Cryogenic-to-ambient evolution of hetero-deformation-induced strengthening in dual-phase medium-entropy alloys

Ha, H.*; Kim, J.*; Gu, G. H.*; Harjo, S.; Gong, W.; Hong, S.-J.*; Kim, H. S.*

Materials Characterization, 234, p.116086_1 - 116086_12, 2026/04

https://doi.org/10.1016/j.matchar.2026.116086

How to start a network? Experience in networking and achievements of the IRPA Young Generation Network

Andresz, S.*; Betos, C. M.*; Ha, W. H.*; Hamida, T.*; Hussain, B. S.*; Kabrt, F.*; Nusrat, O.*; Michaelidesova, A.*; Lima, T. V.*; Movsisyan, N.*; et al.

Annals of the ICRP, 53(1_Suppl), p.38 - 45, 2024/12

https://doi.org/10.1177/01466453241283931f

Since its establishment in 2018, the IRPA (International Radiation Protection Association) Young Generation Network (YGN) has created several dynamics under the framework of its Strategic Agenda to promote the representation of the young generation, professional development, experience transfer, relationship and communication of students, young professionals and scientists in radiation protection and its allied fields. This article first reports on the activities performed from 2018 until today, with highlights on some important events, collaborations and publications. The IRPA YGN have made these achievements with the essential support of its Leadership Committee, the various national Young Generation Networks, and the IRPA organization and its Associate Societies. Then, the insights and experiences obtained from these activities are discussed and used to inform how the IRPA YGN aims to achieve its on-going activities and continue to follow the ways paved in the Strategic Agenda 2022-2024. It is expected that the identification of the backbone elements supporting a young generation network and also the very specific challenges can be useful for the future management of the IRPA YGN and existing national YGN and inspire the creation of other young generation networks.

Low spin spectroscopy of neutron-rich Cl via and decay

Tripathi, V.*; Bhattacharya, S.*; Rubino, E.*; Benetti, C.*; Perello, J. F.*; Tabor, S. L.*; Liddick, S. N.*; Bender, P. C.*; Carpenter, M. P.*; Carroll, J. J.*; et al.

Physical Review C, 109(4), p.044320_1 - 044320_15, 2024/04

https://doi.org/10.1103/PhysRevC.109.044320

no abstracts in English

Predictive and inverse modeling of a radionuclide diffusion experiment in crystalline rock at ONKALO (Finland)

Soler, J. M.*; Keklinen, P.*; Pulkkanen, V.-M.*; Moreno, L.*; Iraola, A.*; Trinchero, P.*; Hokr, M.*; ha, J.*; Havlov, V.*; Trpkoov, D.*; et al.

Nuclear Technology, 209(11), p.1765 - 1784, 2023/11

https://doi.org/10.1080/00295450.2023.2209234

Modelling of the LTDE-SD radionuclide diffusion experiment in crystalline rock at the sp Hard Rock Laboratory (Sweden)

Soler, J. M.*; Meng, S.*; Moreno, L.*; Neretnieks, I.*; Liu, L.*; Keklinen, P.*; Hokr, M.*; ha, J.*; Vetenk, A.*; Reimitz, D.*; et al.

Geologica Acta, 20(7), 32 Pages, 2022/07

https://doi.org/10.1344/GeologicaActa2022.20.7

Task 9B of the SKB Task Force on Modelling of Groundwater Flow and Transport of Solutes in fractured rock focused on the modelling of experimental results from the LTDE-SD in situ tracer test performed at the sp Hard Rock Laboratory in Sweden. Ten different modelling teams provided results for this exercise, using different concepts and codes. Three main types of modelling approaches were used: (1) analytical solutions to the transport-retention equations, (2) continuum-porous-medium numerical models, and (3) microstructure-based models accounting for small-scale heterogeneity (i.e. mineral grains and microfracture distributions). The modelling by the different teams allowed the comparison of many different model concepts, especially in terms of potential zonations of rock properties (porosity, diffusion, sorption), such as the presence of a disturbed zone at the rock and fracture surface, the potential effects of micro- and cm-scale fractures.

