Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 101

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Gamow-Teller transitions of neutron-rich $$N$$ = 82, 81 nuclei by shell-model calculations

Shimizu, Noritaka*; Togashi, Tomoaki*; Utsuno, Yutaka

Progress of Theoretical and Experimental Physics (Internet), 2021(3), p.033D01_1 - 033D01_15, 2021/03

no abstracts in English

Journal Articles

Thundercloud project; Exploring high-energy phenomena in thundercloud and lightning

Yuasa, Takayuki*; Wada, Yuki*; Enoto, Teruaki*; Furuta, Yoshihiro; Tsuchiya, Harufumi; Hisadomi, Shohei*; Tsuji, Yuna*; Okuda, Kazufumi*; Matsumoto, Takahiro*; Nakazawa, Kazuhiro*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2020(10), p.103H01_1 - 103H01_27, 2020/10

 Times Cited Count:0 Percentile:100(Physics, Multidisciplinary)

Journal Articles

Erratum; The Belle II physics book

Kou, E.*; Tanida, Kiyoshi; Belle II Collaboration*; 537 of others*

Progress of Theoretical and Experimental Physics (Internet), 2020(2), p.029201_1 - 029201_6, 2020/02

 Times Cited Count:47 Percentile:0.32(Physics, Multidisciplinary)

Journal Articles

The Belle II physics book

Kou, E.*; Tanida, Kiyoshi; Belle II Collaboration*; 537 of others*

Progress of Theoretical and Experimental Physics (Internet), 2019(12), p.123C01_1 - 123C01_654, 2019/12

 Times Cited Count:103 Percentile:0.06(Physics, Multidisciplinary)

Journal Articles

Conceptual study on parasitic low-energy RI beam production with in-flight separator BigRIPS and the first stopping examination for high-energy RI beams in the parasitic gas cell

Sonoda, Tetsu*; Katayama, Ichiro*; Wada, Michiharu*; Iimura, Hideki; Sonnenschein, V.*; Iimura, Shun*; Takamine, Aiko*; Rosenbusch, M.*; Kojima, Takao*; Ahn, D. S.*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(11), p.113D02_1 - 113D02_12, 2019/11

 Times Cited Count:0 Percentile:100(Physics, Multidisciplinary)

An in-flight separator, BigRIPS, at RIBF in RIKEN provides each experiment with specific nuclides separated from many nuclides produced by projectile fragmentation or in-flight fission. In this process, nuclides other than separated ones are discarded on the slits in BigRIPS, although they include many nuclides interested from the view point of nuclear structure. In order to extract these nuclides for parasitic experiments, we are developing a method using laser ion-source (PALIS). A test experiment with $$^{78}$$Se beam from RIBF has been performed by using a gas cell set in BigRIPS. Unstable nuclides around $$^{67}$$Se were stopped in the gas cell in accordance with a calculation using LISE code. The stopping efficiency has been estimated to be about 30%. As a next step, we will establish the technique for extracting reaction products from the gas cell.

Journal Articles

Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment

Ekawa, Hiroyuki; Ashikaga, Sakiko; Hasegawa, Shoichi; Hashimoto, Tadashi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji*; Nanamura, Takuya; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D02_1 - 021D02_11, 2019/02

 Times Cited Count:8 Percentile:28.48(Physics, Multidisciplinary)

Journal Articles

Trapping probability of strangeness via $$mathrm{Xi}^{-}$$ hyperon capture at rest in nuclear emulsion

Theint, A. M. M.*; Ekawa, Hiroyuki; Yoshida, Junya; 7 of others*

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D01_1 - 021D01_10, 2019/02

 Times Cited Count:3 Percentile:43.44(Physics, Multidisciplinary)

Journal Articles

Gamma-ray spectrum from thermal neutron capture on gadolinium-157

Hagiwara, Kaito*; Yano, Takatomi*; Das, P. K.*; Lorenz, S.*; Ou, Iwa*; Sakuda, Makoto*; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki; Harada, Hideo; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.023D01_1 - 023D01_26, 2019/02

