論文 - 前田 幸重
-
Measurement for p–(formula presented)He Elastic Scattering with a 65 MeV Polarized Proton Beam 査読あり
Nakai S., Sekiguchi K., Miki K., Watanabe A., Mukai T., Shibuya S., Watanabe M., Kawahara K., Sakai D., Wada Y., Shiokawa Y., Taguchi T., Eto D., Akieda T., Kon H., Ito M., Ino T., Hatanaka K., Tamii A., Ong H.J., Kobayashi N., Inoue A., Nakamura S., Wakasa T., Mitsumoto S., Ohshiro H., Goto S., Maeda Y., Sakai H., Uesaka T., Wakui T.
Springer Proceedings in Physics 238 513 - 516 2020年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Springer Proceedings in Physics
We performed the measurement of the cross section and the proton analyzing power (formula presented) for p–(formula presented)He elastic scattering with a 65 MeV polarized proton beam at Research Center for Nuclear Physics (RCNP), Osaka University. The proton analyzing power (formula presented) data are compared with the theoretical calculations based on the nucleon–nucleon potential (INOY04).
-
Sekiguchi K., Wada Y., Watanabe A., Eto D., Akieda T., Kon H., Miki K., Sakamoto N., Sakai H., Sasano M., Shimizu Y., Suzuki H., Uesaka T., Yanagisawa Y., Dozono M., Kawase S., Kubota Y., Yako K., Maeda Y., Kawakami S., Yamamoto T., Sakaguchi S., Wakasa T., Yasuda J., Ohkura A., Shindo Y., Tabata M., Milman E., Chebotaryov S., Okamura H., Tang T.L.
Springer Proceedings in Physics 238 507 - 511 2020年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Springer Proceedings in Physics
In order to study three-nucleon force (3NF) effects in three-nucleon scattering we performed the measurements of the cross sections and the spin observables for the deuteron–proton (dp) scattering with the polarized deuteron beams at the incident energies up to 135 MeV/nucleon. Recently we have extended the measurements at the RIKEN RI Beam Factory (RIBF) with the polarized deuteron beams at 190, 250, and 300 MeV/nucleon.
-
Enhancement of element production by incomplete fusion reaction with weakly bound deuteron 査読あり
Wang H., Otsu H., Chiga N., Kawase S., Takeuchi S., Sumikama T., Koyama S., Sakurai H., Watanabe Y., Nakayama S., Ahn D.S., Baba H., Chen S.D., Chikaato K., Cortés M.L., Fukuda N., Hirayama A., Hosoda R., Isobe T., Kawakami S., Kondo Y., Kubono S., Maeda Y., Masuoka S., Michimasa S., Murray I., Nakajima R., Nakamura T., Nakano K., Nishimura M., Ozaki T., Saito A., Saito T., Sato H., Shimizu Y., Shimoura S., Söderström P.A., Soudo Y., Sun X.H., Suwa J., Suzuki D., Suzuki H., Takeda H., Takechi M., Togano Y., Tomai T., Yamada H., Yasuda M., Yoshida K.
