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1. Measurement of absolute branching fractions of D s + $$ {\textrm{D}}_{\textrm{s}}^{+} $$ hadronic decays

Author

The BESIII collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, I. Balossino, Y. Ban, H.-R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. Bertani, D. Bettoni, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, J. F. Chang, G. R. Che, G. Chelkov, C. Chen, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. L. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Y. Q. Chen, Z. J. Chen, Z. Y. Chen, S. K. Choi, G. Cibinetto, F. Cossio, J. J. Cui, H. L. Dai, J. P. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, B. Ding, X. X. Ding, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, Z. H. Duan, P. Egorov, Y. H. Fan, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, Y. Q. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, Y. T. Feng, M. Fritsch, C. D. Fu, J. L. Fu, Y. W. Fu, H. Gao, X. B. Gao, Y. N. Gao, Yang Gao, S. Garbolino, I. Garzia, L. Ge, P. T. Ge, Z. W. Ge, C. Geng, E. M. Gersabeck, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, S. Gramigna, M. Greco, M. H. Gu, Y. T. Gu, C. Y. Guan, Z. L. Guan, A. Q. Guo, L. B. Guo, M. J. Guo, R. P. Guo, Y. P. Guo, A. Guskov, J. Gutierrez, K. L. Han, T. T. Han, X. Q. Hao, F. A. Harris, K. K. He, K. L. He, F. H. Heinsius, C. H. Heinz, Y. K. Heng, C. Herold, T. Holtmann, P. C. Hong, G. Y. Hou, X. T. Hou, Y. R. Hou, Z. L. Hou, B. Y. Hu, H. M. Hu, J. F. Hu, S. L. Hu, T. Hu, Y. Hu, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, T. Hussain, F. Hölzken, N. Hüsken, N. in der Wiesche, J. Jackson, S. Janchiv, J. H. Jeong, Q. Ji, Q. P. Ji, W. Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, X. Q. Jia, Z. K. Jia, D. Jiang, H. B. Jiang, P. C. Jiang, S. S. Jiang, T. J. Jiang, X. S. Jiang, Y. Jiang, J. B. Jiao, J. K. Jiao, Z. Jiao, S. Jin, Y. Jin, M. Q. Jing, X. M. Jing, T. Johansson, S. Kabana, N. Kalantar-Nayestanaki, X. L. Kang, X. S. Kang, M. Kavatsyuk, B. C. Ke, V. Khachatryan, A. Khoukaz, R. Kiuchi, O. B. Kolcu, B. Kopf, M. Kuessner, X. Kui, N. Kumar, A. Kupsc, W. Kühn, J. J. Lane, P. Larin, L. Lavezzi, T. T. Lei, Z. H. Lei, M. Lellmann, T. Lenz, C. Li, C. H. Li, Cheng Li, D. M. Li, F. Li, G. Li, H. B. Li, H. J. Li, H. N. Li, Hui Li, J. R. Li, J. S. Li, Ke Li, L. J. Li, L. K. Li, Lei Li, M. H. Li, P. R. Li, Q. M. Li, Q. X. Li, R. Li, S. X. Li, T. Li, W. D. Li, W. G. Li, X. Li, X. H. Li, X. L. Li, X. Z. Li, Xiaoyu Li, Y. G. Li, Z. J. Li, Z. X. Li, C. Liang, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, L. Z. Liao, J. Libby, A. Limphirat, C. C. Lin, D. X. Lin, T. Lin, B. J. Liu, B. X. Liu, C. Liu, C. X. Liu, F. H. Liu, Fang Liu, Feng Liu, G. M. Liu, H. Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Liu, L. C. Liu, Lu Liu, M. H. Liu, P. L. Liu, Q. Liu, S. B. Liu, T. Liu, W. K. Liu, W. M. Liu, X. Liu, Y. Liu, Y. B. Liu, Z. A. Liu, Z. D. Liu, Z. Q. Liu, X. C. Lou, F. X. Lu, H. J. Lu, J. G. Lu, X. L. Lu, Y. Lu, Y. P. Lu, Z. H. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, X. R. Lyu, Y. F. Lyu, F. C. Ma, H. Ma, H. L. Ma, J. L. Ma, L. L. Ma, M. M. Ma, Q. M. Ma, R. Q. Ma, X. T. Ma, X. Y. Ma, Y. Ma, Y. M. Ma, F. E. Maas, M. Maggiora, S. Malde, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. G. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, B. Moses, N. Yu. Muchnoi, J. Muskalla, Y. Nefedov, F. Nerling, L. S. Nie, I. B. Nikolaev, Z. Ning, S. Nisar, Q. L. Niu, W. D. Niu, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, P. Patteri, Y. P. Pei, M. Pelizaeus, H. P. Peng, Y. Y. Peng, K. Peters, J. L. Ping, R. G. Ping, S. Plura, V. Prasad, F. Z. Qi, H. Qi, H. R. Qi, M. Qi, T. Y. Qi, S. Qian, W. B. Qian, C. F. Qiao, X. K. Qiao, J. J. Qin, L. Q. Qin, L. Y. Qin, X. S. Qin, Z. H. Qin, J. F. Qiu, Z. H. Qu, C. F. Redmer, K. J. Ren, A. Rivetti, M. Rolo, G. Rong, Ch. Rosner, S. N. Ruan, N. Salone, A. Sarantsev, Y. Schelhaas, K. Schoenning, M. Scodeggio, K. Y. Shan, W. Shan, X. Y. Shan, Z. J. Shang, J. F. Shangguan, L. G. Shao, M. Shao, C. P. Shen, H. F. Shen, W. H. Shen, X. Y. Shen, B. A. Shi, H. Shi, H. C. Shi, J. L. Shi, J. Y. Shi, Q. Q. Shi, S. Y. Shi, X. Shi, J. J. Song, T. Z. Song, W. M. Song, Y. J. Song, Y. X. Song, S. Sosio, S. Spataro, F. Stieler, Y. J. Su, G. B. Sun, G. X. Sun, H. Sun, H. K. Sun, J. F. Sun, K. Sun, L. Sun, S. S. Sun, T. Sun, W. Y. Sun, Y. Sun, Y. J. Sun, Y. Z. Sun, Z. Q. Sun, Z. T. Sun, C. J. Tang, G. Y. Tang, J. Tang, Y. A. Tang, L. Y. Tao, Q. T. Tao, M. Tat, J. X. Teng, V. Thoren, W. H. Tian, Y. Tian, Z. F. Tian, I. Uman, Y. Wan, S. J. Wang, B. Wang, B. L. Wang, Bo Wang, D. Y. Wang, F. Wang, H. J. Wang, J. J. Wang, J. P. Wang, K. Wang, L. L. Wang, M. Wang, Meng Wang, N. Y. Wang, S. Wang, T. Wang, T. J. Wang, W. Wang, W. P. Wang, X. Wang, X. F. Wang, X. J. Wang, X. L. Wang, X. N. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. L. Wang, Y. N. Wang, Y. Q. Wang, Yaqian Wang, Yi Wang, Z. Wang, Z. L. Wang, Z. Y. Wang, Ziyi Wang, D. H. Wei, F. Weidner, S. P. Wen, Y. R. Wen, U. Wiedner, G. Wilkinson, M. Wolke, L. Wollenberg, C. Wu, J. F. Wu, L. H. Wu, L. J. Wu, X. Wu, X. H. Wu, Y. Wu, Y. H. Wu, Y. J. Wu, Z. Wu, L. Xia, X. M. Xian, B. H. Xiang, T. Xiang, D. Xiao, G. Y. Xiao, S. Y. Xiao, Y. L. Xiao, Z. J. Xiao, C. Xie, X. H. Xie, Y. Xie, Y. G. Xie, Y. H. Xie, Z. P. Xie, T. Y. Xing, C. F. Xu, C. J. Xu, G. F. Xu, H. Y. Xu, M. Xu, Q. J. Xu, Q. N. Xu, W. Xu, W. L. Xu, X. P. Xu, Y. C. Xu, Z. P. Xu, Z. S. Xu, F. Yan, L. Yan, W. B. Yan, W. C. Yan, X. Q. Yan, H. J. Yang, H. L. Yang, H. X. Yang, Tao Yang, Y. Yang, Y. F. Yang, Y. X. Yang, Yifan Yang, Z. W. Yang, Z. P. Yao, M. Ye, M. H. Ye, J. H. Yin, Z. Y. You, B. X. Yu, C. X. Yu, G. Yu, J. S. Yu, T. Yu, X. D. Yu, Y. C. Yu, C. Z. Yuan, J. Yuan, L. Yuan, S. C. Yuan, Y. Yuan, Y. J. Yuan, Z. Y. Yuan, C. X. Yue, A. A. Zafar, F. R. Zeng, S. H. Zeng, X. Zeng, Y. Zeng, Y. J. Zeng, X. Y. Zhai, Y. C. Zhai, Y. H. Zhan, A. Q. Zhang, B. L. Zhang, B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang, H. C. Zhang, H. H. Zhang, H. Q. Zhang, H. R. Zhang, H. Y. Zhang, J. Zhang, J. J. Zhang, J. L. Zhang, J. Q. Zhang, J. S. Zhang, J. W. Zhang, J. X. Zhang, J. Y. Zhang, J. Z. Zhang, Jianyu Zhang, L. M. Zhang, Lei Zhang, P. Zhang, Q. Y. Zhang, R. Y. Zhang, Shuihan Zhang, Shulei Zhang, X. D. Zhang, X. M. Zhang, X. Y. Zhang, Y. Zhang, Y. T. Zhang, Y. H. Zhang, Y. M. Zhang, Yan Zhang, Yao Zhang, Z. D. Zhang, Z. H. Zhang, Z. L. Zhang, Z. Y. Zhang, Z. Z. Zhang, G. Zhao, J. Y. Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, N. Zhao, R. P. Zhao, S. J. Zhao, Y. B. Zhao, Y. X. Zhao, Z. G. Zhao, A. Zhemchugov, B. Zheng, B. M. Zheng, J. P. Zheng, W. J. Zheng, Y. H. Zheng, B. Zhong, X. Zhong, H. Zhou, J. Y. Zhou, L. P. Zhou, S. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Y. Z. Zhou, J. Zhu, K. Zhu, K. J. Zhu, K. S. Zhu, L. Zhu, L. X. Zhu, S. H. Zhu, S. Q. Zhu, T. J. Zhu, W. D. Zhu, Y. C. Zhu, Z. A. Zhu, J. H. Zou, and J. Zu

