Superfluid-Mott Insulator Transition of Spin-1 Bosons in an Optical Lattice

We have studied superfluid-Mott insulating transition of spin-1 bosons interacting antiferromagnetically in an optical lattice. We have obtained the zero-temperature phase diagram by a mean-field approximation and have found that the superfluid phase is to be a polar state as a usual trapped spin-1 Bose gas. More interestingly, we have found that the Mott-insulating phase is strongly stabilized only when the number of atoms per site is even.Comment: 9 pages, 1 figur

A Temperature Responsive Polysaccharide Derivative in Aqueous Solution : Amylose Ethyl Carbamates

Shunji Kimura, Ryotaro Kochi, Shinichi Kitamura, and Ken Terao. A Temperature Responsive Polysaccharide Derivative in Aqueous Solution: Amylose Ethyl Carbamates. ACS Applied Polymer Materials, 2(6), 2426-2433, 2020. Copyright © 2020, American Chemical Society. https://doi.org/10.1021/acsapm.0c00366

STUDIES ON THE CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE A;\lD SULFATE FIXED TO THE SOIL IN THE MINERAL SPRING DISTRICTS (VIII) MATSUZAKI, TOGO AND ASOZU HOT SPRINGS, TOTTORI PREFECTURE, JAPAN

In Matsuzaki, Togo and Asozu Hot Springs which issue around the Pond Togo, the chloride and sulfate content and water temperatures of well waters and the amount of chloride and sufate fixed to the soil were determined with samples collected from various parts of the thermal spring districts and its neighborhood. The chloride and sulfate content and water temperatures of the well water samples collected from the thermal spring districts were higher than those from its neighbourhood, but for the amounts of chloride and sulfate fixed to the soil, no difference was detected. As the existence of other sources which would supply the chloride, sulfate and heat to the water is not expected, the difference in the chloride and sulfate content and water temperatures of well waters, between the samples collected from the thermal spring districts and its neighbourhood, seems to be due to the effects of thermal springs

Therapeutic Effect of Anti-TNF-α Antibody and Levofloxacin(LVFX)in a Mouse Model of Enterohemorrhagic Escherichia coli O157 Infection

マウスに腸管出血性大腸菌O157を感染させ、抗TNF-α抗体投与による感染防御効果を調べた。抗TNF-α抗体単独投与群では感染による症状の発現及び組織学的な変化は観察されなかったが、糞便中に少量のO157が証明された。本抗体にLVFXを併用した場合には糞便中のO157は完全に除去されたので、両者の併用により良好な治療結果が得られると考える

Design report of the KISS-II facility for exploring the origin of uranium

One of the critical longstanding issues in nuclear physics is the origin of the heavy elements such as platinum and uranium. The r-process hypothesis is generally supported as the process through which heavy elements are formed via explosive rapid neutron capture. Many of the nuclei involved in heavy-element synthesis are unidentified, short-lived, neutron-rich nuclei, and experimental data on their masses, half-lives, excited states, decay modes, and reaction rates with neutron etc., are incredibly scarce. The ultimate goal is to understand the origin of uranium. The nuclei along the pathway to uranium in the r-process are in "Terra Incognita". In principle, as many of these nuclides have more neutrons than 238U, this region is inaccessible via the in-flight fragmentation reactions and in-flight fission reactions used at the present major facilities worldwide. Therefore, the multi-nucleon transfer (MNT) reaction, which has been studied at the KEK Isotope Separation System (KISS), is attracting attention. However, in contrast to in-flight fission and fragmentation, the nuclei produced by the MNT reaction have characteristic kinematics with broad angular distribution and relatively low energies which makes them non-amenable to in-flight separation techniques. KISS-II would be the first facility to effectively connect production, separation, and analysis of nuclides along the r-process path leading to uranium. This will be accomplished by the use of a large solenoid to collect MNT products while rejecting the intense primary beam, a large helium gas catcher to thermalize the MNT products, and an MRTOF mass spectrograph to perform mass analysis and isobaric purification of subsequent spectroscopic studies. The facility will finally allow us to explore the neutron-rich nuclides in this Terra Incognita.Comment: Editors: Yutaka Watanabe and Yoshikazu Hirayam