Communications Physics 2 ( 1 ) 2019年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Communications Physics
Searching for effective pathways for the production of proton-rich and neutron-rich isotopes is one of the main driving forces behind experimental and theoretical nuclear reaction studies as well as for practical applications in nuclear transmutation of radioactive waste. To produce nuclei effectively, an optimal combination of reaction mechanism and energy is required. We report a study on incomplete fusion induced by deuteron, which contains one proton and one neutron with a weak binding energy and is easily broken up. This reaction study was achieved by measuring directly the cross sections for both proton and deuteron for Pd at 50 MeV/u via inverse kinematics technique. The results provide direct experimental evidence for the onset of a cross-section enhancement at high energy, indicating the potential for incomplete fusion induced by loosely-bound nuclei for creating proton-rich isotopes and nuclear transmutation of radioactive waste. 107
-
Structure of <sup>13</sup>Be probed via quasi-free scattering 査読あり
Corsi A., Kubota Y., Casal J., Gómez-Ramos M., Moro A.M., Authelet G., Baba H., Caesar C., Calvet D., Delbart A., Dozono M., Feng J., Flavigny F., Gheller J.M., Gibelin J., Giganon A., Gillibert A., Hasegawa K., Isobe T., Kanaya Y., Kawakami S., Kim D., Kiyokawa Y., Kobayashi M., Kobayashi N., Kobayashi T., Kondo Y., Korkulu Z., Koyama S., Lapoux V., Maeda Y., Marqués F.M., Motobayashi T., Miyazaki T., Nakamura T., Nakatsuka N., Nishio Y., Obertelli A., Ohkura A., Orr N.A., Ota S., Otsu H., Ozaki T., Panin V., Paschalis S., Pollacco E.C., Reichert S., Rousse J.Y., Saito A.T., Sakaguchi S., Sako M., Santamaria C., Sasano M., Sato H., Shikata M., Shimizu Y., Shindo Y., Stuhl L., Sumikama T., Sun Y.L., Tabata M., Togano Y., Tsubota J., Uesaka T., Yang Z.H., Yasuda J., Yoneda K., Zenihiro J.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 797 2019年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present an investigation of the structure of Be obtained via a kinematically complete measurement of the (p,pn) reaction in inverse kinematics at 265 MeV/nucleon. The relative energy spectrum of Be is compared to Transfer-to-the-Continuum calculations which use as structure inputs the overlaps of the Be ground-state wave function, computed in a three-body model, with the unbound states of the Be residual nucleus. The key role of neutron p-wave orbital in the interpretation of the low-relative-energy part of the spectrum is discussed. 13 13 14 13
-
Isotope production in proton-, deuteron-, and carbon-induced reactions on Nb 93 at 113 MeV/nucleon 査読あり
Nakano K., Watanabe Y., Kawase S., Wang H., Otsu H., Sakurai H., Takeuchi S., Togano Y., Nakamura T., Maeda Y., Ahn D., Aikawa M., Araki S., Chen S., Chiga N., Doornenbal P., Fukuda N., Ichihara T., Isobe T., Kawakami S., Kin T., Kondo Y., Koyama S., Kubo T., Kubono S., Uesaka M., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Niikura M., Ozaki T., Saito A., Saito T., Shiga Y., Shikata M., Shimizu Y., Shimoura S., Sumikama T., Söderström P., Suzuki H., Takeda H., Taniuchi R., Tsubota J., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
Physical Review C 100 ( 4 ) 2019年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physical Review C
© 2019 American Physical Society. Isotope-production cross sections for p-, d-, and C-induced spallation reactions on Nb93 at 113 MeV/nucleon were measured using the inverse-kinematics method employing secondary targets of CH2, CD2, and C. The measured cross sections for Mo90, Nb90, Y86,88 produced by p-induced reactions were found to be consistent with those measured by the conventional activation method. We performed benchmark tests of the reaction models INCL-4.6, JQMD, and JQMD-2.0 implemented in the Particle and Heavy Ion Transport code System (PHITS) and of the nuclear data libraries JENDL-4.0/HE, TENDL-2017, and ENDF/B-VIII.0. The model calculations also showed generally good agreement with the measured isotope-production cross sections for p-, d-, and C-induced reactions. It also turns out that, among the three nuclear data libraries, JENDL-4.0/HE provides the best agreement with the measured data for the p-induced reactions. We compared the present Nb93 data with the Zr93 data, that were measured previously by the same inverse kinematics method (Kawase et al., Prog. Theor. Exp. Phys. 2017, 093D03 (2017)2050-391110.1093/ptep/ptx110), with particular attention to the effect of neutron-shell closure on isotope production in p- and d-induced spallation reactions. The isotopic distributions of the measured production cross sections in the Zr93 data showed noticeable jumps at neutron number N=50 in the isotopic chains of ΔZ=0 and -1, whereas no such jump appeared in isotopic chain of ΔZ=0 in the Nb93 data. From INCL-4.6 + GEM calculations, we found that the jump formed in the evaporation process is smeared out by the intranuclear cascade component in Nb91 produced by the Nb93(p,p2n) and (d,d2n) reactions on Nb93. Moreover, for Nb93, the distribution of the element-production cross sections as a function of the change in proton number ΔZ is shifted to smaller ΔZ than for Zr93, because the excited Nb prefragments generated by the cascade process are more likely to emit protons than the excited Zr prefragments, due to the smaller proton-separation energies of the Nb isotopes.