Subjects
Branching fraction, Charm Physics, CP Violation, e +-e − Experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Using e + e − collision data collected at the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, corresponding to an integrated luminosity of 7.33 fb −1, we determine the absolute branching fractions of fifteen hadronic D s + $$ {D}_s^{+} $$ decays with a double-tag technique. In particular, we make precise measurements of the branching fractions B D s + → K + K − π + = 5.49 ± 0.04 ± 0.07 % $$ \mathcal{B}\left({D}_s^{+}\to {K}^{+}{K}^{-}{\pi}^{+}\right)=\left(5.49\pm 0.04\pm 0.07\right)\% $$ , B D s + → K S 0 K + = 1.50 ± 0.01 ± 0.01 % $$ \mathcal{B}\left({D}_s^{+}\to {K}_S^0{K}^{+}\right)=\left(1.50\pm 0.01\pm 0.01\right)\% $$ and B D s + → K + K − π + π 0 = 5.50 ± 0.05 ± 0.11 % $$ \mathcal{B}\left({D}_s^{+}\to {K}^{+}{K}^{-}{\pi}^{+}{\pi}^0\right)=\left(5.50\pm 0.05\pm 0.11\right)\% $$ , where the first uncertainties are statistical and the second ones are systematic. The CP asymmetries in these decays are also measured and all are found to be compatible with zero.

Published
2024
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2. Measurement of Born cross section of e + e − → Σ + Σ ¯ − $$ {e}^{+}{e}^{-}\to {\Sigma}^{+}{\overline{\Sigma}}^{-} $$ at center-of-mass energies between 3.510 and 4.951 GeV

