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15 results on '"DeukSoon Ahn"'

1. Mapping of a New Deformation Region Around Ti62

Author

DeukSoon Ahn, Tatsuya Furuno, Hiroyuki Miya, G. P. A. Berg, Andreas Stolz, Susumu Shimoura, A. Mizukami, Kenichi Yoshida, Eiji Ideguchi, Hideyuki Sakai, Motonobu Takaki, H. Takeda, Y. Yanagisawa, Shin'ichiro Michimasa, Shuichi Ota, H. Nagakura, Naoki Fukuda, Yuya Kubota, Masafumi Matsushita, H. Oikawa, Toshiyuki Kubo, Takeo Kawabata, Hiroshi Suzuki, Tomohiro Uesaka, Satoshi Takeuchi, Shoichiro Kawase, Masanori Dozono, K. Kobayashi, R. Yokoyama, Y. Kiyokawa, Y. L. Yamaguchi, Y. Shimizu, H. Baba, D. Nishimura, Kentaro Yako, C. S. Lee, Hiroshi Tokieda, K. Kisamori, Naohito Inabe, and Motoki Kobayashi

Subjects
Materials science, Isotope, chemistry, Neutron number, Isotopes of vanadium, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Scandium, Deformation (engineering), Beam (structure), Atomic mass, Titanium
Abstract

We performed the first direct mass measurements of neutron-rich scandium, titanium, and vanadium isotopes around the neutron number 40 at the RIKEN RI Beam Factory using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of ^{58-60}Sc, ^{60-62}Ti, and ^{62-64}V were measured for the first time. The experimental results show that the two-neutron separation energies in the vicinity of ^{62}Ti increase compared to neighboring nuclei. This shows that the masses of Ti isotopes near N=40 are affected by the Jahn-Teller effect. Therefore, a development of Jahn-Teller stabilization appears below the Cr isotopes, and the systematics in Sc, Ti, and V isotopes suggest that ^{62}Ti is located close to the peak of the Jahn-Teller effect.

Published
2020

2. g Factor of the Zr99 ( 7/2+ ) Isomer: Monopole Evolution in the Shape-Coexisting Region

Author

Naoki Fukuda, T. Nishizaka, Georgi Georgiev, Ish Mukul, Megumi Niikura, W. Kim, D. L. Balabanski, A. Kusoglu, Yoji Kobayashi, Koichiro Asahi, Hiroki Nishibata, T. Egami, DeukSoon Ahn, S. Kisyov, Yuichi Ohtomo, Yoko Ishibashi, Hiroshi Suzuki, K. Imamura, Gary Simpson, T. Kawaguchi, L. C. Tao, T. Fujita, Satoru Momiyama, Michael Hass, A. Gladkov, C. Funayama, Atsuko Odahara, Takuso Sato, Takashi Kawamura, Naohito Inabe, J. M. Daugas, R. Lozeva, F. Boulay, Hiroaki Ueno, Shuichiro Kojima, D. Ralet, Takeshi Furukawa, Toshiyuki Sumikama, Y. Shimizu, H. Yamazaki, D. Tominaga, Yasuhiro Togano, H. Baba, Yuichi Ichikawa, Xiaofei Yang, A. Takamine, D. Bucurescu, and H. Takeda

Subjects
Physics, Angular distribution, medicine.anatomical_structure, Magnetic moment, 0103 physical sciences, Magnetic monopole, medicine, General Physics and Astronomy, Parity (physics), Atomic physics, 010306 general physics, 01 natural sciences, Nucleus
Abstract

The gyromagnetic factor of the low-lying E=251.96(9) keV isomeric state of the nucleus ^{99}Zr was measured using the time-dependent perturbed angular distribution technique. This level is assigned a spin and parity of J^{π}=7/2^{+}, with a half-life of T_{1/2}=336(5) ns. The isomer was produced and spin aligned via the abrasion-fission of a ^{238}U primary beam at RIKEN RIBF. A magnetic moment |μ|=2.31(14)μ_{N} was deduced showing that this isomer is not single particle in nature. A comparison of the experimental values with interacting boson-fermion model IBFM-1 results shows that this state is strongly mixed with a main νd_{5/2} composition. Furthermore, it was found that monopole single-particle evolution changes significantly with the appearance of collective modes, likely due to type-II shell evolution.