-
Coulomb breakup reactions of <sup>93,94</sup> Zr in inverse kinematics 査読あり
Takeuchi S., Nakamura T., Shikata M., Togano Y., Kondo Y., Tsubota J., Ozaki T., Saito A., Otsu H., Wang H., Sakurai H., Watanabe Y., Kawase S., Ahn D., Aikawa M., Ando T., Araki S., Chen S., Chiga N., Doornenbal P., Ebata S., Fukuda N., Isobe T., Kawakami S., Kin T., Koyama S., Kubono S., Maeda Y., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Nakano K., Niikura M., Ogata K., Saito T., Shiga Y., Shimizu Y., Shimoura S., Sumikama T., Söderstrom P., Suzuki H., Takeda H., Taniuchi R., Uesaka M., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
Progress of Theoretical and Experimental Physics 2019 ( 1 ) 2019年1月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Progress of Theoretical and Experimental Physics
© The Author(s) 2019. Published by Oxford University Press on behalf of the Physical Society of Japan. Coulomb breakup reactions of 93,94 Zr have been studied in inverse kinematics at incident beam energies of about 200 MeV/nucleon in order to evaluate neutron capture reaction methods. The 93 Zr(n,γ) 94 Zr reaction is particularly important as a candidate nuclear transmutation reaction for the long-lived fission product 93 Zr in nuclear power plants. One- and two-neutron removal cross sections on Pb and C targets were measured to deduce the inclusive Coulomb breakup cross sections, 375 ± 29 (stat.) ± 30 (syst.) and 403 ± 26 (stat.) ± 31 (syst.) mb for 93 Zr and 94 Zr, respectively. The results are compared with estimates using the standard Lorentzian model and microscopic calculations. The results reveal a possible contribution of the pygmy dipole resonance or giant quadrupole resonance in the Coulomb breakup reactions of 94 Zr.
DOI： 10.1093/ptep/pty138
-
低エネルギー電子散乱による陽子電荷半径測定 招待あり 査読あり
須田利美，青柳泰平，本多佑記，前田幸重， 三浦禎雄，武藤俊哉，南波和希，南部健一， 髙橋健，玉江忠明，塚田暁
加速器 15 ( 2 ) 52 2018年7月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
-
Inoue A., Tamii A., Abe K., Adachi S., Aoi N., Asai M., Fukuda M., Gey G., Hashimoto T., Ideguchi E., Isaak J., Kobayashi N., Maeda Y., Makii H., Matsuta K., Mihara M., Miura M., Shima T., Shimizu H., Tang R., Dinh Trong T., Yamaguchi H., Yang L.
EPJ Web of Conferences 184 2018年6月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：EPJ Web of Conferences
© The Authors, published by EDP Sciences, 2018. Our research goal is to measure the7Be(d, p) reaction to shed light on the7Li problem in the Big-Bang Nucleosynthesis. We are developing an unstable 7Be target for a high-resolution measurement of the7Be(d, p)8Be reaction. We plan to compare two methods to producethe7Be target: (1) Activation method, and (2) Implantation method. We performed an activation methodexperiment at the Van de Graaff at Osaka University, and obtained the cross-section data. A second experiment to obtain more accurate data will take place at the Tandem Electrostatic Accelerator, Kobe University. We have also made a7Be target with implantation method at CRIB, Center for Nuclear Study, Univer-sity of Tokyo. An experiment to measure the (d, p) reaction with the implanted target is scheduled for 2018 at Japan Atomic Energy Agency, tandem facility.