Author

The BESIII collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, I. Balossino, Y. Ban, H.-R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. Bertani, D. Bettoni, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, J. F. Chang, G. R. Che, G. Chelkov, C. Chen, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. L. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Y. Q. Chen, Z. J. Chen, Z. Y. Chen, S. K. Choi, G. Cibinetto, F. Cossio, J. J. Cui, H. L. Dai, J. P. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, B. Ding, X. X. Ding, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, Z. H. Duan, P. Egorov, Y. H. Fan, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, Y. Q. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, Y. T. Feng, M. Fritsch, C. D. Fu, J. L. Fu, Y. W. Fu, H. Gao, X. B. Gao, Y. N. Gao, Yang Gao, S. Garbolino, I. Garzia, L. Ge, P. T. Ge, Z. W. Ge, C. Geng, E. M. Gersabeck, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, S. Gramigna, M. Greco, M. H. Gu, Y. T. Gu, C. Y. Guan, Z. L. Guan, A. Q. Guo, L. B. Guo, M. J. Guo, R. P. Guo, Y. P. Guo, A. Guskov, J. Gutierrez, K. L. Han, T. T. Han, X. Q. Hao, F. A. Harris, K. K. He, K. L. He, F. H. Heinsius, C. H. Heinz, Y. K. Heng, C. Herold, T. Holtmann, P. C. Hong, G. Y. Hou, X. T. Hou, Y. R. Hou, Z. L. Hou, B. Y. Hu, H. M. Hu, J. F. Hu, S. L. Hu, T. Hu, Y. Hu, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, T. Hussain, F. Hölzken, N Hüsken, N. in der Wiesche, J. Jackson, S. Janchiv, J. H. Jeong, Q. Ji, Q. P. Ji, W. Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, X. Q. Jia, Z. K. Jia, D. Jiang, H. B. Jiang, P. C. Jiang, S. S. Jiang, T. J. Jiang, X. S. Jiang, Y. Jiang, J. B. Jiao, J. K. Jiao, Z. Jiao, S. Jin, Y. Jin, M. Q. Jing, X. M. Jing, T. Johansson, S. Kabana, N. Kalantar-Nayestanaki, X. L. Kang, X. S. Kang, M. Kavatsyuk, B. C. Ke, V. Khachatryan, A. Khoukaz, R. Kiuchi, O. B. Kolcu, B. Kopf, M. Kuessner, X. Kui, N. Kumar, A. Kupsc, W. Kühn, J. J. Lane, P. Larin, L. Lavezzi, T. T. Lei, Z. H. Lei, M. Lellmann, T. Lenz, C. Li, C. H. Li, Cheng Li, D. M. Li, F. Li, G. Li, H. B. Li, H. J. Li, H. N. Li, Hui Li, J. R. Li, J. S. Li, Ke Li, L. J Li, L. K. Li, Lei Li, M. H. Li, P. R. Li, Q. M. Li, Q. X. Li, R. Li, S. X. Li, T. Li, W. D. Li, W. G. Li, X. Li, X. H. Li, X. L. Li, X. Z. Li, Xiaoyu Li, Y. G. Li, Z. J. Li, Z. X. Li, C. Liang, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, L. Z. Liao, J. Libby, A. Limphirat, C. C. Lin, D. X. Lin, T. Lin, B. J. Liu, B. X. Liu, C. Liu, C. X. Liu, F. H. Liu, Fang Liu, Feng Liu, G. M. Liu, H. Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Liu, L. C. Liu, Lu Liu, M. H. Liu, P. L. Liu, Q. Liu, S. B. Liu, T. Liu, W. K. Liu, W. M. Liu, X. Liu, Y. Liu, Y. B. Liu, Z. A. Liu, Z. D. Liu, Z. Q. Liu, X. C. Lou, F. X. Lu, H. J. Lu, J. G. Lu, X. L. Lu, Y. Lu, Y. P. Lu, Z. H. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, X. R. Lyu, Y. F. Lyu, F. C. Ma, H. Ma, H. L. Ma, J. L. Ma, L. L. Ma, M. M. Ma, Q. M. Ma, R. Q. Ma, X. T. Ma, X. Y. Ma, Y. Ma, Y. M. Ma, F. E. Maas, M. Maggiora, S. Malde, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. G. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, B. Moses, N. Yu. Muchnoi, J. Muskalla, Y. Nefedov, F. Nerling, L. S. Nie, I. B. Nikolaev, Z. Ning, S. Nisar, Q. L. Niu, W. D. Niu, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, P. Patteri, Y. P. Pei, M. Pelizaeus, H. P. Peng, Y. Y. Peng, K. Peters, J. L. Ping, R. G. Ping, S. Plura, V. Prasad, F. Z. Qi, H. Qi, H. R. Qi, M. Qi, T. Y. Qi, S. Qian, W. B. Qian, C. F. Qiao, X. K. Qiao, J. J. Qin, L. Q. Qin, L. Y. Qin, X. S. Qin, Z. H. Qin, J. F. Qiu, Z. H. Qu, C. F. Redmer, K. J. Ren, A. Rivetti, M. Rolo, G. Rong, Ch. Rosner, S. N. Ruan, N. Salone, A. Sarantsev, Y. Schelhaas, K. Schoenning, M. Scodeggio, K. Y. Shan, W. Shan, X. Y. Shan, Z. J Shang, J. F. Shangguan, L. G. Shao, M. Shao, C. P. Shen, H. F. Shen, W. H. Shen, X. Y. Shen, B. A. Shi, H. Shi, H. C. Shi, J. L. Shi, J. Y. Shi, Q. Q. Shi, S. Y. Shi, X. Shi, J. J. Song, T. Z. Song, W. M. Song, Y. J. Song, Y. X. Song, S. Sosio, S. Spataro, F. Stieler, Y. J. Su, G. B. Sun, G. X. Sun, H. Sun, H. K. Sun, J. F. Sun, K. Sun, L. Sun, S. S. Sun, T. Sun, W. Y. Sun, Y. Sun, Y. J. Sun, Y. Z. Sun, Z. Q. Sun, Z. T. Sun, C. J. Tang, G. Y. Tang, J. Tang, Y. A. Tang, L. Y. Tao, Q. T. Tao, M. Tat, J. X. Teng, V. Thoren, W. H. Tian, Y. Tian, Z. F. Tian, I. Uman, Y. Wan, S. J. Wang, B. Wang, B. L. Wang, Bo Wang, D. Y. Wang, F. Wang, H. J. Wang, J. J. Wang, J. P. Wang, K. Wang, L. L. Wang, M. Wang, Meng Wang, N. Y. Wang, S. Wang, T. Wang, T. J. Wang, W. Wang, W. P. Wang, X. Wang, X. F. Wang, X. J. Wang, X. L. Wang, X. N. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. L. Wang, Y. N. Wang, Y. Q. Wang, Yaqian Wang, Yi Wang, Z. Wang, Z. L. Wang, Z. Y. Wang, Ziyi Wang, D. H. Wei, F. Weidner, S. P. Wen, Y. R. Wen, U. Wiedner, G. Wilkinson, M. Wolke, L. Wollenberg, C. Wu, J. F. Wu, L. H. Wu, L. J. Wu, X. Wu, X. H. Wu, Y. Wu, Y. H. Wu, Y. J. Wu, Z. Wu, L. Xia, X. M. Xian, B. H. Xiang, T. Xiang, D. Xiao, G. Y. Xiao, S. Y. Xiao, Y. L. Xiao, Z. J. Xiao, C. Xie, X. H. Xie, Y. Xie, Y. G. Xie, Y. H. Xie, Z. P. Xie, T. Y. Xing, C. F. Xu, C. J. Xu, G. F. Xu, H. Y. Xu, M. Xu, Q. J. Xu, Q. N. Xu, W. Xu, W. L. Xu, X. P. Xu, Y. C. Xu, Z. P. Xu, Z. S. Xu, F. Yan, L. Yan, W. B. Yan, W. C. Yan, X. Q. Yan, H. J. Yang, H. L. Yang, H. X. Yang, Tao Yang, Y. Yang, Y. F. Yang, Y. X. Yang, Yifan Yang, Z. W. Yang, Z. P. Yao, M. Ye, M. H. Ye, J. H. Yin, Z. Y. You, B. X. Yu, C. X. Yu, G. Yu, J. S. Yu, T. Yu, X. D. Yu, Y. C. Yu, C. Z. Yuan, J. Yuan, L. Yuan, S. C. Yuan, Y. Yuan, Y. J. Yuan, Z. Y. Yuan, C. X. Yue, A. A. Zafar, F. R. Zeng, S. H. Zeng, X. Zeng, Y. Zeng, Y. J. Zeng, X. Y. Zhai, Y. C. Zhai, Y. H. Zhan, A. Q. Zhang, B. L. Zhang, B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang, H. C. Zhang, H. H. Zhang, H. Q. Zhang, H. R. Zhang, H. Y. Zhang, J. Zhang, J. J. Zhang, J. L. Zhang, J. Q. Zhang, J. S. Zhang, J. W. Zhang, J. X. Zhang, J. Y. Zhang, J. Z. Zhang, Jianyu Zhang, L. M. Zhang, Lei Zhang, P. Zhang, Q. Y. Zhang, R. Y. Zhang, Shuihan Zhang, Shulei Zhang, X. D. Zhang, X. M. Zhang, X. Y. Zhang, Y. Zhang, Y. T. Zhang, Y. H. Zhang, Y. M. Zhang, Yan Zhang, Yao Zhang, Z. D. Zhang, Z. H. Zhang, Z. L. Zhang, Z. Y. Zhang, Z. Z. Zhang, G. Zhao, J. Y. Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, N. Zhao, R. P. Zhao, S. J. Zhao, Y. B. Zhao, Y. X. Zhao, Z. G. Zhao, A. Zhemchugov, B. Zheng, B. M. Zheng, J. P. Zheng, W. J. Zheng, Y. H. Zheng, B. Zhong, X. Zhong, H. Zhou, J. Y. Zhou, L. P. Zhou, S. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Y. Z. Zhou, J. Zhu, K. Zhu, K. J. Zhu, K. S. Zhu, L. Zhu, L. X. Zhu, S. H. Zhu, S. Q. Zhu, T. J. Zhu, W. D. Zhu, Y. C. Zhu, Z. A. Zhu, J. H. Zou, and J. Zu