Published
2020

3. Spallation reaction study for the long-lived fission products in nuclear waste: Cross section measurements for 137 Cs, 90 Sr and 107 Pd using inverse kinematics method

Author

Megumi Niikura, P. A. Söderström, DeukSoon Ahn, Shin'ichiro Michimasa, Hiroyuki Takeda, Yoshiaki Shiga, Giusseppe Lorusso, Yasushi Watanabe, Hideaki Otsu, Satoshi Takeuchi, T. Ozaki, Naoki Fukuda, Hiroshi Suzuki, Yukinobu Watanabe, Pieter Doornenbal, Hongwei Wang, Satoru Momiyama, Keita Nakano, Yosuke Kondo, Toshiyuki Sumikama, Teiichiro Matsuzaki, Koichi Yoshida, Hiroyoshi Sakurai, Shoichiro Kawase, Toshiyuki Kubo, Atsumi Saito, Kathrin Wimmer, Tatsuya Yamamoto, Yohei Shimizu, Takashi Nakamura, Nobuyuki Chiga, Yukie Maeda, Meiko Uesaka, Shigeru Kubono, A. Makinaga, Takeshi Saito, Susumu Shimoura, Tadahiro Kin, Tadaaki Isobe, Takashi Ando, Yasuhiro Togano, Masafumi Matsushita, Shunpei Koyama, S. Nagamine, Ryo Taniuchi, Shouhei Araki, Masayuki Aikawa, J. Tsubota, and S. Kawakami

Subjects
Fission products, Materials science, Nuclear transmutation, Proton, 010308 nuclear & particles physics, Radioactive waste, 01 natural sciences, Nuclear physics, Cross section (physics), Deuterium, 0103 physical sciences, Spallation, 010306 general physics, Long-lived fission product
Abstract

Spallation reaction study has been performed for the long-lived fission products 137Cs, 90Sr and 107Pd. Isotopic cross sections on proton and deuteron were obtained by using the inverse kinematics technique at the RIKEN Radioactive Isotope Beam Factory. It was found that the deuteron-induced cross sections are larger than the proton-induced ones for the light-mass products. The experimental data were compared with the SPACS semi-empirical parameterization and a theoretical calculation including both the intra-nuclear cascade and evaporation models by the PHITS transport code. It was found that the spallation reaction could be a promising mechanism for the transmutation of 137Cs and 90Sr due to the large total cross section.

Published
2017

4. Cross-section measurement in the reactions of 136Xe on proton, deuteron and carbon

Author

Yoshiaki Shiga, Keita Nakano, DeukSoon Ahn, Satoru Momiyama, Ya. Watanabe, Hiroyoshi Sakurai, H. W. Wang, A. Makinaga, S. Taniuchi, Koichi Yoshida, Megumi Niikura, Yukie Maeda, Satoshi Takeuchi, Hiroyuki Takeda, Giuseppe Lorusso, Hayata Yamasaki, Hiroshi Suzuki, Naoki Fukuda, S. Kawakami, Masayuki Aikawa, Hideaki Otsu, Yu. Watanabe, Shigeru Kubono, Shoko Koyama, Toshiyuki Kubo, T. Isobe, X. H. Sun, and P. A. Söderström

Subjects
Materials science, Proton, 010308 nuclear & particles physics, Physics, QC1-999, Nuclear Theory, Evaporation, chemistry.chemical_element, 01 natural sciences, Nuclear physics, Cross section (physics), Deuterium, chemistry, Cascade, 0103 physical sciences, Physics::Accelerator Physics, Nuclear Experiment, 010306 general physics, Carbon, Beam (structure)
Abstract

The isotopic production cross sections for the reactions of 136Xe induced by proton, deuteron and carbon at 168 MeV/u were obtained by using the inverse kinematics technique at RIKEN Radioactive Isotope Beam Factory. The target dependence of the cross sections was investigated systematically. It was found that for the light-mass products, the cross sections on carbon are larger than those on deuteron and proton. The measured cross sections on proton were compared with the previous data at higher reaction energies to study the energy dependence. The experimental results were compared with the theoretical calculations including both the intranuclear cascade and evaporation processes using PHITS and with the EPAX and SPACS empirical parameterizations.