-
Chebotaryov S., Sakaguchi S., Uesaka T., Akieda T., Ando Y., Assie M., Beaumel D., Chiga N., Dozono M., Galindo-Uribarri A., Heffron B., Hirayama A., Isobe T., Kaki K., Kawase S., Kim W., Kobayashi T., Kon H., Kondo Y., Kubota Y., Leblond S., Lee H., Lokotko T., Maeda Y., Matsuda Y., Miki K., Milman E., Motobayashi T., Mukai T., Nakai S., Nakamura T., Ni A., Noro T., Ota S., Otsu H., Ozaki T., Panin V., Park S., Saito A., Sakai H., Sasano M., Sato H., Sekiguchi K., Shimizu Y., Stefan I., Stuhl L., Takaki M., Taniue K., Tateishi K., Terashima S., Togano Y., Tomai T., Wada Y., Wakasa T., Wakui T., Watanabe A., Yamada H., Yang Z., Yasuda M., Yasuda J., Yoneda K., Zenihiro J.
Progress of Theoretical and Experimental Physics 2018 ( 5 ) 2018年5月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Progress of Theoretical and Experimental Physics
© The Author(s) 2018. Differential cross sections of p-6He elastic scattering were measured in inverse kinematics at an incident energy of 200 A MeV, covering the high momentum transfer region of 1.7-2.7 -1. The sensitivity of the elastic scattering at low and high momentum transfers to the density distribution was investigated quantitatively using relativistic impulse approximation calculations. In the high momentum transfer region, where the present data were taken, the differential cross section has an order of magnitude higher sensitivity to the inner part of the 6He density relative to the peripheral part (15:1). This feature makes the obtained data valuable for the deduction of the inner part of the 6He density. The data were compared to a set of calculations assuming different proton and neutron density profiles of 6He. The data are well reproduced by the calculation assuming almost the same profiles of proton and neutron densities around the center of 6He, and a proton profile reproducing the known point-proton radius of 1.94 fm. This finding is consistent with the assumption that the 6He nucleus consists of a rigid α-like core with a two-neutron halo.
DOI： 10.1093/ptep/pty048
-
Noji S., Sakai H., Aoi N., Baba H., Berg G., Doornenbal P., Dozono M., Fukuda N., Inabe N., Kameda D., Kawabata T., Kawase S., Kikuchi Y., Kisamori K., Kubo T., Maeda Y., Matsubara H., Michimasa S., Miki K., Miya H., Miyasako H., Sakaguchi S., Sasamoto Y., Shimoura S., Takaki M., Takeda H., Takeuchi S., Tokieda H., Ohnishi T., Ota S., Uesaka T., Wang H., Yako K., Yanagisawa Y., Yokota N., Yoshida K., Zegers R.
Physical Review Letters 120 ( 17 ) 2018年4月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physical Review Letters
© 2018 American Physical Society. The (N12, C12) charge-exchange reaction at 175 MeV/u was developed as a novel probe for studying the isovector spin giant monopole resonance (IVSMR), whose properties are important for better understanding the bulk properties of nuclei and asymmetric nuclear matter. This probe, now available through the production of N12 as a secondary rare-isotope beam, is exothermic, is strongly absorbed at the surface of the target nucleus, and provides selectivity for spin-transfer excitations. All three properties enhance the excitation of the IVSMR compared to other, primarily light-ion, probes, which have been used to study the IVSMR thus far. The Zr90(N12,C12) reaction was measured and the excitation energy spectra up to about 70 MeV for both the spin-transfer and non-spin-transfer channels were deduced separately by tagging the decay by γ emission from the C12 ejectile. Besides the well-known Gamow-Teller and isobaric analog transitions, a clear signature of the IVSMR was identified. By comparing with the results from light-ion reactions on the same target nucleus and theoretical predictions, the suitability of this new probe for studying the IVSMR was confirmed.