Subjects
e +-e − Experiments, QCD, Branching fraction, Electroweak Interaction, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Using 24.1 fb −1 of e + e − collision data collected with the BESIII detector at the BEPCII collider, the Born cross sections and effective form factors of the e + e − → Σ + Σ ¯ − $$ {e}^{+}{e}^{-}\to {\Sigma}^{+}{\overline{\Sigma}}^{-} $$ reaction are measured. The measurements are performed at center-of-mass energies ranging from 3.510 to 4.951 GeV. No significant evidence for the decay of the charmonium(-like) states, ψ(3770), ψ(4040), ψ(4160), Y(4230), Y(4360), ψ(4415), and Y(4660), into a Σ + Σ ¯ − $$ {\Sigma}^{+}{\overline{\Sigma}}^{-} $$ final state is observed. Consequently, upper limits for the products of the branching fractions and the electronic partial widths at the 90% confidence level are reported for these decays.

Published
2024
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3. Observation of ψ(3686) → Ω − K + Ξ ¯ 0 $$ {\varOmega}^{-}{K}^{+}{\overline{\Xi}}^0 $$ + c.c.

Author

The BESIII collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis, X. C. Ai, R. Aliberti, A. Amoroso, Q. An, Y. Bai, O. Bakina, I. Balossino, Y. Ban, H.-R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. Bertani, D. Bettoni, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, J. F. Chang, G. R. Che, G. Chelkov, C. Chen, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. L. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Y. Q. Chen, Z. J. Chen, Z. Y. Chen, S. K. Choi, X. Chu, G. Cibinetto, F. Cossio, J. J. Cui, H. L. Dai, J. P. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, B. Ding, X. X. Ding, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, Y. Y. Duan, Z. H. Duan, P. Egorov, Y. H. Fan, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, Y. Q. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, Y. T. Feng, M. Fritsch, C. D. Fu, J. L. Fu, Y. W. Fu, H. Gao, X. B. Gao, Y. N. Gao, Yang Gao, S. Garbolino, I. Garzia, L. Ge, P. T. Ge, Z. W. Ge, C. Geng, E. M. Gersabeck, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, S. Gramigna, M. Greco, M. H. Gu, Y. T. Gu, C. Y. Guan, Z. L. Guan, A. Q. Guo, L. B. Guo, M. J. Guo, R. P. Guo, Y. P. Guo, A. Guskov, J. Gutierrez, K. L. Han, T. T. Han, X. Q. Hao, F. A. Harris, K. K. He, K. L. He, F. H. Heinsius, C. H. Heinz, Y. K. Heng, C. Herold, T. Holtmann, P. C. Hong, G. Y. Hou, X. T. Hou, Y. R. Hou, Z. L. Hou, B. Y. Hu, H. M. Hu, J. F. Hu, T. Hu, Y. Hu, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, T. Hussain, F. Hölzken, N. Hüsken, N. in der Wiesche, J. Jackson, S. Janchiv, J. H. Jeong, Q. Ji, Q. P. Ji, W. Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, X. Q. Jia, Z. K. Jia, D. Jiang, H. B. Jiang, P. C. Jiang, S. S. Jiang, T. J. Jiang, X. S. Jiang, Y. Jiang, J. B. Jiao, J. K. Jiao, Z. Jiao, S. Jin, Y. Jin, M. Q. Jing, X. M. Jing, T. Johansson, S. Kabana, N. Kalantar-Nayestanaki, X. L. Kang, X. S. Kang, M. Kavatsyuk, B. C. Ke, V. Khachatryan, A. Khoukaz, R. Kiuchi, O. B. Kolcu, B. Kopf, M. Kuessner, X. Kui, N. Kumar, A. Kupsc, W. Kühn, J. J. Lane, P. Larin, L. Lavezzi, T. T. Lei, Z. H. Lei, H. Leithoff, M. Lellmann, T. Lenz, C. Li, C. H. Li, Cheng Li, D. M. Li, F. Li, G. Li, H. Li, H. B. Li, H. J. Li, H. N. Li, Hui Li, J. R. Li, J. S. Li, Ke Li, L. J. Li, L. K. Li, Lei Li, M. H. Li, P. R. Li, Q. M. Li, Q. X. Li, R. Li, S. X. Li, T. Li, W. D. Li, W. G. Li, X. Li, X. H. Li, X. L. Li, X. Z. Li, Xiaoyu Li, Y. G. Li, Z. J. Li, Z. X. Li, C. Liang, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, L. Z. Liao, J. Libby, A. Limphirat, C. C. Lin, D. X. Lin, T. Lin, B. J. Liu, B. X. Liu, C. Liu, C. X. Liu, F. H. Liu, Fang Liu, Feng Liu, G. M. Liu, H. Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Liu, L. C. Liu, Lu Liu, M. H. Liu, P. L. Liu, Q. Liu, S. B. Liu, T. Liu, W. K. Liu, W. M. Liu, X. Liu, Y. Liu, Y. B. Liu, Z. A. Liu, Z. D. Liu, Z. Q. Liu, X. C. Lou, F. X. Lu, H. J. Lu, J. G. Lu, X. L. Lu, Y. Lu, Y. P. Lu, Z. H. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, X. R. Lyu, Y. F. Lyu, F. C. Ma, H. Ma, H. L. Ma, J. L. Ma, L. L. Ma, M. M. Ma, Q. M. Ma, R. Q. Ma, X. T. Ma, X. Y. Ma, Y. Ma, Y. M. Ma, F. E. Maas, M. Maggiora, S. Malde, A. Mangoni, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. G. