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231 results on '"Han, Z. Y."'

1. The $^{59}$Fe(n, {\gamma})$^{60}$Fe Cross Section from the Surrogate Ratio Method and Its Effect on the $^{60}$Fe Nucleosynthesis

Author

Yan, S. Q., Li, X. Y., Nishio, K., Lugaro, M., Li, Z. H., Makii, H., Pignatari, M., Wang, Y. B., Orlandi, R., Hirose, K., Tsukada, K., Mohr, P., Li, G. S., Wang, J. G., Gao, B. S., Han, Y. L., Guo, B., Li, Y. J., Shen, Y. P., Sato, T. K., Ito, Y., Suzaki, F., Su, J., Yang, Y. Y., Wang, J. S., Ma, J. B., Ma, P., Bai, Z., Xu, S. W., Ren, J., Fan, Q. W., Zeng, S., Han, Z. Y., Nan, W., Nan, W. K., Chen, C., Lian, G., Hu, Q., Duan, F. F., Jin, S. Y., Tang, X. D., and Liu, W. P.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The long-lived $^{60}$Fe (with a half-life of 2.62 Myr) is a crucial diagnostic of active nucleosynthesis in the Milky Way galaxy and in supernovae near the solar system. The neutron-capture reaction $^{59}$Fe(n,$\gamma$)$^{60}$Fe on $^{59}$Fe (half-life = 44.5 days) is the key reaction for the production of $^{60}$Fe in massive stars. This reaction cross section has been previously constrained by the Coulomb dissociation experiment, which offered partial constraint on the $E$1 $\gamma$-ray strength function but a negligible constraint on the $M$1 and $E$2 components. In this work, for the first time, we use the surrogate ratio method to experimentally determine the $^{59}$Fe(n,$\gamma$)$^{60}$Fe cross sections in which all the components are included. We derived a Maxwellian-averaged cross section of 27.5 $\pm$ 3.5 mb at $kT$= 30 keV and 13.4 $\pm$ 1.7 mb at $kT$= 90 keV, roughly 10 - 20% higher than previous estimates. We analyzed the impact of our new reaction rates in nucleosynthesis models of massive stars and found that uncertainties in the production of $^{60}$Fe from the $^{59}$Fe(n,$\gamma$)$^{60}$Fe rate are at most of 25%. We conclude that stellar physics uncertainties now play a major role in the accurate evaluation of the stellar production of $^{60}$Fe., Comment: 9 pages with 6 figures

Published
2021
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2. Experimental Study on Contact Heating Method in Solid Solution Process of Aluminum Alloy

Author

An, B. Q., Xie, H. Y., Sun, Y. P., Yang, H. H., Zhao, Y. H., Zhu, W. D., Han, Z. Y., Zhang, Z. Q., Xiao, Shengxiong, Editor-in-Chief, Bassir, David, Series Editor, Gao, Bingbing, Series Editor, Jiang, Yongchao, Series Editor, Li, Jia, Series Editor, Mazumdar, Sayantan, Series Editor, Sun, Qijun, Series Editor, Tang, Juntao, Series Editor, Xiong, Chuanyin, Series Editor, Xu, Hexiu, Series Editor, Yang, Jun, Series Editor, Zhang, Yisheng, editor, and Ma, Mingtu, editor

Published
2023
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3. Hot Stamping of Zn-Coated PHS Steel Using Atomization Precooling Technology

Author

Xie, H. Y., An, B. Q., Geng, Y. Z., Sun, Y. P., Yang, H. H., Zhao, Y. H., Zhu, W. D., Xia, Y. X., Han, Z. Y., Xiao, Shengxiong, Editor-in-Chief, Bassir, David, Series Editor, Gao, Bingbing, Series Editor, Jiang, Yongchao, Series Editor, Li, Jia, Series Editor, Mazumdar, Sayantan, Series Editor, Sun, Qijun, Series Editor, Tang, Juntao, Series Editor, Xiong, Chuanyin, Series Editor, Xu, Hexiu, Series Editor, Yang, Jun, Series Editor, Zhang, Yisheng, editor, and Ma, Mingtu, editor

Published
2023
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4. Astrophysical $S_{E2}$ factor of the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction through the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ transfer reaction

Author

Shen, Y. P., Guo, B., Li, Z. H., Li, Y. J., Pang, D. Y., Adhikari, S., An, Z. D., Su, J., Yan, S. Q., Du, X. C., Fan, Q. W., Gan, L., Han, Z. Y., Li, D. H., Li, E. T., Lian, G., Liu, J. C., Ma, T. L., Pei, C. J., Su, Y., Wang, Y. B., Zhou, Y., and Liu, W. P.

