maximum, and then drops again. The increase of magnetoresistance can be attributed to the enhancement of skin effect with frequency. The occurrence of a maximum magnetoimpedance with increasing frequency is due to the competition between the enhancement of skin effect and the reduction of permeability. There exist two intersecting points of the frequency dependence of magnetoimpedance, magnetoresistance and magnetoreactance. Both intersecting frequencies increase with applied field. The giant magnetoimpedance effect in plated wires can be very large at a relative low frequency such as 50 kHz. This is correlated with the existence of the highly conductive Ag inner-core, which increases not only the effective conductivity but also the effective distance of the magnetic outer-layer NiFe from the axis of wire, reducing the effective critical frequency of skin effect

[en] Highlights: • The composite ceramics have much higher energy storage density than pure anti-ferroelectrics. • SPS process can suppress the diffusion behavior between the tetragonal and orthorhombic phases. • A high recoverable energy storage density of 6.40 J/cm"3 was obtained in the composite ceramics. - Abstract: Anti-ferroelectric composite ceramics of (Pb_0_._8_5_8Ba_0_._1La_0_._0_2Y_0_._0_0_8)(Zr_0_._6_5Sn_0_._3Ti_0_._0_5)O_3-(Pb_0_._9_7La_0_._0_2)(Zr_0_._9Sn_0_._0_5 Ti_0_._0_5)O_3 (PBLYZST-PLZST) have been fabricated by Spark Plasma Sintering (SPS) method. The effect of SPS process on phase structure, anti-ferroelectric and energy storage properties of the composites has been investigated in detail. The X-ray diffraction, field emission scanning electron microscopy and energy-dispersive spectrometry analysis illustrate that the composites are composed of tetragonal perovskite, orthorhombic perovskite and small amount of non-functional pyrochlore phases. Compared with conventional solid-state sintering (CS) process, SPS process is helpful to suppress the diffusion behavior between the tetragonal PBLYZST and orthorhombic PLZST phases, and thereby improve the contribution of PLZST phase to the FE-to-AFE phase transition electric field (E_A) of the composites. As a result, the SPS composite ceramics possess a considerable E_A of 162 kV/cm and a high recoverable energy storage density valued 6.40 J/cm"3 which is 1.75 J/cm"3 higher than that of the CS samples and about 2.3 times as that of the PBLYZST ceramics

[en] We performed in situ compression of interstitial-free steel nanoblades using transmission electron microscopy (TEM) in order to determine the relation between the evolution of the dislocation structures and the flow stress during deformation. In the early stage of deformation, the sample deforms elastically with a few dislocation motions. The dislocation multiplication processes have been discussed. Remarkable plastic softening with increasing dislocation density is observed after the maximum stress is reached, which can be understood as a situation in which the dislocation density is the dominant factor affecting the softening based on the Johnston–Gilman model

[en] A special algorithm of the event start time of BESIII is presented. The principle and the code design are described, the segment finding and the linear fitting are used in this code by the MDC geometric information and hit information. At last event start time is calculated. The tuning and checking have been done carefully by the MC data samples, the results show that the code and the algorithm are reliable. (authors)

[en] Highlights: • Design and synthesis of NaYF₄:Er,Yb/Bi₂MoO₆ based on upconversion. • NaYF₄:Er,Yb/Bi₂MoO₆ nanocomposite was prepared for the first time. • Core–shell structure benefits the properties. • Upconversion contributed to the enhanced photocatalytic activity. • Helps to understand the functionality of new type photocatalysts. - Abstract: NaYF₄:Er,Yb/Bi₂MoO₆ core/shell nanocomposite was designed and prepared for the first time based on upconversion. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution TEM (HRTEM), energy dispersive X-ray spectroscopy (EDS) and diffuse reflectance spectra (DRS). The results revealed that the as-synthesized NaYF₄:Er,Yb/Bi₂MoO₆ consisted of spheres with a core diameter of about 26 nm and a shell diameter of around 6 nm. The core was upconversion illuminant NaYF₄:Er,Yb and the shell was Bi₂MoO₆ around the core, which was confirmed by EDS. The NaYF₄:Er,Yb/Bi₂MoO₆ exhibited higher photocatalytic activity for the photodecomposition of Rhodamine B (RhB) under the irradiation of Xe lamp and green light emitting diode (g-LED). The mechanism of the high photocatalytic activity was discussed by photoluminescence spectra (PL), which is mainly attributed to upconversion of NaYF₄:Er,Yb in the NaYF₄:Er,Yb/Bi₂MoO₆ nanocomposite and the core–shell structure