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, B. Moses, N. Yu. Muchnoi, J. Muskalla, Y. Nefedov, F. Nerling, L. S. Nie, I. B. Nikolaev, Z. Ning, S. Nisar, Q. L. Niu, W. D. Niu, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, P. Patteri, Y. P. Pei, M. Pelizaeus, H. P. Peng, Y. Y. Peng, K. Peters, J. L. Ping, R. G. Ping, S. Plura, V. Prasad, F. Z. Qi, H. Qi, H. R. Qi, M. Qi, T. Y. Qi, S. Qian, W. B. Qian, C. F. Qiao, X. K. Qiao, J. J. Qin, L. Q. Qin, X. S. Qin, Z. H. Qin, J. F. Qiu, Z. H. Qu, C. F. Redmer, K. J. Ren, A. Rivetti, M. Rolo, G. Rong, Ch. Rosner, S. N. Ruan, N. Salone, A. Sarantsev, Y. Schelhaas, K. Schoenning, M. Scodeggio, K. Y. Shan, W. Shan, X. Y. Shan, Z. J. Shang, J. F. Shangguan, L. G. Shao, M. Shao, C. P. Shen, H. F. Shen, W. H. Shen, X. Y. Shen, B. A. Shi, H. C. Shi, J. L. Shi, J. Y. Shi, Q. Q. Shi, S. Y. Shi, X. Shi, J. J. Song, T. Z. Song, W. M. Song, Y. J. Song, Y. X. Song, S. Sosio, S. Spataro, F. Stieler, Y. J. Su, G. B. Sun, G. X. Sun, H. Sun, H. K. Sun, J. F. Sun, K. Sun, L. Sun, S. S. Sun, T. Sun, W. Y. Sun, Y. Sun, Y. J. Sun, Y. Z. Sun, Z. Q. Sun, Z. T. Sun, C. J. Tang, G. Y. Tang, J. Tang, Y. A. Tang, L. Y. Tao, Q. T. Tao, M. Tat, J. X. Teng, V. Thoren, W. H. Tian, Y. Tian, Z. F. Tian, I. Uman, Y. Wan, S. J. Wang, B. Wang, B. L. Wang, Bo Wang, D. Y. Wang, F. Wang, H. J. Wang, J. J. Wang, J. P. Wang, K. Wang, L. L. Wang, M. Wang, Meng Wang, N. Y. Wang, S. Wang, T. Wang, T. J. Wang, W. Wang, W. P. Wang, X. Wang, X. F. Wang, X. J. Wang, X. L. Wang, X. N. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. L. Wang, Y. N. Wang, Y. Q. Wang, Yaqian Wang, Yi Wang, Z. Wang, Z. L. Wang, Z. Y. Wang, Ziyi Wang, D. Wei, D. H. Wei, F. Weidner, S. P. Wen, Y. R. Wen, U. Wiedner, G. Wilkinson, M. Wolke, L. Wollenberg, C. Wu, J. F. Wu, L. H. Wu, L. J. Wu, X. Wu, X. H. Wu, Y. Wu, Y. H. Wu, Y. J. Wu, Z. Wu, L. Xia, X. M. Xian, B. H. Xiang, T. Xiang, D. Xiao, G. Y. Xiao, S. Y. Xiao, Y. L. Xiao, Z. J. Xiao, C. Xie, X. H. Xie, Y. Xie, Y. G. Xie, Y. H. Xie, Z. P. Xie, T. Y. Xing, C. F. Xu, C. J. Xu, G. F. Xu, H. Y. Xu, Q. J. Xu, Q. N. Xu, W. Xu, W. L. Xu, X. P. Xu, Y. C. Xu, Z. P. Xu, Z. S. Xu, F. Yan, L. Yan, W. B. Yan, W. C. Yan, X. Q. Yan, H. J. Yang, H. L. Yang, H. X. Yang, Tao Yang, Y. Yang, Y. F. Yang, Y. X. Yang, Yifan Yang, Z. W. Yang, Z. P. Yao, M. Ye, M. H. Ye, J. H. Yin, Z. Y. You, B. X. Yu, C. X. Yu, G. Yu, J. S. Yu, T. Yu, X. D. Yu, Y. C. Yu, C. Z. Yuan, J. Yuan, L. Yuan, S. C. Yuan, Y. Yuan, Y. J. Yuan, Z. Y. Yuan, C. X. Yue, A. A. Zafar, F. R. Zeng, S. H. Zeng, X. Zeng, Y. Zeng, Y. J. Zeng, X. Y. Zhai, Y. C. Zhai, Y. H. Zhan, A. Q. Zhang, B. L. Zhang, B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang, H. C. Zhang, H. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. Zhang, J. J. Zhang, J. L. Zhang, J. Q. Zhang, J. W. Zhang, J. X. Zhang, J. Y. Zhang, J. Z. Zhang, Jianyu Zhang, L. M. Zhang, Lei Zhang, P. Zhang, R. Y. Zhang, Shuihan Zhang, Shulei Zhang, X. D. Zhang, X. M. Zhang, X. Y. Zhang, Y. Zhang, Y. T. Zhang, Y. H. Zhang, Y. M. Zhang, Yan Zhang, Yao Zhang, Z. D. Zhang, Z. H. Zhang, Z. L. Zhang, Z. Y. Zhang, Z. Z. Zhang, G. Zhao, J. Y. Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, N. Zhao, R. P. Zhao, S. J. Zhao, Y. B. Zhao, Y. X. Zhao, Z. G. Zhao, A. Zhemchugov, B. Zheng, J. P. Zheng, W. J. Zheng, Y. H. Zheng, B. Zhong, X. Zhong, H. Zhou, J. Y. Zhou, L. P. Zhou, S. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Y. Z. Zhou, J. Zhu, K. Zhu, K. J. Zhu, L. Zhu, L. X. Zhu, S. H. Zhu, S. Q. Zhu, T. J. Zhu, W. D. Zhu, W. J. Zhu, Y. C. Zhu, Z. A. Zhu, J. H. Zou, and J. Zu

Subjects
Branching fraction, e +-e − Experiments, QCD, Quarkonium, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Using (27.12 ± 0.14) × 108 ψ(3686) events collected with the BESIII detector at BEPCII, the decay of ψ(3686) → Ω − K + Ξ ¯ 0 $$ {\varOmega}^{-}{K}^{+}{\overline{\Xi}}^0 $$ + c.c. is observed for the first time. The branching fraction of this decay is measured to be B ψ 3686 → Ω − K + Ξ ¯ 0 + c . c . $$ {\mathcal{B}}_{\psi (3686)\to {\varOmega}^{-}{K}^{+}{\overline{\Xi}}^0+\textrm{c}.\textrm{c}.} $$ = (2.78 ± 0.40 ± 0.18) × 10 −6, where the first uncertainty is statistical and the second is systematic. Possible baryon excited states are searched for in this decay, but no evident intermediate state is observed with the current sample size.