Published
2020

5. Spallation reaction study for long-lived fission products in nuclear waste

Author

Hideaki Otsu, J. Tsubota, Takeshi Saito, Yukie Maeda, Megumi Niikura, H. Wang, Atsumi Saito, Pär-Anders Söderström, T. Ozaki, Hiroyuki Takeda, Ryo Taniuchi, Tatsuya Yamamoto, Nobuyuki Chiga, M. Shikata, Yohei Shimizu, Pieter Doornenbal, Meiko Uesaka, Toshiyuki Sumikama, Yoshiaki Shiga, Satoshi Takeuchi, Shigeru Kubono, Hiroshi Suzuki, Koichi Yoshida, S. Kawakami, Yukinobu Watanabe, Keita Nakano, Shouhei Araki, Satoru Momiyama, Yosuke Kondo, Shunpei Koyama, DeukSoon Ahn, Masafumi Matsushita, Shoichiro Kawase, S. Nagamine, Teiichiro Matsuzaki, Kathrin Wimmer, Yasushi Watanabe, Naoki Fukuda, Hiroyoshi Sakurai, A. Makinaga, Takashi Nakamura, Susumu Shimoura, Tadahiro Kin, Tadaaki Isobe, Takashi Ando, Yasuhiro Togano, Shin ichiro Michimasa, Sidong Chen, and Masayuki Aikawa

Subjects
Nuclear fission product, Materials science, Proton, Nuclear transmutation, 010308 nuclear & particles physics, Physics, QC1-999, Nuclear Theory, Radioactive waste, 01 natural sciences, Nuclear physics, Deuterium, 0103 physical sciences, Physics::Accelerator Physics, Spallation, Nuclear Experiment, 010306 general physics, Long-lived fission product, Nucleon
Abstract

Spallation reaction for the long-lived fission product 107Pd has been studied for the purpose of nuclear waste transmutation. The isotopic-distribution cross sections on both proton and deuteron were obtained at 118 MeV/nucleon in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. A large cross-section difference was found between the proton and deuteron results for the light-mass products. The data were compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intranuclear cascade and evaporation processes. In addition, the potential of spallation reaction for transmutation of 107Pd is discussed.

Published
2020

6. Beta decay of the Tz=-2 nucleus 64Se and its descendants

Author

B. Blank, H. Takeda, Toshiyuki Sumikama, E. Ganioglu, G. G. Kiss, A. Algora, P. Aguilera, DeukSoon Ahn, A. I. Morales, Shin-Ichiro Nishimura, A. Montaner-Pizá, F. Molina, Shigeru Kubono, Daiki Nishimura, G. de Angelis, J. Giovinazzo, F. Diel, R. B. Cakirli, J. Chiba, H. Oikawa, Yoshitaka Fujita, W. Gelletly, V. Guadilla, Jorge Agramunt, Berta Rubio, T. Kurtukian, Momoko Tanaka, C. Sidong, Yoshifumi R. Shimizu, Tomio Kubo, P. A. Söderström, P. Vi, N. Fukuda, Y. Takei, A. Boso, C. Borcea, Shintaro Go, Naohito Inabe, C. Magron, S. E. A. Orrigo, S. Grévy, D. Lubos, H. Suzuki, D. R. Napoli, M. Gerbaux, P. Doornenbal, S. Yang, P. Asher, Jinguang Wu, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Paper, History, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], 010308 nuclear & particles physics, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Beta decay, Computer Science Applications, Education, ddc, Nuclear physics, Proton radiation, medicine.anatomical_structure, Fragmentation (mass spectrometry), 0103 physical sciences, Bound state, medicine, 010306 general physics, Nucleus
Abstract

International audience; The beta decay of the Tz=-2 nucleus 64Se has been studied in a fragmentation reaction at RIKEN-Nishina Center. 64Se is the heavies Tz=-2 nucleus that decays to bound states in the daughter nucleus and the heaviest case where the mirror reaction 64Zn(3He,t)64Ga on the Tz=+2 64Zn stable target exists and can be compared. Beta-delayed gamma and proton radiation is reported for the 64Se and 64As cases. New levels have been observed in 64As, 64Ge (N=Z), 63Ge and 63Ga. The associated T1/2 values have been obtained.