Subjects
Nuclear Experiment
Abstract

The ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction plays a key role in the evolution of stars with masses of $M >$ 0.55 $M_\odot$. The cross-section of the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction within the Gamow window ($E_\textrm{c.m.}$ = 300 keV, $T_\textrm9$ = 0.2) is extremely small (about $10^{-17}$ barn), which makes the direct measurement in a ground-based laboratory with existing techniques unfeasible. Up until now, the cross-sections at lower energies can only be extrapolated from the data at higher energies. However, two subthreshold resonances, located at $E_x$ = 7.117 MeV and $E_x$ = 6.917 MeV, make this extrapolation more complicated. In this work, the 6.917 MeV subthreshold resonance in the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction was investigated via the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ reaction. The experiment was performed using the Q3D magnetic spectrograph at the HI-13 tandem accelerator. We measured the angular distribution of the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ transfer reaction leading to the 6.917 MeV state. Based on the FRDWBA analysis, we derived the asymptotic normalization coefficient (ANC) of the 6.917 MeV level in $^{16}$O to be (1.10 $\pm$ 0.29) $\times 10^{10}$ fm$^{-1}$, with which the reduced $\alpha$ width was computed to be $18.0\pm4.7$ keV at the channel radius of 6.5 fm. Finally, we calculated the astrophysical $S_{E2}(300)$ factor of the ground-state transitions to be 46.2 $\pm$ 7.7 keV b. The result for the astrophysical $S_{E2}(300)$ factor confirms the values obtained in various direct and indirect measurements and presents an independent examination of the most important data in nuclear astrophysics., Comment: submitted to Physical Review C

Published
2018
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5. Progress of Underground Nuclear Astrophysics Experiment JUNA in China

Author

Liu, W. P., Li, Z. H., He, J. J., Tang, X. D., Lian, G., Su, J., Shen, Y. P., An, Z., Chao, F. Q., Chang, J. J., Chen, L. H., Chen, H., Chen, X. J., Chen, Y. H., Chen, Z. J., Cui, B. Q., Du, X. C., Fang, X., Fu, C. B., Gan, L., Guo, B., Han, Z. Y., Guo, X. Y., He, G. Z., He, J. R., Heger, A., Hou, S. Q., Huang, H. X., Huang, N., Jia, B. L., Jiang, L. Y., Kubono, S., Li, J. M., Li, M. C., Li, K. A., Li, E. T., Li, T., Li, Y. J., Lugaro, M., Luo, X. B., Ma, H. Y., Ma, S. B., Mei, D. M., Nan, W., Nan, W. K., Qi, N. C., Qian, Y. Z., Qin, J. C., Ren, J., Shang, C. S., Sun, L. T., Sun, W. L., Tan, W. P., Tanihata, I., Wang, S., Wang, P., Wang, Y. B., Wu, Q., Xu, S. W., Yan, S. Q., Yang, L. T., Yang, Y., Yu, X. Q., Yue, Q., Zeng, S., Zhang, L., Zhang, H., Zhang, H. Y., Zhang, L. Y., Zhang, N. T., Zhang, P., Zhang, Q. W., Zhang, T., Zhang, X. P., Zhang, X. Z., Zhao, W., Zhou, J. F., and Zhou, Y.

Published
2022
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6. ANALYSIS OF DESALINATION EFFECT OF VARIOUS IMPROVEMENT MEASURES ON THE INTERLAYER OF HEAVILY SALINE-ALKALI SOIL.

Author

LIU, H. B., WU, B., ZHANG, J. H., BAI, Y. G., ZHENG, M., DING, Y., XIAO, J., and HAN, Z. Y.

Subjects
SOIL moisture, SOIL infiltration, SOILS, SOIL salinity, SALINE waters
Abstract

This paper takes the interlayer soil of heavy saline-alkali soil in Weigan River Irrigation Demonstration base in Aksu District, Xinjiang Province, China as the research object. Through field plot tests, the changes of soil water and salt under different years and winter irrigation quota of 4725 mm·ha-1 were studied. Analysis revealed that, after three rounds of irrigation, the control (CK) treatment exhibited soil moisture content 1.4%-16.2% and 2.3%-15.5% higher than that of other treatments at 60-80 cm and 0-100 cm, respectively. Among all treatments, G1 exhibited the highest desalination rate of 75.9%, followed by G6 and G3 at 51.5% and 39.4%, respectively, whereas G2 and G5 were relatively similar at 38.2% and 37.4%, respectively, and G4 showed the lowest desalination rate of 33.9%. Significant desalination effects were observed after two and three winter irrigations, particularly in the 0-20 cm soil layer where salt content decreased from 7.06-11.61 g kg-1 before irrigation in 2020 to 2.00-5.91 g kg-1 after irrigation in 2022. The desalination rate was between 76.8% and 382.5%, which improved the surface soil from the initial medium to moderate saline-alkali soil to light to moderate saline-alkali soil. The research findings that improvement measures can enhance soil water infiltration and improve soil desalination efficiency. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Astrophysical N15(n,γ)N16 reaction rate from precision measurement of the N15(d,p)N16 angular distributions