-
Exclusive quasi-free proton knockout from oxygen isotopes at intermediate energies 査読あり
Kawase S., Uesaka T., Tang T.L., Beaumel D., Dozono M., Fukunaga T., Fujii T., Fukuda N., Galindo-Uribarri A., Hwang S., Inabe N., Kawabata T., Kawahara T., Kim W., Kisamori K., Kobayashi M., Kubo T., Kubota Y., Kusaka K., Lee C., Maeda Y., Matsubara H., Michimasa S., Miya H., Noro T., Nozawa Y., Obertelli A., Ogata K., Ota S., Padilla-Rodal E., Sakaguchi S., Sakai H., Sasano M., Shimoura S., Stepanyan S., Suzuki H., Suzuki T., Takaki M., Takeda H., Tamii A., Tokieda H., Wakasa T., Wakui T., Yako K., Yasuda J., Yanagisawa Y., Yokoyama R., Yoshida K., Yoshida K., Zenihiro J.
Progress of Theoretical and Experimental Physics 2018 ( 2 ) 2018年2月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Progress of Theoretical and Experimental Physics
© The Author(s) 2018. The dependence of the single-particle strength on the difference between proton and neutron separation energies is studied for oxygen isotopes in a wide range of isospins. The cross sections of the quasi-free (p, 2p) reaction on 14,16,18,22,24O were measured at intermediate energies. The measured cross sections are compared to predictions based on the distorted wave impulse approximation and shell-model psd valence-space spectroscopic factors. The reduction factors, which are the ratio of the experimental cross sections to the theoretical predictions, show no apparent dependence on the proton–neutron separation energy difference. The result is compatible with the result of the (e, ep) reaction on stable targets and with the predictions of recent ab initio calculations.
DOI： 10.1093/ptep/pty011
-
Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei 査読あり
Adachi S., Kawabata T., Minomo K., Kadoya T., Yokota N., Akimune H., Baba T., Fujimura H., Fujiwara M., Funaki Y., Furuno T., Hashimoto T., Hatanaka K., Inaba K., Ishii Y., Itoh M., Iwamoto C., Kawase K., Maeda Y., Matsubara H., Matsuda Y., Matsuno H., Morimoto T., Morita H., Murata M., Nanamura T., Ou I., Sakaguchi S., Sasamoto Y., Sawada R., Shimizu Y., Suda K., Tamii A., Tameshige Y., Tsumura M., Uchida M., Uesaka T., Yoshida H., Yoshida S.
Physical Review C 97 ( 1 ) 2018年1月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physical Review C
© 2018 American Physical Society. We systematically measured the differential cross sections of inelastic α scattering off self-conjugate A=4n nuclei at two incident energies Eα=130MeV and 386MeV at Research Center for Nuclear Physics, Osaka University. The measured cross sections were analyzed by the distorted-wave Born-approximation (DWBA) calculation using the single-folding potentials, which are obtained by folding macroscopic transition densities with the phenomenological αN interaction. The DWBA calculation with the density-dependent αN interaction systematically overestimates the cross sections for the ΔL=0 transitions. However, the DWBA calculation using the density-independent αN interaction reasonably well describes all the transitions with ΔL=0-4. We examined uncertainties in the present DWBA calculation stemming from the macroscopic transition densities, distorting potentials, phenomenological αN interaction, and coupled channel effects in C12. It was found that the DWBA calculation is not sensitive to details of the transition densities nor the distorting potentials, and the phenomenological density-independent αN interaction gives reasonable results. The coupled-channel effects are negligibly small for the 21+ and 31- states in C12, but not for the 02+ state. However, the DWBA calculation using the density-independent interaction at Eα=386MeV is still reasonable even for the 02+ state. We concluded that the macroscopic DWBA calculations using the density-independent interaction are reliably applicable to the analysis of inelastic α scattering at Eα∼100MeV/u.
