Study of quasielastic barrier distributions as a step towards the synthesis of superheavy elements with hot fusion reactions

Tanaka, Taiki*; Morita, Kosuke*; Morimoto, Koji*; Kaji, Daiya*; Haba, Hiromitsu*; Boll, R. A.*; Brewer, N. T.*; Van Cleve, S.*; Dean, D. J.*; Ishizawa, Satoshi*; et al.

Physical Review Letters, 124(5), p.052502_1 - 052502_6, 2020/02

https://doi.org/10.1103/PhysRevLett.124.052502

Review of even element super-heavy nuclei and search for element 120

Hofmann, S.*; Heinz, S.*; Mann, R.*; Maurer, J.*; Mnzenberg, G.*; Antalic, S.*; Barth, W.*; Burkhard, K. G.*; Dahl, L.*; Eberhardt, K.*; et al.

European Physical Journal A, 52(6), p.180_1 - 180_34, 2016/06

https://doi.org/10.1140/epja/i2016-16180-4

The Effect of alkyl substituents on actinide and lanthanide extraction by diglycolamide compounds

Sasaki, Yuji; Sugo, Yumi; Morita, Keisuke; Nash, K.*; Nash, K. L.*

Solvent Extraction and Ion Exchange, 33(7), p.625 - 641, 2015/10

https://doi.org/10.1080/07366299.2015.1087209

The effect of alkyl substituents at amidic N atoms in diglycolamide (DGA) compounds on solvent extraction was investigated. The solubility in water and n-dodecane, loading capacity, and distribution ratio (D) of lanthanides and actinides for various DGA compounds were monitored. DGA derivatives with short alkyl chains, for example methyl and ethyl groups, are highly water soluble, while DGA derivatives with long alkyl chains are highly soluble in n-dodecane. The loading capacity correlats with their alkyl chain lengths. The results of masking effect and solubility tests indicate that TEDGA(tetraethyl-diglycolamide) is the best actinide masking agent among the water-soluble DGA derivatives. Actinide extractions were performed using ten DGA compounds in six diluents (nitrobenzene, 1,2-dichloroethane, 1-octanol, chloroform, toluene, and n-dodecane), in which it was observed that DGA derivatives with shorter alkyl chains show higher D values.

Proton acceleration due to anisotropic coulomb explosion of a double-layer target irradiated by an intense laser pulse

Morita, Toshimasa; Bulanov, S. V.; Esirkepov, T. Z.; Koga, J. K.; Kando, Masaki

Journal of the Physical Society of Japan, 81(2), p.024501_1 - 024501_6, 2012/02

https://doi.org/10.1143/JPSJ.81.024501

It is shown analytically and by three-dimensional particle-in-cell simulations that higher energy protons are obtained by using material with a high charge-to-mass ratio in the first layer of a double-layer target, because a strong Coulomb explosion occurs in such a material. As a result, the protons keep accelerating for a longer time. Using the optimal conditions for the target, it is shown that high energy and high quality protons can be generated.

Effects of the laser pulse irradiation point on a double layer target on the accelerated ion beam parameters

Morita, Toshimasa; Bulanov, S. V.; Esirkepov, T. Z.; Koga, J. K.; Yamagiwa, Mitsuru

AIP Conference Proceedings 1153, p.103 - 112, 2009/07

https://doi.org/10.1063/1.3204513

In proton acceleration by a laser pulse obliquely incident on a double layer target, it is shown by PIC simulations that the energy spread of the generated protons can be reduced by irradiating the laser pulse on to the off-center position of the target. This provides a way to control the proton energy spectrum. The high energy protons are found to come from an area shifted from the initial target center towards the propagation direction of the laser pulse. We show that the high energy protons with much smaller energy spread can be obtained by appropriately adjusting the size and position of the second proton layer.

The Effect of laser pulse incidence angle on the proton acceleration from a double-layer target

Morita, Toshimasa; Esirkepov, T. Z.; Koga, J. K.; Yamagiwa, Mitsuru; Bulanov, S. V.

Plasma Physics and Controlled Fusion, 51(2), p.024002_1 - 024002_18, 2009/02

https://doi.org/10.1088/0741-3335/51/2/024002

We investigate theoretically and with three dimensional particle-in-cell simulations high quality laser proton acceleration for the oblique incidence of a high intensity laser pulse on a double-layer target. The double-layer target is composed of a high-Z ion layer coated by a thin and narrow hydrogen patch. The highest proton energy gain is achieved at a certain incidence angle at which the fast proton maximum energy is much greater than the case of normal incidence. The fast protons form a tilted bunch which propagates at some angle with the respect to the normal of the target surface, as determined by the proton energy and the incidence angle.

Tunable high-energy ion source via oblique laser pulse incident on a double-layer target

Morita, Toshimasa; Esirkepov, T. Z.; Bulanov, S. V.; Koga, J. K.; Yamagiwa, Mitsuru

Physical Review Letters, 100(14), p.145001_1 - 145001_4, 2008/04

https://doi.org/10.1103/PhysRevLett.100.145001

The laser-driven acceleration of high quality proton beams from a double-layer target, comprised of a high-Z ion layer and a thin disk of hydrogen, is investigated with three-dimensional particle-in-cell simulations in the case of oblique incidence of a laser pulse. It is shown that the proton beam energy reaches its maximum at a certain incidence angle of the laser pulse, where it can be much greater than the energy at normal incidence. The proton beam propagates at some angle with respect to the target surface normal, as determined by the proton energy and the incidence angle.

Evidence for a narrow = +1 Baryon resonance in photoproduction from the neutron

Nakano, Takashi*; Ahn, D. S.*; Ahn, J. K.*; Akimune, Hidetoshi*; Asano, Yoshihiro; Chang, W. C.*; Date, S.*; Ejiri, Hiroyasu*; Fujimura, Hisako*; Fujiwara, Mamoru; et al.

Physical Review Letters, 91(1), p.012002_1 - 012002_4, 2003/07

https://doi.org/10.1103/PhysRevLett.91.012002

no abstracts in English

In vivo release of cisplatin from a needle-type copolymer formulation implanted in rat kidney

Yoshida, Masaru; Asano, Masaharu; Morita, Y.*; Kaetsu, Isao; Imai, K.*; Mashimo, Toru*; Yuasa, Hisako*; Yamanaka, Hidetoshi*; *; Suzuki, K.*

Biomaterials, 10, p.16 - 22, 1989/01

https://doi.org/10.1016/0142-9612(89)90004-5

no abstracts in English

Proton generation from a metal thin foil irradiated with a high intensity ultra-short pulse laser

Sagisaka, Akito; Yogo, Akifumi; Daido, Hiroyuki; Fukumi, Atsushi*; Li, Z.*; Ogura, Koichi; Takai, Mamiko; Orimo, Satoshi; Hayashi, Yukio; Mori, Michiaki; et al.

no journal, , 

no abstracts in English