Author

Li, X. Y., primary, Guo, B., additional, Li, Z. H., additional, Li, Y. J., additional, Su, J., additional, Pang, D. Y., additional, He, J. J., additional, Yan, S. Q., additional, Fan, Q. W., additional, Liu, J. C., additional, Gan, L., additional, Han, Z. Y., additional, Li, E. T., additional, Lian, G., additional, Shen, Y. P., additional, Wang, Y. B., additional, Zeng, S., additional, and Liu, W. P., additional

Published
2022
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18. The 59Fe (n,γ) 60Fe Cross Section from the Surrogate Ratio Method and Its Effect on the 60Fe Nucleosynthesis

Author

Yan, S. Q., primary, Li, X. Y., additional, Nishio, K., additional, Lugaro, M., additional, Li, Z. H., additional, Makii, H., additional, Pignatari, M., additional, Wang, Y. B., additional, Orlandi, R., additional, Hirose, K., additional, Tsukada, K., additional, Mohr, P., additional, Li, G. S., additional, Wang, J. G., additional, Gao, B. S., additional, Han, Y. L., additional, Guo, B., additional, Li, Y. J., additional, Shen, Y. P., additional, Sato, T. K., additional, Ito, Y., additional, Suzaki, F., additional, Su, J., additional, Yang, Y. Y., additional, Wang, J. S., additional, Ma, J. B., additional, Ma, P., additional, Bai, Z., additional, Xu, S. W., additional, Ren, J., additional, Fan, Q. W., additional, Zeng, S., additional, Han, Z. Y., additional, Nan, W., additional, Nan, W. K., additional, Chen, C., additional, Lian, G., additional, Hu, Q., additional, Duan, F. F., additional, Jin, S. Y., additional, Tang, X. D., additional, and Liu, W. P., additional

Published
2021
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23. The $^{59}$Fe(n, ��)$^{60}$Fe Cross Section from the Surrogate Ratio Method and Its Effect on the $^{60}$Fe Nucleosynthesis

Author

Yan, S. Q., Li, X. Y., Nishio, K., Lugaro, M., Li, Z. H., Makii, H., Pignatari, M., Wang, Y. B., Orlandi, R., Hirose, K., Tsukada, K., Mohr, P., Li, G. S., Wang, J. G., Gao, B. S., Han, Y. L., Guo, B., Li, Y. J., Shen, Y. P., Sato, T. K., Ito, Y., Suzaki, F., Su, J., Yang, Y. Y., Wang, J. S., Ma, J. B., Ma, P., Bai, Z., Xu, S. W., Ren, J., Fan, Q. W., Zeng, S., Han, Z. Y., Nan, W., Nan, W. K., Chen, C., Lian, G., Hu, Q., Duan, F. F., Jin, S. Y., Tang, X. D., and Liu, W. P.

Subjects
Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences
Abstract

The long-lived $^{60}$Fe (with a half-life of 2.62 Myr) is a crucial diagnostic of active nucleosynthesis in the Milky Way galaxy and in supernovae near the solar system. The neutron-capture reaction $^{59}$Fe(n,$��$)$^{60}$Fe on $^{59}$Fe (half-life = 44.5 days) is the key reaction for the production of $^{60}$Fe in massive stars. This reaction cross section has been previously constrained by the Coulomb dissociation experiment, which offered partial constraint on the $E$1 $��$-ray strength function but a negligible constraint on the $M$1 and $E$2 components. In this work, for the first time, we use the surrogate ratio method to experimentally determine the $^{59}$Fe(n,$��$)$^{60}$Fe cross sections in which all the components are included. We derived a Maxwellian-averaged cross section of 27.5 $\pm$ 3.5 mb at $kT$= 30 keV and 13.4 $\pm$ 1.7 mb at $kT$= 90 keV, roughly 10 - 20% higher than previous estimates. We analyzed the impact of our new reaction rates in nucleosynthesis models of massive stars and found that uncertainties in the production of $^{60}$Fe from the $^{59}$Fe(n,$��$)$^{60}$Fe rate are at most of 25%. We conclude that stellar physics uncertainties now play a major role in the accurate evaluation of the stellar production of $^{60}$Fe., 9 pages with 6 figures

Published
2021
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25. Effect of application of iron (Fe) and α-ketoglutaric acid on growth, photosynthesis, and Fe content in fragrant rice seedlings.

