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Journal Articles

$$alpha$$-decay study of $$^{182,184}$$Tl

Van Beveren, C.*; Andreyev, A.; Barzakh, A. E.*; Cocolios, T. E.*; de Groote, R. P.*; Fedorov, D.*; Fedosseev, V. N.*; Ferrer, R.*; Ghys, L.*; Huyse, M.*; et al.

Journal of Physics G; Nuclear and Particle Physics, 43(2), p.025102_1 - 025102_22, 2016/02

 Times Cited Count:11 Percentile:71(Physics, Nuclear)

Journal Articles

Neutrinos in core-collapse supernovae and nucleosynthesis

Kajino, Toshitaka*; Mathews, G. J.*; Hayakawa, Takehito

Journal of Physics G; Nuclear and Particle Physics, 41(4), p.044007_1 - 044007_34, 2014/04

 Times Cited Count:17 Percentile:77.63(Physics, Nuclear)

Neutrino interactions are a key component of the mechanism for supernova explosions. They also play an important role in the associated nucleosynthesis. Nevertheless, a number of issues remain to be resolved. In this review we summarize research by our group and others on some of these issues. Much effort is now invested in understanding the transport of neutrinos from the core and the role of neutrino heated convection in the outer envelopes. In addition to the neutrino transport issues, we review some current topics in neutrino induced nucleosynthesis (the neutrino and p processes). We review some current issues regarding the synthesis of the neutirno-process isotopes $$^{180}$$Ta and $$^{138}$$La and summarize the application of the neutrino -process chronometers, $$^{136,138}$$Ce, $$^{138}$$La, and$$^{92}$$Nb. We also consider other aspects.

Journal Articles

Proton-proton phase shifts calculations in momentum space by a rigorous Coulomb treatment

Oryu, Shinsho*; Hiratsuka, Yasuhiro*; Nishinohara, Satoshi*; Chiba, Satoshi

Journal of Physics G; Nuclear and Particle Physics, 39(4), p.045101_1 - 045101_12, 2012/04

 Times Cited Count:4 Percentile:30.68(Physics, Nuclear)

We present a two-body calculation method for a rigorous treatment of Coulomb interaction in momentum ($$p$$-)space. The method is based on a modified Coulomb potential which is equivalent to the genuine Coulomb potential in configuration ($$r$$-)space. We also use the two-potential theory with the auxiliary potential. The calculated proton-proton phase shifts are in very good agreement with the experimental data for the states $$0 le ell le 2$$. The phase shifts for the $$3 le ell le 5$$ states are also calculated. Practical applications of our method in a few hadron problems are discussed.

Journal Articles

Signature inversion in the 7/2$$^-$$[503] band of $$^{185}$$Pt

Li, G. S.*; Zhou, X. H.*; Zhang, Y. H.*; Zheng, Y.*; Liu, M. L.*; Hua, W.*; Zhou, H. B.*; Ding, B.*; Wang, H. X.*; Lei, X. G.*; et al.

Journal of Physics G; Nuclear and Particle Physics, 38(9), p.095105_1 - 095105_9, 2011/09

 Times Cited Count:1 Percentile:12.7(Physics, Nuclear)

High-spin states in $$^{185}$$Pt have been investigated by means of in beam $$gamma$$-ray spectroscopic method at the JAEA tandem facility. Low-spin signature inversion is revealed in the 7/2$$^-$$[503] band. The inversion can be interpreted as a configuration change from the 7/2$$^-$$[503] orbital to the 7/2$$^-$$[514] orbital with increasing spin, which is supported by a theoretical calculation of the semi-classical Donau and Frauendorf approach.

Journal Articles

Properties of a hyperon-quark mixed phase in compact stars

Maruyama, Toshiki; Chiba, Satoshi; Schulze, H.-J.*; Tatsumi, Toshitaka*

Journal of Physics G; Nuclear and Particle Physics, 35(10), p.104076_1 - 104076_4, 2008/10

 Times Cited Count:3 Percentile:29.75(Physics, Nuclear)

We investigate the property of the hadron-quark mixed phase using the Brueckner-Hartree-Fock model for hadron (hyperon) phase and the MIT bag model for quark phase. To satisfy the Gibbs conditions, charge density as well as baryon number density becomes non-uniform in the mixed phase. Taking into account the density distribution and the Coulomb interaction in a self-consistent way, we clarify the roles of the surface tension and the charge screening effect. We will show that the screened Coulomb interaction makes the EOS similar to the one given by the Maxwell construction. We demonstrate that hyperons are suppressed in the mixed phase, because hadron phase is positively charged. This is a novel mechanism of hyperon suppression in compact stars. Finally we will discuss some consequences of our EOS on the structure and the maximum mass of NS.

Journal Articles

Synthesis of $$^{286}$$114 and $$^{290}$$114 using low-energy fusion channels

Gherghescu, R. A.*; Poenaru, D. N.*; Greiner, W.*; Nagame, Yuichiro

Journal of Physics G; Nuclear and Particle Physics, 32(11), p.L73 - L84, 2006/11

 Times Cited Count:8 Percentile:52.15(Physics, Nuclear)

no abstracts in English

Journal Articles

Multi-quasiparticle excitations in $$^{145}$$Tb

Zheng, Y.*; Zhou, X. H.*; Zhang, Y. H.*; Hayakawa, Takehito; Oshima, Masumi; Toh, Yosuke; Shizuma, Toshiyuki; Katakura, Junichi; Hatsukawa, Yuichi; Matsuda, Makoto; et al.

Journal of Physics G; Nuclear and Particle Physics, 30(4), p.465 - 479, 2004/04

 Times Cited Count:8 Percentile:49.41(Physics, Nuclear)

no abstracts in English

Journal Articles

Alpha-decay rates of Yb and Gd in solar-neutrino detectors

Fujiwara, Mamoru; Kawabata, Takahiro*; Mohr, P.*

Journal of Physics G; Nuclear and Particle Physics, 28(4), p.643 - 648, 2002/04

 Times Cited Count:13 Percentile:59.77(Physics, Nuclear)

no abstracts in English

Journal Articles

Multiple Coulomb excitation of a $$^{76}$$Ge beam

Toh, Yosuke; Czosnyka, T.*; Oshima, Masumi; Hayakawa, Takehito; Kusakari, Hideshige*; Sugawara, Masahiko*; Osa, Akihiko; Koizumi, Mitsuo; Hatsukawa, Yuichi; Katakura, Junichi; et al.

Journal of Physics G; Nuclear and Particle Physics, 27(7), p.1475 - 1480, 2001/07

 Times Cited Count:29 Percentile:82.47(Physics, Nuclear)

no abstracts in English

Journal Articles

Equation of state of neutron-star matter and the isovector nucleon optical model potential

Maruyama, Tomoyuki*; Chiba, Satoshi

Journal of Physics G; Nuclear and Particle Physics, 25(12), p.2361 - 2369, 1999/12

 Times Cited Count:3 Percentile:23.9(Physics, Nuclear)

no abstracts in English

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