-
Okazaki K., Hayashida K., Nakajima H., Shomura R., Yoneyama T., Matsumoto H., Tsunemi H., Mori K., Tsujimoto M., Maeda Y., Ebisawa K.
Proceedings of SPIE - The International Society for Optical Engineering 10709 2018年1月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of SPIE - The International Society for Optical Engineering
© 2018 SPIE. X-ray Imaging Spectrometers (XIS) are the X-ray CCD cameras onboard Suzaku. They were operated in orbit from 2005 to 2015 and produced lots of findings with their good energy resolution and low non X-rat background. Precise calibration including the 10 eV accuracy in the energy scale reinforced them. Nevertheless, there has been a unresolved calibration issue in the spectral response around the Si-K edge (1.839 keV) appearing as systematic residuals up to 10%. The residual is negative peaking at 1.85 keV in the front illuminated (FI) sensors and positive peaking at 1.8 keV in the back illuminated (BI) sensor for X-ray sources dominated by continuum X-ray emission. Various attempts to eliminate these residuals by changing response parameters or quantum efficiency models have been insufficient. In this paper, we revisit this problem by focusing on the relation between incident X-ray energy and pulse height. We introduce a jump in that relation at the Si-K edge by modifying the, and optimize its value so as to minimize the residuals in the fit of the X-ray spectra for the black hole binary LMC X-3, a source dominated by continuum emission. We find the introduction of a jump significantly reduces the residuals. The optimized jump values are +4.2 channel, +4.0 channel, and -3.1 channel, corresponding to 15.3 eV, -11.3 eV, and 14.6 eV, for XIS0, XIS3 (FI), and XIS1 (BI), respectively. The direction of the jump is opposite for the FI and for the BI. We revise the response matrices generator so as to include the jump for each XIS sensor, and apply it to the X-ray spectra of the Perseus cluster of galaxies which has various emission lines in the spectra, and the blazar PKS2155-304 which was observed various epoch in the Suzakuoperation. We confirm the residuals are significantly reduced for these sources, too. We finally suggest the jump at Si-K edge in the energy and pulse height relation is qualitatively explained, if some of charges are lost in course of charger collection to the electrode of the CCD in the depletion later, and its amount is large for larger travel length in the depletion layer. If this explanation is correct, the Si-K edge problem and its solution presented in this paper is not specific only for the SuzakuXIS but also for other X-ray CCDs.
DOI： 10.1117/12.2314259
-
Sun X., Wang H., Otsu H., Sakurai H., Ahn D.S., Aikawa M., Doornenbal P., Fukuda N., Isobe T., Kawakami S., Koyama S., Kubo T., Kubono S., Lorusso G., Maeda Y., Makinaga A., Momiyama S., Nakano K., Niikura M., Shiga Y., Söderström P.A., Suzuki H., Takeda H., Takeuchi S., Taniuchi R., Watanabe Y., Watanabe Y., Yamasaki H., Yoshida K.
Proceedings of the 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018 153 - 157 2018年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of the 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018
© The Authors, 2019. Published by CERN. The isotopic distribution of the production cross sections of 136Xe on proton and carbon at 168 MeV/u were obtained in inverse kinematics technique at RIKEN Radioactive Isotope Beam Factory. The target dependence at 168 MeV/u was investigated systematically. The cross sections measured in the present work are compared with the previous results obtained at different reaction energies to investigate the energy dependence for the reactions on proton. The experimental results on proton are compared with the PHITS calculations including both the cascade and evaporation processes for the model benchmarking.