Author

CHENG, S. R., LI, S. S., LIANG, Z. W., HUANG, F. C., WU, X. Q., HAN, Z. Y., HUANG, X. B., HUANG, X. M., and REN, Y.

Subjects
IRON, SEEDLINGS, PHOTOSYNTHESIS, MASS shootings, POTTING soils
Abstract

At a three-leaf stage, two Fe treatments [0 mg kg-1(Fe-) and 20 mg·kg-1 (Fe+) in the form of FeCl3] were used in the soil of the pot and then two concentrations of a-ketoglutaric acid [0 mg L-1 (A-) and 50 mg L-1 (A+)] were sprayed to the rice plants of Meixiangzhan and Yuxiangyouzhan cultivars. We showed that seedlings exhibited an increased length and fresh and dry mass of shoots and roots with treatments Fe+A- and Fe-A+, as well as the Fe content increased greatly. Both treatments increased the morphological characteristic values of roots and promoted photosynthesis. Interestingly, Fe+A+ notably affected the photosynthesis of fragrant rice seedlings; however, it exerted no significant differences on other parameters. Overall, Fe and α-ketoglutaric acid had the potential for improving the growth of fragrant rice seedlings. The interaction between Fe and α-ketoglutaric acid regulated photosynthesis in seedling leaves, which provided evidence for further improvement of rice cultivation. [ABSTRACT FROM AUTHOR]

Published
2022
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36. Brønsted Base and Acid Catalysts, and Additional Topics

Author

Maruoka, K., primary, Nagasawa, K., additional, Sohtome, Y., additional, Singh, R. P., additional, Deng, L., additional, Jang, H. B., additional, Oh, J. S., additional, Song, C. E., additional, Akiyama, T., additional, Terada, M., additional, Momiyama, N., additional, Hashimoto, T., additional, Hof, K., additional, Lippert, K. M., additional, Schreiner, P. R., additional, Uraguchi, D., additional, Ooi, T., additional, Inokuma, T., additional, Takemoto, Y., additional, Park, H. -g., additional, Shirakawa, S., additional, Maruoka, K., additional, Pápai, I., additional, Klussmann, M., additional, Itsuno, S., additional, Haraguchi, N., additional, Han, Z. -Y., additional, Wang, C., additional, Gong, L. -Z., additional, Duschmalé, J., additional, Arakawa, Y., additional, Wennemers, H., additional, Chen, Y. -C., additional, Cui, H. -L., additional, Izawa, K., additional, Torii, T., additional, Nishikawa, T., additional, Imai, H., additional, and List, B., additional

Published
2012
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46. Indirect measurement of the 57.7 keV resonance strength for the astrophysical γ -ray source of the Mg25(p,γ)Al26 reaction

Author

Li, Y. J., primary, Li, Z. H., additional, Li, E. T., additional, Li, X. Y., additional, Ma, T. L., additional, Shen, Y. P., additional, Liu, J. C., additional, Gan, L., additional, Su, Y., additional, Qiao, L. H., additional, Han, Z. Y., additional, Zhou, Y., additional, Su, J., additional, Yan, S. Q., additional, Zeng, S., additional, Wang, Y. B., additional, Guo, B., additional, Lian, G., additional, Nan, D., additional, Bai, X. X., additional, and Liu, W. P., additional

Published
2020
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47. Constraining the External Capture to the O16 Ground State and the E2 S Factor of the C12(α,γ)O16 Reaction

Author

Shen, Y. P., primary, Guo, B., additional, deBoer, R. J., additional, Li, Z. H., additional, Li, Y. J., additional, Tang, X. D., additional, Pang, D. Y., additional, Adhikari, S., additional, Basu, C., additional, Su, J., additional, Yan, S. Q., additional, Fan, Q. W., additional, Liu, J. C., additional, Chen, C., additional, Han, Z. Y., additional, Li, X. Y., additional, Lian, G., additional, Ma, T. L., additional, Nan, W., additional, Nan, W. K., additional, Wang, Y. B., additional, Zeng, S., additional, Zhang, H., additional, and Liu, W. P., additional

Published
2020
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48. Experimental study of the spectroscopic factors of Sn116–125

Author

Gan, L., primary, Sun, H. B., additional, Li, Z. H., additional, Hu, S. P., additional, Li, Y. J., additional, Su, J., additional, Guo, B., additional, Yan, S. Q., additional, Wang, Y. B., additional, Zeng, S., additional, Han, Z. Y., additional, Li, X. Y., additional, Li, D. H., additional, Ma, T. L., additional, Shen, Y. P., additional, Su, Y., additional, Li, E. T., additional, and Liu, W. P., additional

Published
2020
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