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Journal Articles

Production cross-sections of residual nuclides from $$^{93}$$Zr + $$p$$ at 27 MeV/nucleon

Hwang, J.*; Chillery, T.*; Dozono, Masanori*; Imai, Nobuaki*; Michimasa, Shinichiro*; Sumikama, Toshiyuki*; Chiga, Nobuyuki*; Ota, Shinsuke*; Nakayama, Shinsuke; 49 of others*

Progress of Theoretical and Experimental Physics (Internet), 2024(9), p.093D03_1 - 093D03_12, 2024/09

 Times Cited Count:0 Percentile:0.00(Physics, Multidisciplinary)

Nuclear transmutation emerges as a promising approach for reprocessing high-level waste, specifically treating long-lived nuclides like $$^{93}$$Zr from spent fuel. It is essential to accumulate reaction data for these nuclei to advance this prominent treatment and to build a comprehensive understanding of reaction mechanisms. In this study, the residual production cross-sections resulting from proton-induced reactions on $$^{93}$$Zr were measured at 27 MeV/nucleon in inverse kinematics. At the RIKEN-RIBF facility the OEDO beamline was used to deduce production cross-sections for isotopes, $$^{91-93}$$Nb, $$^{91,92}$$Zr, and $$^{88,89}$$Y. Comparing the results from this study and prior research with calculated excitation functions, a moderate agreement is found with theoretical predictions derived from TALYS and CCONE. Despite the potential limitations of low-energy proton-induced reactions for $$^{93}$$Zr transmutation, the measured cross-sections offer valuable insights for future considerations in nuclear-waste treatment facilities. This is particularly relevant for facilities exploring innovative methods, such as accelerator-driven systems.

Journal Articles

Compound-nucleus and doorway-state decays of $$beta$$-delayed neutron emitters $$^{51,52.53}$$K

Xu, Z. Y.*; Grzywacz, R.*; Andreyev, A. N.; 49 of others*

Physical Review Letters, 133(4), p.042501_1 - 042501_7, 2024/07

 Times Cited Count:1 Percentile:0.00(Physics, Multidisciplinary)

Journal Articles

Studying the impact of deuteron non-elastic breakup on $$^{93}$$Zr + d reaction cross sections measured at 28 MeV/nucleon

Chillery, T.*; Hwang, J.*; Dozono, Masanori*; Imai, Nobuaki*; Michimasa, Shinichiro*; Sumikama, Toshiyuki*; Chiga, Nobuyuki*; Ota, Shinsuke*; Nakayama, Shinsuke; 49 of others*

Progress of Theoretical and Experimental Physics (Internet), 2023(12), p.121D01_1 - 121D01_11, 2023/12

 Times Cited Count:4 Percentile:40.37(Physics, Multidisciplinary)

The deuteron is a loosely bound system which can easily break up into its constituent proton and neutron whilst in the presence of Coulomb and nuclear fields. Previous experimental studies have shown that this breakup process has a significant impact on residual nucleus production from deuteron bombardment in the high energy range of 50 - 210 MeV/nucleon. However, there remains a lack of cross-section data at energies below 50 MeV/nucleon. The current study determined $$^{93}$$Zr + d reaction cross sections under inverse kinematics at approximately 28 MeV/nucleon using the BigRIPS separator, OEDO beamline, and SHARAQ spectrometer. Cross sections from this research were compared with previous measurements and theoretical calculations. The experimental results show a large enhancement of the production cross sections of residual nuclei, especially those produced from a small number of particle emissions, compared to the proton-induced reaction data at similar bombarding energy. The DEURACS calculation, which quantitatively takes deuteron-breakup effects into account, reproduces the data well. As a long-lived fission product, $$^{93}$$Zr remains a challenge for nuclear waste disposal and treatment. This study's low-energy data may assist future consideration of nuclear-waste treatment facilities, where $$^{93}$$Zr + d may feasibly transmute the waste into short-lived/stable nuclei.

Journal Articles

Deformation versus sphericity in the ground states of the lightest gold isotopes

Cubiss, J. G.*; Andreyev, A. N.; 49 of others*

Physical Review Letters, 131(20), p.202501_1 - 202501_8, 2023/11

 Times Cited Count:8 Percentile:80.53(Physics, Multidisciplinary)

Journal Articles

Accelerator design for 1.3-MW beam power operation of the J-PARC Main Ring

Igarashi, Susumu*; Nomura, Masahiro; Tamura, Fumihiko; Yamamoto, Masanobu; Shimada, Taihei; 49 of others*

Progress of Theoretical and Experimental Physics (Internet), 2021(3), p.033G01_1 - 033G01_28, 2021/03

 Times Cited Count:9 Percentile:61.95(Physics, Multidisciplinary)

Journal Articles

Measurements of $$e^+e^-$$ pairs from open heavy flavor in $$p+p$$ and $$d+A$$ collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, A.*; Hasegawa, Shoichi; Imai, Kenichi; Nagamiya, Shoji; Sako, Hiroyuki; Sato, Susumu; Tanida, Kiyoshi; PHENIX Collaboration*; 497 of others*

Physical Review C, 96(2), p.024907_1 - 024907_19, 2017/08

AA2017-0466.pdf:2.14MB

 Times Cited Count:11 Percentile:61.84(Physics, Nuclear)

Journal Articles

Beamline test of a transition-edge-sensor spectrometer in preparation for kaonic-atom measurements

Hashimoto, Tadashi*; Tanida, Kiyoshi; 49 of others*

IEEE Transactions on Applied Superconductivity, 27(4), p.2100905_1 - 2100905_5, 2017/06

 Times Cited Count:12 Percentile:51.08(Engineering, Electrical & Electronic)

Journal Articles

Systematic study of charged-pion and kaon femtoscopy in Au + Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, A.*; Hasegawa, Shoichi; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Tanida, Kiyoshi; PHENIX Collaboration*; 493 of others*

Physical Review C, 92(3), p.034914_1 - 034914_21, 2015/09

AA2015-0712.pdf:1.48MB

 Times Cited Count:28 Percentile:82.31(Physics, Nuclear)

Oral presentation

TES application to kaonic atom X-ray spectroscopy in a charged-particle beamline

Hashimoto, Tadashi*; Tanida, Kiyoshi; 49 of others*

no journal, , 

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