-
Watanabe Y., Suwa J., Nakano K., Kawase S., Wang H., Otsu H., Sakurai H., Ahn D.S., Aikawa M., Ando T., Araki S., Chen S., Chiga N., Doornenbal P., Fukuda N., Isobe T., Kawakami S., Kin T., Kondo Y., Koyama S., Kubono S., Maeda Y., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Nakamura T., Niikura M., Ozaki T., Saito A., Saito T., Shiga Y., Shikata M., Shimizu Y., Shimoura S., Sumikama T., Soderstrom P.A., Suzuki H., Takeda H., Takeuchi S., Taniuchi R., Togano Y., Tsubota J., Uesaka M., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
Proceedings of the 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018 139 - 143 2018年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Proceedings of the 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018
© The Authors, 2019. Published by CERN. Production cross sections of residual nuclei via proton- and deuteron-induced spallation reactions on 91,92Y, 92,93Zr, and 93,94Nb at projectile energies around 100 MeV/nucleon were measured in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Noticeable jumps in the measured cross sections of isotone production appear between the neutron numbers N=51 and 50 for target nuclei with the initial neutron number Ninit=53 (92Y, 93Zr, and 94Nb), while such jump is not clearly seen for target nuclei with Ninit=52 (91Y, 92Zr, and 93Nb). The measured isotopic production cross sections are compared with PHITS calculations considering both the intranuclear cascade and evaporation processes in order to benchmark the reaction models.
-
Complete set of deuteron analyzing powers from d - p elastic scattering at 190 MeV/nucleon 査読あり
Sekiguchi K., Witała H., Akieda T., Eto D., Kon H., Wada Y., Watanabe A., Chebotaryov S., Dozono M., Golak J., Kamada H., Kawakami S., Kubota Y., Maeda Y., Miki K., Milman E., Ohkura A., Sakai H., Sakaguchi S., Sakamoto N., Sasano M., Shindo Y., Skibiński R., Suzuki H., Tabata M., Uesaka T., Wakasa T., Yako K., Yamamoto T., Yanagisawa Y., Yasuda J.
Physical Review C 96 ( 6 ) 2017年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physical Review C
© 2017 American Physical Society. All deuteron analyzing powers for elastic deuteron-proton (dp) scattering have been measured with a polarized deuteron beam at 186.6 MeV/nucleon. They are compared with results of three-nucleon Faddeev calculations based on the standard, high-precision nucleon-nucleon (NN) potentials alone or combined with commonly used three-nucleon force (3NF) models such as the Tucson-Melbourne '99 or the Urbana IX. Predicted 3NF effects localized at backward angles are supported only partially by the data. The data are also compared to predictions based on locally regularized chiral NN potentials. An estimation of theoretical truncation uncertainties in the consecutive orders of chiral expansion suggests that the observed discrepancies between this modern theory and the data could probably be explained by including chiral 3NF's in future calculations. A systematic comparison to the deuteron analyzing power data previously taken at incident energies from 70 to 294 MeV/nucleon clearly shows that not only the cross section but also the analyzing powers reveal growing 3NF effects when the three-nucleon system energy is increased.
-
Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance 査読あり
Martin D., Von Neumann-Cosel P., Tamii A., Aoi N., Bassauer S., Bertulani C., Carter J., Donaldson L., Fujita H., Fujita Y., Hashimoto T., Hatanaka K., Ito T., Krugmann A., Liu B., Maeda Y., Miki K., Neveling R., Pietralla N., Poltoratska I., Ponomarev V., Richter A., Shima T., Yamamoto T., Zweidinger M.
Physical Review Letters 119 ( 18 ) 2017年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Physical Review Letters
© 2017 American Physical Society. The gamma strength function and level density of 1- states in Mo96 have been extracted from a high-resolution study of the (p→, p→′) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for Mo96 and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.