Overview and main outcomes of the pool scrubbing lumped-parameter code benchmark on hydrodynamic aspects in IPRESCA project

Marchetto, C.*; Ha, K. S*; Herranz, L. E.*; Hirose, Yoshiyasu; Jankowski, T.*; Lee, Y.*; Nowack, H.*; Pellegrini, M.*; Sun, X.*

Proceedings of 19th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19) (Internet), 17 Pages, 2022/03

The IRPA Young Generation Network; Activity report from the middle of 2018 to the beginning of 2021

Andresz, S.*; Sakoda, Akihiro; Ha, W.-H.*; Kabrt, F.*; Kono, Takahiko; Sez Muoz, M.*; Nusrat, O.*; Papp, C.*; Qiu, R.*; Bryant, P.*

Journal of Radiation Protection and Research, 46(3), p.143 - 150, 2021/09

https://doi.org/10.14407/jrpr.2021.00080

The Young Generation Network (YGN) was officially established as part of the International Radiation Protection Association (IRPA) in the spring of 2018. Since then, it has been dedicated to a variety of activities to promote communication, collaboration and professional development of students and young professionals in the area of radiation protection and its allied fields. This article reports our recent activities from the middle of 2018 to the beginning of 2021, with highlights on some important events: (1) Joint JHPS-SRP-KARP Workshop of Young Generation Network (December 2019 in Japan); (2) Contribution to Nuclear Energy Agency Workshop on Optimization - Rethinking the Art of Reasonable (January 2020 in Portugal); (3) Survey on the impact of COVID-19 on radiation protection among IRPA YGN members (March 2020); (4) Contribution to IRPA15 (January-February 2021; online). The discussion and insight obtained from each activity are also summarized. The IRPA YGN will aim to achieve its on-going activities and continue to follow the ways paved in the Strategic Agenda and despite the challenges raised by the COVID-19 pandemic. Namely, running an international survey (for example, on the usage of social media in radiation protection, and on the long-term consequences of the COVID-19 pandemic), engaging national YGNs, extending the network, finding new relationships with networks with an interest in the young generation and participation in (remote) events will be aspired for.

Mechanism of hardening and damage initiation in oxygen embrittlement of body-centred-cubic niobium

Yang, P.-J.*; Li, Q.-J.*; Tsuru, Tomohito; Ogata, Shigenobu*; Zhang, J.-W.*; Sheng, H.-W.*; Shan, Z.-W.*; Sha, G.*; Han, W.-Z.*; Li, J.*; et al.

Acta Materialia, 168, p.331 - 342, 2019/04

https://doi.org/10.1016/j.actamat.2019.02.030

Body-centred-cubic metallic materials, such as niobium (Nb) and other refractory metals, are prone to embrittlement due to low levels of oxygen solutes. The mechanisms responsible for the oxygen-induced rampant hardening and damage are unclear. Here we illustrate that screw dislocations moving through a random repulsive force field imposed by impurity oxygen interstitials readily form cross-kinks and emit excess vacancies in Nb. The vacancies bind strongly with oxygen and screw dislocation in a three-body fashion, rendering dislocation motion difficult and hence pronounced dislocation storage and hardening. This leads to unusually high strain hardening rates and fast breeding of nano-cavities that underlie damage and failure.

Quantitative characterization of the nanoscale local lattice strain induced by Sr dopants in LaSrCuO

Lin, J. Q.*; Liu, X.*; Blackburn, E.*; Wakimoto, Shuichi; Ding, H.*; Islam, Z.*; Sinha, S. K.*

Physical Review Letters, 120(19), p.197001_1 - 197001_6, 2018/05

https://doi.org/10.1103/PhysRevLett.120.197001

The nanometer scale lattice deformation brought about by the dopants in the high temperature superconducting cuprate LaSrCuO was investigated by measuring the associated X-ray diffuse scattering around multiple Bragg peaks. Our results address the long-term concern of dopant introduced local lattice inhomogeneity, and show that the associated nanometer scale lattice deformation is marginal and cannot be responsible for the patched variation in the spectral gaps observed with scanning tunneling microscopy in the cuprates.

Coupled bunch instability and its cure at J-PARC RCS

Shobuda, Yoshihiro; Saha, P. K.; Hotchi, Hideaki; Harada, Hiroyuki; Takayanagi, Tomohiro; Tamura, Fumihiko; Tani, Norio; Togashi, Tomohito; Toyama, Takeshi*; Watanabe, Yasuhiro; et al.

Proceedings of 8th International Particle Accelerator Conference (IPAC '17) (Internet), p.2946 - 2949, 2017/05

https://doi.org/10.18429/JACoW-IPAC2017-WEPIK014

no abstracts in English