Published
2024
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4. Production of intense pulsed beams of highly charged ions from a superconducting electron cyclotron resonance ion source

Author

L. X. Li, J. B. Li, J. D. Ma, H. Guo, B. Guo, D. Hitz, Y. C. Feng, W. Lu, J. W. Guo, X. Fang, R. N. Jin, Y. J. Yuan, L. T. Sun, and H. W. Zhao

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

An experimental study of the afterglow mode was performed with a third generation electron cyclotron resonance ion source, SECRAL-II (Superconducting ECR ion source with Advanced design in Lanzhou No. II), under double frequency heating. The experimental results show that intense pulsed beams of highly charged ions (e.g., 266 eμA of ^{129}Xe^{34+} and 169 eμA of ^{129}Xe^{38+}) could be produced at high frequency (24+18 GHz) and high power (∼8 kW), even compared with the beam intensity records of SECRAL-II obtained in continuous wave (cw) mode at higher microwave frequency (28+18 GHz) and higher power (∼10 kW), the gain factor is also up to ∼3. Meanwhile, it is found that the afterglow decay time in our study is much longer than that obtained with the second generation ECR ion sources typically operating at 10–18 GHz, and the corresponding peak duration is greater than 2 ms. This study provides a viable solution for heavy ion synchrotron accelerator complex such as High Intensity Heavy Ion Accelerator Facility project that requires intense pulsed beams of highly charged ions with long peak duration.

Published
2022
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5. Rapid host strain improvement by in vivo rearrangement of a synthetic yeast chromosome

Author

B. A. Blount, G-O. F. Gowers, J. C. H. Ho, R. Ledesma-Amaro, D. Jovicevic, R. M. McKiernan, Z. X. Xie, B. Z. Li, Y. J. Yuan, and T. Ellis

Subjects
Science
Abstract

The Sc2.0 project has built the Synthetic Chromosome Rearrangement and Modification by LoxP-mediated Evolution (SCRaMbLE) system into their synthetic chromosomes. Here the authors use SCRaMbLE to rapidly develop, diversify and screen strains for diverse production and growth characteristics.

Published
2018
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6. In-ring velocity measurement for isochronous mass spectrometry

Author

X. Zhou, M. Zhang, M. Wang, Y. H. Zhang, Y. J. Yuan, X. L. Yan, X. H. Zhou, H. S. Xu, X. C. Chen, Y. M. Xing, R. J. Chen, X. Xu, P. Shuai, C. Y. Fu, Q. Zeng, M. Z. Sun, H. F. Li, Q. Wang, T. Bao, M. Si, H. Y. Deng, M. Z. Liu, T. Liao, J. Y. Shi, Y. N. Song, J. C. Yang, W. W. Ge, Yu. A. Litvinov, S. A. Litvinov, R. S. Sidhu, T. Yamaguchi, S. Omika, K. Wakayama, S. Suzuki, and T. Moriguchi

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Isochronous mass spectrometry based on heavy-ion storage rings is a powerful tool for direct mass measurements of very short-lived nuclei. Owing to the nature of in-flight separation of high-energy reaction products, many ion species with different mass-to-charge ratios (m/q) can be transmitted to and stored in the ring in one shot. However, high mass resolving power can be achieved only for a limited range of ion species with velocities well matching the isochronous condition of the ring. The knowledge of velocities of each stored ions is required to overcome this restriction. For this purpose, two time-of-flight (TOF) detectors were installed 18 m apart in one straight section of the cooler-storage ring CSRe in Lanzhou. The time sequences measured by the two TOF detectors for each stored ion were used for the precision determination of its velocity. A relative precision of the velocity is achieved to the level of 10^{-5} for individual ions. The betatron oscillations of the ion motion in the ring were clearly identified in the data and were taken into account in the analysis. The presented technique can be used for measurements of machine tunes and their dependence on particle momenta.

Published
2021
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7. Mass Measurement of Upper fp -Shell N=Z−2 and N=Z−1 Nuclei and the Importance of Three-Nucleon Force along the N=Z Line

Author

M. Wang, Y. H. Zhang, X. Zhou, X. H. Zhou, H. S. Xu, M. L. Liu, J. G. Li, Y. F. Niu, W. J. Huang, Q. Yuan, S. Zhang, F. R. Xu, Yu. A. Litvinov, K. Blaum, Z. Meisel, R. F. Casten, R. B. Cakirli, R. J. Chen, H. Y. Deng, C. Y. Fu, W. W. Ge, H. F. Li, T. Liao, S. A. Litvinov, P. Shuai, J. Y. Shi, Y. N. Song, M. Z. Sun, Q. Wang, Y. M. Xing, X. Xu, X. L. Yan, J. C. Yang, Y. J. Yuan, Q. Zeng, and M. Zhang

Subjects
General Physics and Astronomy
Published
2023
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8. Mass measurements show slowdown of rapid proton capture process at waiting-point nucleus 64Ge

Author

X. Zhou, M. Wang, Y. H. Zhang, Yu. A. Litvinov, Z. Meisel, K. Blaum, X. H. Zhou, S. Q. Hou, K. A. Li, H. S. Xu, R. J. Chen, H. Y. Deng, C. Y. Fu, W. W. Ge, J. J. He, W. J. Huang, H. Y. Jiao, H. F. Li, J. G. Li, T. Liao, S. A. Litvinov, M. L. Liu, Y. F. Niu, P. Shuai, J. Y. Shi, Y. N. Song, M. Z. Sun, Q. Wang, Y. M. Xing, X. Xu, F. R. Xu, X. L. Yan, J. C. Yang, Y. Yu, Q. Yuan, Y. J. Yuan, Q. Zeng, M. Zhang, and S. Zhang

Subjects
General Physics and Astronomy, Präzisionsexperimente - Abteilung Blaum
Abstract

X-ray bursts are among the brightest stellar objects frequently observed in the sky by space-based telescopes. A type-I X-ray burst is understood as a violent thermonuclear explosion on the surface of a neutron star, accreting matter from a companion star in a binary system. The bursts are powered by a nuclear reaction sequence known as the rapid proton capture process (rp process), which involves hundreds of exotic neutron-deficient nuclides. At so-called waiting-point nuclides, the process stalls until a slower β+ decay enables a bypass. One of the handful of rp process waiting-point nuclides is 64Ge, which plays a decisive role in matter flow and therefore the produced X-ray flux. Here we report precision measurements of the masses of 63Ge, 64,65As and 66,67Se—the relevant nuclear masses around the waiting-point 64Ge—and use them as inputs for X-ray burst model calculations. We obtain the X-ray burst light curve to constrain the neutron-star compactness, and suggest that the distance to the X-ray burster GS 1826–24 needs to be increased by about 6.5% to match astronomical observations. The nucleosynthesis results affect the thermal structure of accreting neutron stars, which will subsequently modify the calculations of associated observables.

