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Journal Articles

The LINACs simulation framework

Yee-Rendon, B.; Jameson, R. A.*; Okamura, Masahiro*; Li, C.*; Jiang, P.*; Maus, J. M.*

Proceedings of 32nd Linear Accelerator Conference (LINAC 2024) (Internet), p.492 - 495, 2024/10

LINACs is a simulation framework for designing optics and beam dynamics of charged particles in particle accelerators. LINACs is an open-source software that enables the user complete control over all design and simulation parameters of RFQs. This includes beam-driven design, fully 3D simulation using precise quadrupolar symmetry, and rigorous Poisson solution for external and space charge fields. The code can handle simultaneous particle beams with analytical input distributions and allows input beam scans. The software offers a relatively short running time and provides extensive analysis techniques. This work provides a historical overview of the code, presents results from RFQ models, and discusses future developments.

Journal Articles

Chiral Dirac fermion in a collinear antiferromagnet

Zhang, A.*; Deng, K.*; Sheng, J.*; Liu, P.*; Kumar, S.*; Shimada, Kenya*; Jiang, Z.*; Liu, Z.*; Shen, D.*; Li, J.*; et al.

Chinese Physics Letters, 40(12), p.126101_1 - 126101_8, 2023/12

 Times Cited Count:11 Percentile:83.08(Physics, Multidisciplinary)

Journal Articles

First observation of $$^{28}$$O

Kondo, Yosuke*; Achouri, N. L.*; Al Falou, H.*; Atar, L.*; Aumann, T.*; Baba, Hidetada*; Boretzky, K.*; Caesar, C.*; Calvet, D.*; Chae, H.*; et al.

Nature, 620(7976), p.965 - 970, 2023/08

 Times Cited Count:27 Percentile:94.86(Multidisciplinary Sciences)

no abstracts in English

Journal Articles

Two-dimensional quantum universality in the spin-1/2 triangular-lattice quantum antiferromagnet Na$$_{2}$$BaCo(PO$$_{4}$$)$$_{2}$$

Sheng, J.*; Wang, L.*; Candini, A.*; Jiang, W.*; Huang, L.*; Xi, B.*; Zhao, J.*; Ge, H.*; Zhao, N.*; Fu, Y.*; et al.

Proceedings of the National Academy of Sciences of the United States of America, 119(51), p.e2211193119_1 - e2211193119_9, 2022/12

 Times Cited Count:30 Percentile:93.24(Multidisciplinary Sciences)

Journal Articles

Formation of $$alpha$$ clusters in dilute neutron-rich matter

Tanaka, Junki*; Yang, Z.*; Typel, S.*; Adachi, Satoshi*; Bai, S.*; van Beek, P.*; Beaumel, D.*; Fujikawa, Yuki*; Han, J.*; Heil, S.*; et al.

Science, 371(6526), p.260 - 264, 2021/01

 Times Cited Count:72 Percentile:99.32(Multidisciplinary Sciences)

By employing quasi-free $$alpha$$-cluster-knockout reactions, we obtained direct experimental evidence for the formation of $$alpha$$ clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between $$alpha$$-cluster formation and the neutron skin.

Journal Articles

Spectroscopy of $$^{257}$$Rf

Qian, J.*; Heinz, A.*; Khoo, T. L.*; Janssens, R. V. F.*; Peterson, D.*; Seweryniak, D.*; Ahmad, I.*; Asai, Masato; Back, B. B.*; Carpenter, M. P.*; et al.

Physical Review C, 79(6), p.064319_1 - 064319_13, 2009/06

 Times Cited Count:35 Percentile:85.51(Physics, Nuclear)

$$alpha$$-, $$gamma$$-, and conversion electron spectroscopy experiments for $$^{257}$$Rf have been performed using Fragment Mass Analyzer at Argonne National Laboratory. A new isomer with a half-life of 160 $$mu$$s has been discovered in $$^{257}$$Rf, and it is interpreted as a three-quasiparticle high-$$K$$ isomer. Neutron configurations of one-quasiparticle states in $$^{253}$$No, the $$alpha$$-decay daughter of $$^{257}$$Rf, have been assigned on the basis of $$alpha$$-decay hindrance factors. Excitation energies of the 1/2$$^{+}$$[620] states in $$N$$=151 isotones indicate that the deformed shell gap at $$N$$=152 increases with the atomic number.

Oral presentation

Effect of cryogenic temperature on strain and plastic deformation evolution in impacted fractures of high manganese austenitic steel using neutron Bragg-edge imaging and electron back scattering diffraction

Jiang, L.*; Wang, H. H.*; Xu, P. G.; Su, Y. H.; Shinohara, Takenao; Wang, Y. W.*

no journal, , 

High manganese austenitic steels as a cryogenic structural material are widely applied in the pressurized storage infrastructures for storing and transporting liquefied natural gas (LNG), liquefied hydrogen (LH). Considering that cryogenic impact toughness is important in predicting the service performance of high manganese austenitic steel, it is critical for analyzing residual strain and plastic deformation evolution in impacted fractures and for deeply understanding the deformation and fracture mechanisms. Here, the strain and plastic deformation evolution of impacted fractures in high manganese steel (24Mn-4Cr-0.4C-0.3Cu) were comparably investigated by neutron Bragg-edge transmission (BET) imaging and electron back scattering diffraction (EBSD) at various cryogenic temperatures. The BET results show that the residual strain $$varepsilon$$111 is negative and $$varepsilon$$200 is positive in the region with large plastic deformation near the fracture. However, $$varepsilon$$111 and $$varepsilon$$200 in the region far away from the fracture show similar distribution in the V-notched impact sample at the same temperature. With the decrease of impact temperature, the high broadening area of Bragg-edge width near the fracture gradually decreased, revealing that the local plastic strain during cryogenic impact deformation in the corresponding area decreased, which is primarily consistent in the change trend of impact toughness value obtained at various temperatures. EBSD results show evident difference in the local distribution density of $$<$$111$$>$$ and $$<$$200$$>$$-oriented grains in the region near the fracture after cryogenic impacting. It is suggested that the steel texture is a primary reason for clarifying the different distribution features of $$varepsilon$$111 and $$varepsilon$$200 in the region near the cryogenic impact fracture.

Oral presentation

Evaluation of strain distribution in cold bent high-Mn steel plate with heterogenous microstructure

Xu, P. G.; Jiang, L.*; Zhang, S. C.*; Nasu, Shota*; Su, Y. H.; Iwamoto, Chihiro*; Wang, H. H.*; Hama, Takayuki*; Shobu, Takahisa

no journal, , 

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