Published
2018

7. Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55–57

Author

Y. Shimizu, Susumu Shimoura, Masafumi Matsushita, Eiji Ideguchi, Yuya Kubota, K. Kobayashi, Andreas Stolz, H. Baba, Hiroshi Tokieda, Naoki Fukuda, R. Yokoyama, Y. L. Yamaguchi, Hideyuki Sakai, Takeo Kawabata, Kentaro Yako, Toshiyuki Kubo, Daiki Nishimura, Tomohiro Uesaka, Tatsuya Furuno, Y. Yanagisawa, Shuichi Ota, H. Nagakura, DeukSoon Ahn, Kenichi Yoshida, Motoki Kobayashi, C. S. Lee, K. Kisamori, Hiroyuki Miya, A. Mizukami, Motonobu Takaki, H. Oikawa, Masanori Dozono, H. Takeda, Shin'ichiro Michimasa, Naohito Inabe, Hiroshi Suzuki, Satoshi Takeuchi, Shoichiro Kawase, Y. Kiyokawa, and G. P. A. Berg

Subjects
Physics, 010308 nuclear & particles physics, Band gap, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, General Physics and Astronomy, 01 natural sciences, Atomic mass, Isotopes of calcium, Atomic orbital, Neutron number, 0103 physical sciences, Neutron, MAGIC (telescope), Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

We perform the first direct mass measurements of neutron-rich calcium isotopes beyond neutron number 34 at the RIKEN Radioactive Isotope Beam Factory by using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of ^{55-57}Ca are determined for the first time to be -18650(160), -13510(250), and -7370(990) keV, respectively. We examine the emergence of neutron magicity at N=34 based on the new atomic masses. The new masses provide experimental evidence for the appearance of a sizable energy gap between the neutron 2p_{1/2} and 1f_{5/2} orbitals in ^{54}Ca, comparable to the gap between the neutron 2p_{3/2} and 2p_{1/2} orbitals in ^{52}Ca. For the ^{56}Ca nucleus, an open-shell property in neutrons is suggested.

Published
2018

8. Discovery of Ca60 and Implications For the Stability of Ca70

Author

Hiroyoshi Sakurai, Kensuke Kusaka, DeukSoon Ahn, Kenichi Yoshida, Toshiyuki Sumikama, Mauricio Portillo, D. Bazin, Marc Hausmann, H. Takeda, Hideaki Otsu, Masao Ohtake, B. M. Sherrill, Tetsuro Komatsubara, Toshiyuki Kubo, Y. Yanagisawa, Hiroshi Sato, K. Kawata, Andreas Stolz, Naoki Fukuda, Hiroaki Ueno, Alexandra Gade, Oleg B. Tarasov, Naohito Iwasa, S Ishikawa, Naohito Inabe, T. Sakakibara, Michael Thoennessen, D. J. Morrissey, Y. Shimizu, and Hiroshi Suzuki

Subjects
Physics, Crystallography, Isotope, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Nuclear drip line, 010306 general physics, 01 natural sciences
Abstract

The discovery of the important neutron-rich nucleus _{20}^{60}Ca_{40} and seven others near the limits of nuclear stability is reported from the fragmentation of a 345 MeV/u ^{70}Zn projectile beam on ^{9}Be targets at the radioactive ion-beam factory of the RIKEN Nishina Center. The produced fragments were analyzed and unambiguously identified using the BigRIPS two-stage in-flight separator. The eight new neutron-rich nuclei discovered, ^{47}P, ^{49}S, ^{52}Cl, ^{54}Ar, ^{57}K, ^{59,60}Ca, and ^{62}Sc, are the most neutron-rich isotopes of the respective elements. In addition, one event consistent with ^{59}K was registered. The results are compared with the drip lines predicted by a variety of mass models and it is found that the models in best agreement with the observed limits of existence in the explored region tend to predict the even-mass Ca isotopes to be bound out to at least ^{70}Ca.

Published
2018

9. Discovery of Rb72 : A Nuclear Sandbank Beyond the Proton Drip Line

Author

Y. F. Fang, Jack Henderson, Hiroyoshi Sakurai, F. Browne, Simon M Rice, Jinguang Wu, Zhengyu Xu, V. Werner, H. Takeda, Z. Patel, Z. H. Li, Y. Shimizu, Shigeru Kubono, H. Baba, DeukSoon Ahn, A. Estrade, P-A Soderstrom, Shin-Ichiro Nishimura, P. Doornenbal, D. Lubos, Tomio Kubo, I. Nishizuka, T. Isobe, Peter Schury, Enrico Maglione, P. J. Davies, Lidia S. Ferreira, Hiroshi Suzuki, D. G. Jenkins, Toshiyuki Sumikama, Giuseppe Lorusso, Naoki Fukuda, L. Sinclair, Naohito Inabe, Hirofumi Watanabe, and R. Wadsworth

Subjects
Physics, Proton, 010308 nuclear & particles physics, Proton decay, SHELL model, General Physics and Astronomy, 01 natural sciences, Atomic mass, 0103 physical sciences, Atomic physics, 010306 general physics, Mirror symmetry, Energy (signal processing), Line (formation)
Abstract