Published
2023
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11. $B\rho$-defined isochronous mass spectrometry: a new approach for high-precision mass measurements of short-lived nuclei

Author

M. Wang, M. Zhang, X. Zhou, Y. H. Zhang, Yu. A. Litvinov, H. S. Xu, R. J. Chen, H. Y. Deng, C. Y. Fu, W. W. Ge, H. F. Li, T. Liao, S. A. Litvinov, P. Shuai, J. Y. Shi, M. Si, R. S. Sidhu, Y. N. Song, M. Z. Sun, S. Suzuki, Q. Wang, Y. M. Xing, X. Xu, T. Yamaguchi, X. L. Yan, J. C. Yang, Y. J. Yuan, Q. Zeng, and X. H. Zhou

Subjects
Physics - Instrumentation and Detectors, nucl-ex, physics.ins-det, Nuclear Experiment
Abstract

A novel technique for broadband high-precision mass measurements of short-lived exotic nuclides is reported. It is based on the isochronous mass spectrometry (IMS) and realizes simultaneous determinations of revolution time and velocity of short-lived stored ions at the cooler storage ring CSRe in Lanzhou. The new technique, named as the $B\rho$-defined IMS or $B\rho$-IMS, boosts the efficiency, sensitivity, and accuracy of mass measurements, and is applied here to measure masses of neutron-deficient $fp$-shell nuclides. In a single accelerator setting, masses of $^{46}$Cr, $^{50}$Fe and $^{54}$Ni are determined with relative uncertainties of (5~-~6)$\times10^{-8}$, thereby improving the input data for testing the unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix. This is the technique of choice for future high-precision measurements of the most rarely produced shortest-lived nuclides., Comment: 8 pages, 4 figures

Published
2022
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13. Heavy ion accelerator facility front end design and commissioning

Author

Y. Yang, L. T. Sun, Y. H. Zhai, Y. J. Zhai, Z. Shen, C. Qian, W. P. Dou, W. Ma, L. Lu, Y. H. Guo, X. Fang, Y. J. Yuan, L. P. Sun, J. C. Yang, and H. W. Zhao

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

A new project, high intensity heavy ion accelerator facility (HIAF), is currently under design and construction in China. The HIAF front end, composed of electron cyclotron resonance (ECR) ion sources, low energy beam transport (LEBT) and radio frequency quadrupole (RFQ), will produce and provide beams of ions with a mass up to uranium at a beam energy of 0.5 MeV/u. The typical beam intensity is designed up to 2 emA for the uranium beam with a charge state of 35+. This paper presents an overall design of the front end for HIAF and discusses several key issues in the design. By modeling the beam extraction from the ECR source, we got a reliable starting beam condition to perform the design. Transverse coupling of the beam from the source was elaborated. To relieve the coupling we implanted two solenoids after the source. Space charge effect in the charge state selection of the ion source was evaluated. An overall space charge compensation degree of no less than 70% was predicted. A beam dynamics simulation was performed by using the initial particle distribution obtained from the extraction modeling. The simulation resulted in development of a beam collimation system in the LEBT to confine the transverse emittance. The RFQ design will follow the development of LEAF-RFQ at Institute of Modern Physics, which has successfully commissioned with several beams and demonstrated as an excellent design. Recent beam commissioning results of LEAF-RFQ will also be presented in this paper.

Published
2019
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14. Analysis of the characteristics of the insulation shear belt and the cause of its formation during the failure of the degenerator

Author

Z W Zhang, X J Zhang, F Wang, S F Liu, Y J Yuan, W Y Geng, and Y Zhang

Subjects
History, Computer Science Applications, Education
Abstract

This paper studies the characteristics of the insulation shear belt produced by the fracture of the vents of the gunhead desceptor and the reasons for its formation when the shell is fired. The results show that: During the explosion, the rupture of the degenerator belongs to the ligament fracture, and the insulation shear belt produced at the time of the break plays the role of “prefabricated crack”. The smaller the microstructure and grain of alloy steel, the easier it is to promote the production of insulation shear belt.

Published
2023
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16. Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

Author

X. J. Yin, Y. J. Yuan, J. W. Xia, Y. He, H. W. Zhao, X. H. Zhang, H. Du, Z. S. Li, X. N. Li, P. Y. Jiang, Y. Q. Yang, L. Z. Ma, J. X. Wu, Z. Xu, L. T. Sun, W. Zhang, X. Z. Zhang, J. Meng, Z. Z. Zhou, Q. G. Yao, G. Z. Cai, W. Lu, H. N. Wang, W. J. Chen, Y. Zhang, X. W. Xu, W. J. Xie, Y. R. Lu, K. Zhu, G. Liu, X. Q. Yan, S. L. Gao, Z. Wang, and J. E. Chen

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

A new heavy-ion linac within a continuous-wave (CW) 4-rod radio-frequency quadrupole (RFQ) was designed and constructed as the injector for the separated-sector cyclotron (SSC) at the Heavy Ion Research Facility at Lanzhou (HIRFL). In this paper, we present the development of and the beam commissioning results for the 53.667 MHz CW RFQ. In the beam dynamics design, the transverse phase advance at zero current, σ_{0⊥}, is maintained at a relatively high level compared with the longitudinal phase advance (σ_{0∥}) to avoid parametric resonance. A quasi-equipartitioning design strategy was applied to control the emittance growth and beam loss. The installation error of the electrodes was checked using a FARO 3D measurement arm during the manufacturing procedure. This method represents a new approach to measuring the position shifts of electrodes in a laboratory environment and provides information regarding the manufacturing quality. The experimental results of rf measurements exhibited general agreement with the simulation results obtained using CST code. During on-line beam testing of the RFQ, two kinds of ion beams (^{40}Ar^{8+} and ^{16}O^{5+}) were transported and accelerated to 142.8 keV/u, respectively. These results demonstrate that the SSC-Linac has made a significant progress. And the design scheme and technology experiences developed in this work can be applied to other future CW RFQs.

Published
2016
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17. Masses of ground and isomeric states of In 101 and configuration-dependent shell evolution in odd- A indium isotopes

Author

X. Xu, J. H. Liu, C. X. Yuan, Y. M. Xing, M. Wang, Y. H. Zhang, X. H. Zhou, Yu. A. Litvinov, K. Blaum, R. J. Chen, X. C. Chen, C. Y. Fu, B. S. Gao, J. J. He, S. Kubono, Y. H. Lam, H. F. Li, M. L. Liu, X. W. Ma, P. Shuai, M. Si, M. Z. Sun, X. L. Tu, Q. Wang, H. S. Xu, X. L. Yan, J. C. Yang, Y. J. Yuan, Q. Zeng, P. Zhang, X. Zhou, W. L. Zhan, S. Litvinov, G. Audi, S. Naimi, T. Uesaka, Y. Yamaguchi

Published
2019
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18. Nd

Author

M Y, Ding, J J, Hou, Y J, Yuan, W F, Bai, C H, Lu, J H, Xi, Z G, Ji, and D Q, Chen

Abstract

Lanthanide-doped upconversion nanomaterials (UCNMs) have promoted extensive interest for its biological research and biomedical applications, benefiting from low autofluorescence background, deep light penetration depth, and minimal photo-damage to biological tissues. However, owing to the 980 nm laser-induced overheating issue and the attenuation effect associated with conventional multi-peak emissions, the usage of UCNMs as fluorescent bioprobes is still limited. To address these issues, an effective strategy has been proposed to tune both the excitation and emission peaks of UCNMs into the first biological window (650 ∼ 900 nm), where the light absorption by water and hemoglobin in biological tissues is minimal. Based on the Nd

