Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Ca cast doubt on a doubly magic 
CaChen, S.*; Browne, F.*; Doornenbal, P.*; Lee, J.*; Obertelli, A.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Chazono, Yoshiki*; Hagen, G.*; Holt, J. D.*; et al.
Physics Letters B, 843, p.138025_1 - 138025_7, 2023/08
Times Cited Count：1 Percentile：59.27(Astronomy & Astrophysics)Gamma decays were observed in 
Ca and 
Ca following quasi-free one-proton knockout reactions from 
Sc. For Ca, a 
ray transition was measured to be 1456(12) keV, while for Ca an indication for a transition was observed at 1115(34) keV. Both transitions were tentatively assigned as the 
decays. A shell-model calculation in a wide model space with a marginally modified effective nucleon-nucleon interaction depicts excellent agreement with experiment for 
level energies, two-neutron separation energies, and reaction cross sections, corroborating the formation of a new nuclear shell above the N = 34 shell. Its constituents, the 
and 
orbitals, are almost degenerate. This degeneracy precludes the possibility for a doubly magic Ca and potentially drives the dripline of Ca isotopes to 
Ca or even beyond.
state of 
Al; Investigation on the neutron 
excitation across 
in the island of inversionXu, Z. Y.*; Heylen, H.*; Asahi, Koichiro*; Boulay, F.*; Daugas, J. M.*; de Groote, R. P.*; Gins, W.*; Kamalou, O.*; Koszor
s, 
.*; Lykiardopoupou, M.*; et al.
Physics Letters B, 782, p.619 - 626, 2018/07
Times Cited Count：7 Percentile：52.71(Astronomy & Astrophysics)no abstracts in English
Ueki, Yuji; Umemura, Tomonari*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Katakai, Akio; Tamada, Masao
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 58, 2007/02
In late years, the studies on monolithic columns, which consist of porous material with through-pore of a few micrometer dimensions, have been vigorously performed for rapid and high-resolution separations. Monolithic capillary columns for reversed-phase liquid chromatography were directly prepared by ray-induced polymerization of hexyl methacrylate (HMA) and ethylene dimethacrylate in the fused silica capillaries, 0.25 mm in inner diameter. High separation efficiency of the monolithic columns were realized when the columns were prepared in the condition of 10 kGy irradaiation, total monomer concentration of 20% inclusive 25% crosslinker. The produced HMA-based monolithic columns were composed of adhered polymer particles, 1 
m and less than in diameter. The pressure drop of column, this 200 mm long, was below 2.0 MPa at linear velocity of 1 mm s
. The height equivalent to a theoretical plate was approximately 30 m for the five kinds of alkylbenzenes.
Ueki, Yuji*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*; Katakai, Akio; Tamada, Masao
no journal, ,
The studies on monolith columns, which consist of polymer medium with through-pore (
m), have been vigorously performed to aim at rapid and high-resolution separation of organic materials. The monoliths are directly synthesized in fused silica capillaries by thermal polymerization. It is difficult to prepare the homogeneous monoliths by thermal polymerization, because of the heterogeneity of heat transfer and initiator dispersion. In the present paper, polymer monoliths were prepared by -rays irradiation. As a result, homogeneous monoliths, which composed of adhered particulate of polymer 1 m in diameter. The highest separation of the monolith column was obtained at 10 kGy irradiation when the total concentration of monomers and cross-linker were charged at 20 and 25%, respectively.
Ueki, Yuji; Katakai, Akio; Tamada, Masao; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*
no journal, ,
no abstracts in English
Umemura, Tomonari*; Wakita, Yoshinori*; Kojima, Norihisa*; Ueki, Yuji; Katakai, Akio; Tamada, Masao; Tsunoda, Kinichi*; Haraguchi, Hiroki*
no journal, ,
no abstracts in English
Ueki, Yuji; Sato, Harutomo*; Iwashita, Yoshikazu*; Hotta, Hiroki*; Odake, Tamao*; Tsunoda, Kinichi*; Umemura, Tomonari*
no journal, ,
no abstracts in English
Kataoka, Shoji; Tsunoda, Hiroki; Matsushima, Ryotatsu; Sato, Fuminori; Shirozu, Hidetomo
no journal, ,
Low Active Waste Treatment Development Facility (LWTF) in Tokai Reprocessing Plant (TRP) is a facility for treatment of low-radioactive liquid and solid wastes generated from the TRP. The liquid wastes treated in LWTF are concentrated low-radioactive liquid waste and phosphoric acid solution, and they are planned to be solidified with cement in our new equipment. The concentrated liquid wastes are separated into slurry and carbonate compounds by a nuclide separation equipment currently in LWTF and a nitrate decomposition equipment which is under development, and then the cement solidification will be carried out on each liquid waste. Currently, studying and designing for the introduction of the nitrate decomposition equipment and cement solidification equipment is in progress. In this paper, results of the cementation demonstration on simulated waste liquids of the carbonate, phosphoric acid and slurry are reported.
Tsunoda, Hiroki; Kataoka, Shoji; Takano, Masato; Sato, Fuminori
no journal, ,
The Low Active Waste Treatment Development Facility (LWTF) at the Tokai Reprocessing Plant (TRP) is a facility to treat low radioactive liquid and solid wastes generated from the reprocessing plant. The liquid wastes to be treated at the LWTF are low radioactive concentrated liquid waste and phosphate liquid waste, which are planned to be cemented solidified. The low radioactive concentrated liquid waste will be separated into slurry liquid waste and carbonate liquid waste by the existing nuclide separation facility and the newly constructed nitrate root decomposition facility, and then cement solidified. Currently, studies and designs are underway for the introduction of a nitrate root decomposition facility and a cement solidification facility. This report describes the results of full-scale kneading tests for cement solidification, which confirmed that the carbonate, slurry, and phosphate wastes hardened by the next day, did not generate floating water, and had sufficient compressive strength.