[en] We have calculated highly excited fine-structure energy levels and their autoionizing widths for the 3pns ³P₁(n=9–33), 3pns ¹P₁(n=9–27), 3pnd ³D₁(n=9–35), 3pnd ³P₁(n=8–26), 3pnd ¹P₁(n=8–26), 3dnp³D₁(n=6,8–29), 3dnp³P₁(n=6,8–29), 3dnp ¹P₁(n=6,8–28), 3dnf ³D₁(n=7–28), 3dnf ³P₁(n=7–27), and 3dnf ¹P₁(n=7–27) states of the magnesium-like ion Ti XI and for the 3pns ³P₁(n=10–35), 3pns ¹P₁(n=10–25), 3pnd ³D₁(n=10–35),3pnd ³P₁(n=10–25),3pnd ¹P₁(n=10–24),3dnp ³D₁(n=7,9–31),3dnp ³P₁(n=7,9–31),3dnp ¹P₁(n=7,9–28),3dnf ³D₁(n=9–30),3dnf ³P₁(n=9–28), and 3dnf ¹P₁(n=9–28) states of the magnesium-like ion Fe XV. The calculations are based on the relativistic Breit–Pauli R-matrix approximation combined with the QB method [L. Quigley, K. Berrington, J. Pelan, Comput. Phys. Commun. 144 (1998) 225]. We report many previously unpublished energy values and autoionizing widths for these magnesium-like ions.

[en] Graphical abstract: - Highlights: • ·OH trap and hole sink were involved to investigate the active radicals. • Holes play a more important role in the degradation of RhB. • The ·OH were related to the decomposition of phenol. • The ·O₂-played a leading role in the photodegradation of phenol. • Blue LED is competitive and promising alternative for the future application. - Abstract: Bi₂MoO₆ has been reported as a promising photocatalyst in wastewater treatment. The active radicals generated over the Bi₂MoO₆ during the photocatalytic process were thought to be hydroxyl radical (·OH) but have not been proved. Herein, Bi₂MoO₆ with nanoplate like morphology was synthesized and its photocatalytic performances in the degradation of rhodamine B (RhB) and phenol as colored and colorless model pollutants respectively were evaluated under the irradiation of blue light emitting diode (LED). The tert-butyl alcohol (TBA) as a ·OH trap and ethylene diamine tetraacetic acid (EDTA) as a hole sink were involved to investigate the main active groups that are generated on Bi₂MoO₆ and function during the photodegradation of RhB and phenol. In addition, it is a competitive and promising alternative plan to use blue LED as light source for the future practical application in environmental remediation

[en] The passive radon monitor constructed by a solid state nuclear track detector has been used for the measurement of the radon concentration in residential houses in China Institute of Atomic Energy (CIAE) region. The sampling points have been selected for different floors and different kinds of building materials of a few typical style residential houses. Firstly, the variations of the radon concentrations sampled in one room, but located at different distances to the window, have been measured. Then, a point near a central lamp has been selected as a routine sampling point. The indoor radon concentration measured in a radomly selected samples of 80 CIAE houses have been found to range from about 16 Bq/m³ to 209 Bq/m³ with a arithmetic mean value of 49 Bq/m³. The annual effective dose equivalent may be estimated about 1.4 mSv. (Author)

[en] In the chemical control of AP1000 unit, the requirements for suspended solids in the normal operation of the first and second loop system are strict. Such as, the first loop coolant system is less than or equal to 50 × 10^-9, the main feedwater system is less than or equal to 10 × 10^-9. Using traditional Weight method, there are some problems such as large sample volume, long analysis time, high dose for personnel and poor stability of analysis. In this paper, a new method for the determination of trace suspended solids is researched by confirming the main components of suspended solids in nuclear power plant primary and secondary loop coolant, Filter Colorimetric method. That is, filter 1-2 L sample volume, the content of suspended solids was obtained by comparing the filter membrane with the standard color chart. The method is semi-quantitative, simple, accurate and convenient. The monitoring requirements of trace suspended solids in the primary and secondary circuits of AP1000 nuclear power plant can be met. (authors)

[en] Harshaw6600 is a more widely used thermoluminescent dosimeter system currently in China. A series of parameters is set inside of the system, to calculate the dose data and to ensure the accuracy of calculation. The definitions of these parameters are briefly introduced. Its principle of dose calculation is analyzed, and the accuracy of dose calculation is verified. Some suggestions on dose calculation for radiation of low energy ray are provided. (authors)