-
Kawase S., Watanabe Y., Wang H., Otsu H., Sakurai H., Takeuchi S., Togano Y., Nakamura T., Maeda Y., Ahn D., Aikawa M., Araki S., Chen S., Chiga N., Doornenbal P., FGBRuda N., Ichihara T., Isobe T., Kawakami S., Kin T., Kondo Y., Koyama S., Kubo T., Kubono S., Kurokawa M., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Nakano K., Niikura M., Ozaki T., Saito A., Saito T., Shiga Y., Shikata M., Shimizu Y., Shimoura S., Sumikama T., Söderström P., SuzGBRi H., Takeda H., Taniuchi R., Tsubota J., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
EPJ Web of Conferences 146 2017年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：EPJ Web of Conferences
© The Authors, published by EDP Sciences, 2017. Isotopic production cross sections in the proton-and deuteron-induced spallation reactions on 93Zr at an energy of 105 MeV/u were measured in inverse kinematics conditions for the development of realistic nuclear transmutation processes for long-lived fission products (LLFPs) with neutron and light-ion beams. The experimental results were compared to the PHITS calculations describing the intra-nuclear cascade and evaporation processes. Although an overall agreement was obtained, a large overestimation of the production cross sections for the removal of a few nucleons was seen. A clear shell effect associated with the neutron magic number N = 50 was observed in the measured isotopic production yields of Zr and Y isotopes, which can be reproduced reasonably by the PHITS calculation.
-
Nakano K., Watanabe Y., Kawase S., Wang H., Otsu H., Sakurai H., Takeuchi S., Togano Y., Nakamura T., Maeda Y., Ahn D., Aikawa M., Araki S., Chen S., Chiga N., Doornenbal P., Fukuda N., Ichihara T., Isobe T., Kawakami S., Kin T., Kondo Y., Koyama S., Kubo T., Kubono S., Kurokawa M., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Niikura M., Ozaki T., Saito A., Saito T., Shiga Y., Shikata M., Shimizu Y., Shimoura S., Sumikama T., Söderström P., Suzuki H., Takeda H., Taniuchi R., Tsubota J., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
EPJ Web of Conferences 146 2017年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：EPJ Web of Conferences
© The Authors, published by EDP Sciences, 2017. Isotopic production cross sections were measured for proton- and deuteron-induced reactions on93Nb by means of the inverse kinematics method at RIKEN Radioactive Isotope Beam Factory. The measured production cross sections of residual nuclei in the reaction93Nb + p at 113 MeV/u were compared with previous data measured by the conventional activation method in the proton energy range between 46 and 249 MeV. The present inverse kinematics data of four reaction products (90Mo,90Nb,88Y, and86Y) were in good agreement with the data of activation measurement. Also, the model calculations with PHITS describing the intra-nuclear cascade and evaporation processes generally well reproduced the measured isotopic production cross sections.
-
Wang H., Otsu H., Sakurai H., Ahn D., Aikawa M., Ando T., Araki S., Chen S., Chiga N., Doornenbal P., Fukuda N., Isobe T., Kawakami S., Kawase S., Kin T., Kondo Y., Koyama S., Kubono S., Maeda Y., Makinaga A., Matsushita M., Matsuzaki T., Michimasa S., Momiyama S., Nagamine S., Nakamura T., Nakano K., Niikura M., Ozaki T., Saito A., Saito T., Shiga Y., Shikata M., Shimizu Y., Shimoura S., Sumikama T., Söderström P., Suzuki H., Takeda H., Takeuchi S., Taniuchi R., Togano Y., Tsubota J., Uesaka M., Watanabe Y., Watanabe Y., Wimmer K., Yamamoto T., Yoshida K.
EPJ Web of Conferences 146 2017年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：EPJ Web of Conferences
© The Authors, published by EDP Sciences, 2017. Spallation reactions for the long-lived fission products137Cs,90Sr and107Pd have been studied for the purpose of nuclear waste transmutation. The cross sections on the proton- and deuteron-induced spallation were obtained in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Both the target and energy dependences of cross sections have been investigated systematically. and the cross-section differences between the proton and deuteron are found to be larger for lighter fragments. The experimental data are compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intra-nuclear cascade and evaporation processes.