In this Letter, the observation of two previously unknown isotopes is presented for the first time: $^{72}\mathrm{Rb}$ with 14 observed events and $^{77}\mathrm{Zr}$ with one observed event. From the nonobservation of the less proton-rich nucleus $^{73}\mathrm{Rb}$, we derive an upper limit for the ground-state half-life of 81 ns, consistent with the previous upper limit of 30 ns. For $^{72}\mathrm{Rb}$, we have measured a half-life of 103(22) ns. This observation of a relatively long-lived odd-odd nucleus, $^{72}\mathrm{Rb}$, with a less exotic odd-even neighbor, $^{73}\mathrm{Rb}$, being unbound shows the diffuseness of the proton drip line and the possibility of sandbanks to exist beyond it. The $^{72}\mathrm{Rb}$ half-life is consistent with a ${5}^{+}\ensuremath{\rightarrow}5/{2}^{\ensuremath{-}}$ proton decay with an energy of 800--900 keV, in agreement with the atomic mass evaluation proton-separation energy as well as results from the finite-range droplet model and shell model calculations using the GXPF1A interaction. However, we cannot explicitly exclude the possibility of a proton transition between ${9}^{+}(^{72}\mathrm{Rb})\ensuremath{\rightarrow}9/{2}^{+}(^{71}\mathrm{Kr})$ isomeric states with a broken mirror symmetry. These results imply that $^{72}\mathrm{Kr}$ is a strong waiting point in x-ray burst $rp$-process scenarios.

Published
2017

10. Spallation reaction study for the long-lived fission product 107Pd

Author

Masayuki Aikawa, Tatsuya Yamamoto, Keita Nakano, Takashi Nakamura, Masafumi Matsushita, Hiroshi Suzuki, Atsumi Saito, Susumu Shimoura, Tadahiro Kin, Shunpei Koyama, H. Otsu, Pär-Anders Söderström, S. Nagamine, S. Kawakami, Takeshi Saito, T. Ozaki, Meiko Uesaka, Satoru Momiyama, Tadaaki Isobe, Yoshiaki Shiga, Yosuke Kondo, Toshiyuki Sumikama, Megumi Niikura, Takashi Ando, Shigeru Kubono, Chiga Nobuyuki, Yasuhiro Togano, Shoichiro Kawase, Koichi Yoshida, Yohei Shimizu, Yukinobu Watanabe, Satoshi Takeuchi, Yukie Maeda, Shin'ichiro Michimasa, Pieter Doornenbal, Hongwei Wang, R. Taniuchi, J. Tsubota, Hiroyuki Takeda, Sidong Chen, Hiroyoshi Sakurai, Kathrin Wimmer, Yasushi Watanabe, A. Makinaga, M. Shikata, Shouhei Araki, Teiichiro Matsuzaki, Naoki Fukuda, and DeukSoon Ahn

Subjects
Physics, Nuclear physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, Spallation, Fission product yield, 010306 general physics, Long-lived fission product, 01 natural sciences
Published
2017

11. Status of Beam Line Detectors for the BigRIPS Fragment Separator at RIKEN RI Beam Factory: Issues on High Rates and Resolution

Author

Daisuke Kameda, Takehiro Shimaoka, Junichi Kaneko, Yuki Sato, Masakatsu Tsubota, Hidekazu Kumagai, Hiroyuki Takeda, Hitoshi Umezawa, H. Murakami, Toshiyuki Kubo, Naohito Inabe, Shinichi Shikata, Daichi Murai, Hiromi Sato, Koichi Yoshida, Naoki Fukuda, Hiroshi Suzuki, Akiyoshi Chayahara, Yohei Shimizu, and DeukSoon Ahn

Subjects
Physics, Nuclear physics, High rate, Beamline, Detector, Separator (electricity)
Published
2015

12. Spallation reaction study for fission products in nuclear waste: Cross section measurements for 137Cs, 90Sr and 107Pd on proton and deuteron.

Author

He Wang, Hideaki Otsu, Hiroyoshi Sakurai, DeukSoon Ahn, Masayuki Aikawa, Takashi Ando, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Doornenbal, Pieter, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Shoichiro Kawase, Tadahiro Kin, Yosuke Kondo, Shupei Koyama, Shigeru Kubono, Yukie Maeda, and Ayano Makinaga

Subjects
RADIOACTIVE wastes, FISSION products, PROTONS, DEUTERONS, SPALLATION (Nuclear physics), KINEMATICS
Abstract

Spallation reactions for the long-lived fission products 137Cs, 90Sr and 107Pd 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. [ABSTRACT FROM AUTHOR]

Published
2017
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13. Precision spectroscopy of pionic atoms and chiral symmetry in nuclei.

