Isobaric charge-exchange reactions induced by beams of 112Sn have been investigated at the GSI facilities using the fragment separator FRS. The high-resolving power of this spectrometer makes it ...possible to obtain the isobaric charge-exchange cross sections with an accuracy of 3% and to separate quasi-elastic and inelastic contributions in the missing-energy spectra, in which the inelastic component is associated to the in-medium excitation of baryonic resonances such as the \(\Delta\) resonance. We report on the results obtained for the (p,n) and (n,p) channels excited by using different targets that cover a large range in neutron excess.
We measured the reaction cross sections of the two-neutron halo nucleus 11 Li with solid hydrogen and carbon targets at around 31 and 41 MeV/nucleon. The neutron density distribution of 11 Li was ...deduced for the first time by the Glauber model calculation based on the optical limit approximation. The uncertainty of the matter density of 11 Li was improved, compared with earlier measurements. The present root-mean-square radius of the proton distribution agrees with the previous one derived from an optical isotope shift measurement. The present root-mean-square radii reproduce theoretical calculations by the tensor optimized shell model by assuming core excitation. This consistency suggests the possibility that 9 Li in 11 Li is excited and the disappearance of the N=8 shell gap of 11 Li is caused by correlations originating from the nucleon force, such as the tensor and the pairing.
Hemolytic and antifungal activities of partial acid hydrolysates of dioscin and dioscinin were compared. In general, these activities were proportional to the number of sugar residues and those ...derivatives having branched sugar chains showed higher activities than those with straight chains. The 17-hydroxyl group of the dioscinin derivatives reduced both biological activities.
For coherent detection using multi-level modulation formats, we demonstrated small responsivity imbalance of the InP-based p-i-n photodiode array monolithically integrated with the 90° hybrid ...consisting of 2 × 4 and 2 × 2 multimode interference structures and a 45° phase shifter. Responsivity imbalance of the In-phase and Quadrature channels was less than ±0.2 dB over the C-band by the adoption of the asymmetric waveguide phase shifter which functions as the 45° phase shifter, and its good reproducibility was indicated from the standard deviation for each wafer. Furthermore, excellent common mode rejection ratio below -25 dB was also confirmed from the coherent receiver with this integrated device. These results prove that this structure is very useful for stable manufacturability of the 90° hybrid.
A compact 100G coherent receiver using InP-based 90° hybrid integrated with photodiodes is reported. The package body size, at 13.6 × 25.2 × 5.5 mm, is the smallest ever reported. The device ...demonstrates bandwidth of 24 GHz and responsivity of 64 mA/W at 1550 nm. 128 Gbit/s DP-QPSK transmission tests have been successfully conducted.
This paper proposes a method of analyzing the three‐dimensional magnetic field of a system containing coil currents and magnetic substances using virtual currents. Various methods have been presented ...for analysis of a three‐dimensional static field in an open boundary space; however, in a large‐scale problem, the computational size easily exceeds the acceptable limit of computing time and machine capacity. The basic idea of the proposed method is to divide the whole region into interior and exterior regions with an artificial boundary and to substitute virtual currents for source currents and magnetic substances within the boundary. The use of virtual currents reduces the number of elements to be analyzed and shortens computing time while maintaining accuracy of analysis. In this paper, a method of determining virtual current is proposed and principal parameters of virtual currents that affect accuracy of analysis are examined. The conditions under which the virtual current method can be applied are examined through analysis of errors introduced by the virtual current method. This method has been applied to analyze magnetic shielding of a magnet for magnetic resonance imaging. This example proves that the proposed method is effective in reducing the scale of analysis and computing time.