 Times Cited Count:6 Percentile:23.62(Physics, Multidisciplinary)

Journal Articles

Evaluation of the frequency dependence of the complex conductivity of a resistive chamber by comparing theoretical and measured $$S$$-matrices

Shobuda, Yoshihiro

Progress of Theoretical and Experimental Physics (Internet), 2018(12), p.123G01_1 - 123G01_52, 2018/12

AA2018-0701.pdf:4.3MB

 Times Cited Count:0 Percentile:100(Physics, Multidisciplinary)

For an accurate calculation of the resistive-wall impedance of a resistive chamber, we must know the conductivity of a resistive material. The conductivity of the material at a given frequency can be evaluated by measuring the $$S$$-matrix of a propagation mode in a waveguide. However, in most cases, only the absolute value of the $$S$$-matrix is used for evaluation under the assumption that the conductivity is pure real, although both the $$S$$-matrix and the conductivity are complex numbers in general. To evaluate complex conductivity from a measured complex $$S$$-matrix, we derive new theoretical formulae of the $$S$$-matrix for the TE$$_{11}$$ and TM$$_{01}$$ modes of a waveguide and for the quasi-TEM$$_{00}$$ mode of a coaxial waveguide, where complex conductivity is assumed. In a reverse way, we can determine the conductivity of a material by using it as a fitting parameter in a comparison of a measured $$S$$-matrix with those obtained using theoretical formulae. The three independent methods facilitate triple-checking of the accuracy of the measured conductivity.

Journal Articles

Measurement of the $$tau$$ Michel parameters $$bar{eta}$$ and $$xikappa$$ in the radiative leptonic decay $$tau^- rightarrow ell^- nu_{tau} bar{nu}_{ell}gamma$$

Shimizu, Nobuhiro*; Tanida, Kiyoshi; Belle Collaboration*; 169 of others*

Progress of Theoretical and Experimental Physics (Internet), 2018(2), p.023C01_1 - 023C01_26, 2018/02

 Times Cited Count:2 Percentile:66.12(Physics, Multidisciplinary)

Journal Articles

Resistive-wall impedances of a thin non-evaporable getter coating on a conductive chamber

Shobuda, Yoshihiro; Chin, Y. H.*

Progress of Theoretical and Experimental Physics (Internet), 2017(12), p.123G01_1 - 123G01_22, 2017/12

 Times Cited Count:2 Percentile:70.13(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Observation of simultaneous oscillations of bunch shape and position caused by odd-harmonic beam loading in the Japan Proton Accelerator Research Complex Rapid Cycling Synchrotron

Yamamoto, Masanobu; Nomura, Masahiro; Shimada, Taihei; Tamura, Fumihiko; Hara, Keigo*; Hasegawa, Katsushi*; Omori, Chihiro*; Sugiyama, Yasuyuki*; Yoshii, Masahito*

Progress of Theoretical and Experimental Physics (Internet), 2017(11), p.113G01_1 - 113G01_24, 2017/11

 Times Cited Count:1 Percentile:82.78(Physics, Multidisciplinary)

Two proton bunches circulates the accelerator ring in the J-PARC 3GeV synchrotoron (RCS). The accelerating voltage is also generated in twice of the revolution frequency. The major Fourier component of the wake voltage should become even harmonics. However, the odd harmonics grow and cause a large number of beam loss. The beam measurement suggests that the odd harmonic wake voltages promote oscillations of not only the bunch position but also the bunch shape. The oscillations continue because they amplify the odd harmonic beam components. A particle tracking simulation can reproduce these simultaneous oscillations. It is found that the odd harmonic wake voltages lead to severe rf bucket distortion that results in beam loss. As a result, introducing a beam loading compensation system for the minor harmonics can prevent the beam loss and it would contribute the stable accelerator operation with the reduction of the activation.

