Nuclear Data Sheets for A=126 Iimura, H.; Katakura, J.; Ohya, S.
Nuclear data sheets,
February 2022, 2022-02-00, Letnik:
180
Journal Article
Recenzirano
Evaluated nuclear structure and decay data are presented for 16 known A=126 nuclides (Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd). The A=126 mass chain was last evaluated by J. ...Katakura and K. Kitao, which was published in Nuclear Data Sheets 97, 765 (2002) (2002Ka66). In 2015, B. Singh evaluated the data of 126Rh, 126Pd and 126Ag. The current work is an update of these previous evaluations. Experimental data from new publications since 2002Ka66 have been incorporated. Even when no new publications appeared, some previous datasets have been modified for new β-decay Q values and conversion coefficients. Adopted values for levels and gammas are based on data of various decays and reactions. Inconsistencies and discrepancies have been noted.
Time-resolved photoconductivity measurements were carried out on single-wall carbon nanotube (SWNT) films at various temperatures. Photoconductivity excitation spectra show two clear peaks around 0.7 ...and 1.2 eV. Observed peaks in the spectra correspond to the optical absorption between symmetrical bands of semiconducting SWNTs. The analysis of this feature allows insight into the transport properties of semiconducting SWNTs. Signal profiles in the photoresponse at low temperatures depend strongly on the sample, while intensity of the photoresponse monotonously increases with a decrease in temperature for all samples. Photo-induced current for a sample decays rapidly after the laser pulse irradiation. For another sample, on the other hand, it decreases gradually and remains up to a few hundred nanoseconds, showing the existence of trapping sites in the nanotubes.
Various colonic motor activities are thought to mediate propulsion and mixing/absorption of colonic content. The Japanese traditional medicine daikenchuto (TU-100), which is widely used for ...postoperative ileus in Japan, accelerates colonic emptying in healthy humans. Hydroxy-α sanshool (HAS), a readily absorbable active ingredient of TU-100 and a KCNK3/KCNK9/KCNK18 blocker as well as TRPV1/TRPA1 agonist, has been investigated for its effects on colonic motility. Motility was evaluated by intraluminal pressure and video imaging of rat proximal colons in an organ bath. Distribution of KCNKs was investigated by RT-PCR, in situ hybridization, and immunohistochemistry. Current and membrane potential were evaluated with use of recombinant KCNK3- or KCNK9-expressing Xenopus oocytes and Chinese hamster ovary cells. Defecation frequency in rats was measured. HAS dose dependently induced strong propulsive "squeezing" motility, presumably as long-distance contraction (LDC). TRPV1/TRPA1 agonists induced different motility patterns. The effect of HAS was unaltered by TRPV1/TRPA1 antagonists and desensitization. Lidocaine (a nonselective KCNK blocker) and hydroxy-β sanshool (a geometrical isomer of HAS and KCNK3 blocker) also induced colonic motility as a rhythmic propagating ripple (RPR) and a LDC-like motion, respectively. HAS-induced "LDC," but not lidocaine-induced "RPR," was abrogated by a neuroleptic agent tetrodotoxin. KCNK3 and KCNK9 were located mainly in longitudinal smooth muscle cells and in neural cells in the myenteric plexus, respectively. Administration of HAS or TU-100 increased defecation frequency in normal and laparotomy rats. HAS may evoke strong LDC possibly via blockage of the neural KCNK9 channel in the colonic myenteric plexus.
We studied the two-step photon absorption (TSPA) process in InAs/GaAs quantum-dot superlattice (QDSL) solar cells. TSPA of subband-gap photons efficiently occurs when electrons are pumped from the ...valence band to the states above the inhomogeneously distributed fundamental states of QDSLs. The photoluminescence (PL)-excitation spectrum demonstrates an absorption edge attributed to the higher excited states of the QDSLs in between the InAs wetting layer states and the fundamental states of QDSLs. When the absorption edge of the excited state was resonantly excited, the superlinear excitation power dependence of the PL intensity demonstrated that the electron and hole created by the interband transition separately relax into QDSLs. Furthermore, time-resolved PL measurements demonstrated that the electron lifetime is extended by thereby inhibiting recombination with holes, enhancing the second subband-gap absorption.
A super-high sensitivity radon detector for water which works as a real-time monitor of the radon concentration in water for the Super-Kamiokande detector was developed. Super-high sensitivity was ...achieved through the utilization of the membrane degassifier module, in addition to factors such as large detector volume, high electrostatic collection voltage, and high-quality electronics. As a result of the calibration study, a sensitivity of 14.6±2.1(stat.+syst.) (counts/day)/(mBq/m
3) is achieved. The background level of the radon detector for water is 34.5±5.8(stat.) (counts/day). This corresponds to the detection limit of
0.7
mBq/m
3
in a one-day measurement.
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