Author

Itahashi, Kenta, DeukSoon Ahn, Masanori Dozono, Naoki Fukuda, Nobuhisa Fukunishi, Tadashi Hashimoto, Naoto Inabe, Masahiko Iwasaki, Daisuke Kameda, Toshiyuki Kubo, Kensuke Kusaka, Daichi Murai, Takahiro Nishi, Naruhiko Sakamoto, Hiroshi Suzuki, Hiroyuki Takeda, Tomohiro Uesaka, Yoshiyuki Yanagisawa, Koichi Yoshida, and Keiichi Kisamori

Subjects
*CHIRALITY of nuclear particles, *PIONS, *PHYSICS research, *MESONS, PION spectra
Abstract

We conduct an experimental project to make spectroscopy of deeply bound pionic atoms systematically over wide range of nuclei. We aim at studying the strong interaction in the low energy region, which has close connection to spontaneous chiral symmetry breaking and its partial restoration in nuclear matter. First experimental results show improved spectral resolution and much better statistical sensitivity than previous experiments. Present status of the experiment is reported. [ABSTRACT FROM AUTHOR]

Published
2016
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14. Precision spectroscopy of pionic atoms and chiral symmetry in nuclei

Author

Daichi Murai, Ryugo S. Hayano, Y. Kiyokawa, N. Inabe, Toshiyuki Kubo, DeukSoon Ahn, Kenta Itahashi, Emma Haettner, Hiroshi Horii, Hiroyuki Takeda, Naruhiko Sakamoto, T. Uesaka, Hiroshi Suzuki, Kensuke Kusaka, Yasumori Wada, Masanori Dozono, Shouichiro Kawase, Nobuhisa Fukunishi, T. Hashimoto, Kimiko Sekiguchi, Yoshiki Tanaka, M. Iwasaki, Yuni N. Watanabe, Helmut Weick, D. Etoh, G. P. A. Berg, Satoru Hirenzaki, Shin'ichiro Michimasa, H. Yamakami, Go Mishima, Hiroyuki Miya, S. Ota, N. Ikeno, Masafumi Matsushita, Hiroyuki Fujioka, Takahiro Nishi, Motonobu Takaki, Hideko Nagahiro, Yoshiyuki Yanagisawa, Ken Suzuki, K. Kisamori, Naoki Fukuda, Daisuke Kameda, Koichi Yoshida, and Hans Geissel

Subjects
QC1-999, Strong interaction, 01 natural sciences, pi-: mesic atom, mesic atom [pi-], low [energy], 0103 physical sciences, ddc:530, Symmetry breaking, 010306 general physics, Spectroscopy, energy: low, Physics, Range (particle radiation), 010308 nuclear & particles physics, strong interaction, symmetry breaking: chiral, sensitivity, Nuclear matter, Symmetry (physics), nuclear matter, Chirality (mathematics), chiral [symmetry breaking], Atomic physics, Chiral symmetry breaking
Abstract

14th International Workshop on Meson Production, Properties and Interaction, Cracow, Poland, 2 Jun 2016 - 7 Jun 2016; The European physical journal / Web of Conferences Web of Conferences : proceedings proceedings 130, 01017 (2016). doi:10.1051/epjconf/201613001017, We conduct an experimental project to make spectroscopy of deeply bound pionic atoms systematically over wide range of nuclei. We aim at studying the strong interaction in the low energy region, which has close connection to spontaneous chiral symmetry breaking and its partial restoration in nuclear matter. First experimental results show improved spectral resolution and much better statistical sensitivity than previous experiments. Present status of the experiment is reported., Published by EDP Sciences, Les Ulis

Published
2016

15. Spallation reaction study for the long-lived fission product 107Pd.

Author

He Wang, Hideaki Otsu, Hiroyoshi Sakurai, DeukSoon Ahn, Masayuki Aikawa, Takashi Ando, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Doornenbal, Pieter, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Shoichiro Kawase, Tadahiro Kin, Yosuke Kondo, Shunpei Koyama, Shigeru Kubono, Yukie Maeda, and Ayano Makinaga

Published
2017
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