Journal Articles

Beam-based compensation of extracted-beam displacement caused by field ringing of pulsed kicker magnets in the 3 GeV rapid cycling synchrotron of the Japan Proton Accelerator Research Complex

Harada, Hiroyuki; Saha, P. K.; Tamura, Fumihiko; Meigo, Shinichiro; Hotchi, Hideaki; Hayashi, Naoki; Kinsho, Michikazu; Hasegawa, Kazuo

Progress of Theoretical and Experimental Physics (Internet), 2017(9), p.093G01_1 - 093G01_16, 2017/09

AA2017-0286.pdf:4.64MB

 Times Cited Count:0 Percentile:100(Physics, Multidisciplinary)

The 3 GeV rapid cycling synchrotron (RCS) of the J-PARC is a high intensity proton accelerator of 1 MW. The accelerated proton beams in the RCS are extracted by eight pulsed kicker magnets and are delivered to a materials and life science experimental facility and main ring synchrotron. However, the fields of the magnets experience ringing that displaces the position of the extracted beam. This is a major issue from the viewpoint of target integrity and large beam loss. The ringing was directly measured as the displacement of the extracted beams by using a shorter pulsed beam and scanning the entire trigger timing of the kickers. We managed to cancel out the ringing by optimizing trigger timing and achieved the beam extraction with high accuracy. We developed automatic correction system of the timing and now have a higher stability. In this paper, we report our procedure and experimental results for ringing compensation.

Journal Articles

Theoretical elucidation of space charge effects on the coupled-bunch instability at the 3 GeV Rapid Cycling Synchrotron at the Japan Proton Accelerator Research Complex

Shobuda, Yoshihiro; Chin, Y. H.*; Saha, P. K.; Hotchi, Hideaki; Harada, Hiroyuki; Irie, Yoshiro*; Tamura, Fumihiko; Tani, Norio; Toyama, Takeshi*; Watanabe, Yasuhiro; et al.

Progress of Theoretical and Experimental Physics (Internet), 2017(1), p.013G01_1 - 013G01_39, 2017/01

AA2016-0375.pdf:3.07MB

 Times Cited Count:9 Percentile:30.41(Physics, Multidisciplinary)

The Rapid Cycling Synchrotron (RCS), whose beam energy ranges from 400 MeV to 3 GeV and which is located in the Japan Proton Accelerator Research Complex, is a kicker-impedance dominant machine, which violates the impedance budget from a classical viewpoint. Contrary to conventional understanding, we have succeeded to accelerate a 1-MW equivalent beam. The machine has some interesting features: for instance, the beam tends to be unstable for the smaller transverse beam size, the beam is stabilized by increasing the peak current ${it etc}$. Space charge effects play an important role in the beam instability at the RCS. In this study, a new theory has been developed to calculate the beam growth rate with the head-tail and coupled-bunch modes ($$m,mu$$) while taking space charge effects into account. The theory sufficiently explains the distinctive features of the beam instabilities at the RCS.

Journal Articles

On the structure observed in the in-flight $$^{3}$$He($$K^{-}, Lambda p)n$$ reaction at J-PARC

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

Progress of Theoretical and Experimental Physics (Internet), 2016(12), p.123D03_1 - 123D03_27, 2016/12

AA2016-0237.pdf:1.53MB

 Times Cited Count:30 Percentile:10.95(Physics, Multidisciplinary)

Journal Articles

Asymmetry dependence of reduction factors from single-nucleon knockout of $$^{30}$$Ne at $$sim$$ 230 MeV/nucleon

Lee, J.*; Liu, H.*; Doornenbal, P.*; Kimura, Masaaki*; Minomo, Kosho*; Ogata, Kazuyuki*; Utsuno, Yutaka; Aoi, Nori*; Li, K.*; Matsushita, Masafumi*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2016(8), p.083D01_1 - 083D01_7, 2016/08

AA2016-0230.pdf:0.16MB

 Times Cited Count:5 Percentile:50.47(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Structure near the $$K^- + p + p$$ threshold in the in-flight $$^3$$He$$(K^-,Lambda p)n$$ reaction

Sada, Yuta*; Tanida, Kiyoshi; J-PARC E15 Collaboration*; 69 of others*

Progress of Theoretical and Experimental Physics (Internet), 2016(5), p.051D01_1 - 051D01_11, 2016/05

AA2016-0392.pdf:1.05MB

 Times Cited Count:39 Percentile:8.21(Physics, Multidisciplinary)

Journal Articles

A Model of charmed baryon-nucleon potential and two- and three-body bound states with charmed baryon

Maeda, Saori*; Oka, Makoto; Yokota, Akira*; Hiyama, Emiko*; Liu, Y.-R.*

Progress of Theoretical and Experimental Physics (Internet), 2016(2), p.023D02_1 - 023D02_29, 2016/02

 Times Cited Count:29 Percentile:11.32(Physics, Multidisciplinary)

A potential model for the interaction between a charmed baryon ($$Lambda_c$$, $$Sigma_c$$, and $$Sigma^*_c$$) and the nucleon ($$N$$) is constructed. The model contains a long-range meson ($$pi$$ and $$sigma$$) exchange part and a short-distance quark exchange part. The quark cluster model is used to evaluate the short-range repulsion and a monopole type form factor is introduced to the long-range potential to reflect the extended structure of hadrons. We determine the cutoff parameters in the form factors by fitting the $$NN$$ scattering data with the same approach and we obtain four sets of parameters (a)-(d). The most attractive potential (d) leads to bound $$Lambda$$c$$N$$ states with $$J^pi = 0^+ $$and $$1^+$$ once the channel couplings among $$Lambda_c, Sigma_c$$ and $$Sigma^*_c$$ are taken into account. One can also investigate many-body problems with the model. Here, we construct an effective $$Lambda_cN$$ one-channel potential with the parameter set (d) and apply it to the 3-body $$Lambda_{cNN}$$ system. The bound states with $$J$$ = 1/2 and 3/2 are predicted.

Journal Articles

Precise determination of $$^{12}_{Lambda}$$C level structure by $$gamma$$-ray spectroscopy

Hosomi, Kenji; Ma, Y.*; Ajimura, Shuhei*; Aoki, Kanae*; Dairaku, Seishi*; Fu, Y.*; Fujioka, Hiroyuki*; Futatsukawa, Kenta*; Imoto, Wataru*; Kakiguchi, Yutaka*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2015(8), p.081D01_1 - 081D01_8, 2015/08

 Times Cited Count:12 Percentile:29.87(Physics, Multidisciplinary)

Level structure of the $$^{12}_{Lambda}$$C hypernucleus was precisely determined by means of $$gamma$$-ray spectroscopy. We identified four $$gamma$$-ray transitions via the $$^{12}$$C$$(pi^{+},K^{+}gamma)$$ reaction using a germanium detector array, Hyperball2. The spacing of the ground-state doublet $$(2^{-}, 1^{-}_{1})$$ was measured to be $$161.5pm0.3$$(stat)$$pm0.3$$ (syst)keV from the direct $$M1$$ transition. Excitation energies of the $$1^{-}_{2}$$ and $$1^{-}_{3}$$ states were measured to be $$2832pm3pm4$$, keV and $$6050pm8pm7$$, keV, respectively. The obtained level energies provide definitive references for the reaction spectroscopy of $$Lambda$$ hypernuclei.

Journal Articles

Search for the deeply bound $$K^- pp$$ state from the semi-inclusive forward-neutron spectrum in the in-flight $$K^-$$ reaction on helium-3

Hashimoto, Tadashi*; Tanida, Kiyoshi; J-PARC E15 Collaboration*; 65 of others*

Progress of Theoretical and Experimental Physics (Internet), 2015(6), p.061D01_1 - 061D01_11, 2015/06

AA2015-0706.pdf:0.81MB

 Times Cited Count:32 Percentile:11.75(Physics, Multidisciplinary)

101 (Records 1-20 displayed on this page)