Published
2018

19. PRECIPITATION–TEMPERATURE INTERACTIONS IN THE WEST ALTAY MOUNTAINS INFERRED FROM TREE RINGS OF SIBERIAN LARCH

Author

Feng Chen, W-S. Wei, Y-J. Yuan, Huiqin Wang, Li Qin, H-M. Shang, T-W. Zhang, S-L. Yu, R-B. Zhang, and Z-A. Fan

Subjects
biology, Ecology, Central asia, Taiga, Forestry, Plant Science, biology.organism_classification, Larix sibirica, Physical geography, Precipitation, Larch, Climate extremes, Historical record, Chronology
Abstract

Siberian larch (Larix sibirica) trees were studied in a drought-stressed, lowe-levation Taiga forest in the Altay Mountains for their potential to be used for reconstructing precipitation. A climate/growth analysis provided evidence that the tree-ring widths were strongly determined by the climatic conditions from May to July, positively by precipitation and negatively by temperature. Nevertheless, the resulting regional tree-ring chronology of Siberian larch offers only a limited possibility to perform reliable reconstructions of precipitation as only 30.8% of the total variation of the actual April–July precipitation was explainable. Drought events reflected by the chronology were compared with historical records and other tree-ring derived climate reconstructions, showing some common events of climate extremes over much of Central Asia. This new Siberian larch chronology and an earlier maximum latewood density (MXD) chronology from the neighboring region reveal that the local climate is mainly characterized by cold/wet and warm/dry situations over the past 251 years. This study demonstrates that the use of both tree-ring width and MXD data may increase information of past climate variability in the Altay mountain region.

Published
2015
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21. Atomic physics research at HIAF and future perspective

Author

Z. K. Huang, X. L. Zhu, S. F. Zhan, H. S. Xu, X. Ma, R. Cheng, X. H. Zhou, L. N. Sheng, W. Q. Wen, H. B. Wang, J. C. Yang, H. W. Zhao, J. W. Xia, L. J. Mao, Y. J. Yuan, D. Y. Yu, G. Q. Xiao, J. Yang, and W. L. Zhan

Subjects
Physics, History, Future perspective, Engineering physics, Computer Science Applications, Education
Abstract

Synopsis A brief introduction to the undergoing HIAF projects in China is given, and the scientific goals as well as the atomic physics programs are discussed. A new science center in the Gulf area near Hongkong will pro-vide unprecedented opportunities for novel scientific researches based on large scale facilities.

Published
2020
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22. Short Communication Polymorphic microsatellite markers in the false kelpfish Sebastiscus marmoratus: isolation, characterization, and cross-species amplification

Author

Z.-M. Zhuang, J B Ye, Shufang Liu, Y.-J. Yuan, Shaoxiong Ding, and H.-B. Liu

Subjects
Genetics, Linkage disequilibrium, education.field_of_study, Population, Locus (genetics), General Medicine, Biology, biology.organism_classification, Genetic marker, Kelpfish, Genetic variation, Microsatellite, Polymorphic Microsatellite Marker, education, Molecular Biology
Abstract

A (GT/CA)13-microsatellite-enriched genomic library of the false kelpfish Sebastiscus marmoratus was constructed, and 20 polymorphic microsatellite loci were isolated and characterized. The polymorphisms were investigated in 48 wild individuals from a single population collected from the northern Yellow Sea. The numbers of alleles per locus varied from 4-22 with an average of 9. The observed and expected heterozygosities of each locus ranged from 0.196-0.958 and from 0.487-0.942, with an average of 0.693 and 0.765, respectively. One locus significantly deviated from Hardy-Weinberg equilibrium, and one pair of loci was in linkage disequilibrium determined by Bonferroni's correction. Cross-species amplification was also conducted in the related species Inimicus japonicus, collected from East China Sea. The result showed that six loci could be amplified from I. japonicus DNAs. These polymorphic markers would be useful for assessment of genetic variation and population structure of scorpionfish.

Published
2014
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23. Short Communication Seventeen polymorphic microsatellite markers developed for the Javelin goby, Synechogobius hasta (Gobiidae)

Author

C.-C. Bai, F.-Q. Dai, H.-B. Liu, Shufang Liu, Y.-J. Yuan, and Z.-M. Zhuang

Subjects
education.field_of_study, Linkage disequilibrium, biology, Population, Goby, Zoology, Hasta, Locus (genetics), General Medicine, biology.organism_classification, Fishery, Genetic structure, Genetics, Polymorphic Microsatellite Marker, Microsatellite, education, Molecular Biology
Abstract

Synechogobius hasta is an important commercial marine fish with distinctive features of rapid growth and short lifespan. We isolated and characterized 17 microsatellite markers for S. hasta using a (GT)(13)-enriched genomic library. Polymorphism was assessed in 48 individuals from a single population collected from the northern coastal waters of the Yellow Sea. The number of alleles per locus ranged from 2 to 23, with a mean of 11.3. The observed and expected heterozygosities ranged from 0.130 to 1.000 and from 0.123 to 0.939, with means of 0.758 and 0.774, respectively. Fourteen of 17 loci conformed to Hardy-Weinberg equilibrium and no significant linkage disequilibrium between locus pairs was detected. These microsatellite markers will be useful for population genetic structure analyses.

Published
2012
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24. Recombinant glycerol dehydratase from Klebsiella pneumonia XJPD-Li: induction optimization, purification and characterization

Author

G. L. Zhang, C. Li, B. Lv, Y. J. Yuan, and X. L. Xu

Subjects
Chromatography, biology, Chemistry, Klebsiella pneumoniae, Glycerol dehydratase, biology.organism_classification, medicine.disease_cause, Applied Microbiology and Biotechnology, Biochemistry, chemistry.chemical_compound, Affinity chromatography, Biosynthesis, Yield (chemistry), Glycerol, medicine, Specific activity, Escherichia coli
Abstract

Glycerol dehydratase (GDHt) is the rate limiting enzyme in the biosynthesis of 1,3-propanediol from glycerol. The optimization of inducting process for recombinant GDHt from Klebsiella pneumoniae XJPD-Li carried out to increase specific activity and ratio of soluble form. The optimum condition was inducing under the isopropyl-beta-D-thiogalactoside concentration of 0.8 mM and the temperature of 20 degrees C for 3 h. Homogeneity of GDHt then was obtained by affinity chromatography, resulted in 2.11-fold purification and an overall yield of 47.5%. The optimum pH and reaction temperature of GDHt were pH 8.0 and 45 degrees C, respectively. The K(m) for glycerol, 1,2-propanediol, 1,2-ethanediol and coenzyme B12 were 0.48, 1.43, 3.07 mM, and 10.03 nM, respectively. The GDHt showed relatively stable even under temperature of 40 degrees C and a bit blunt to oxygen. The thermo-inactivation kinetic models were fit linear under different temperatures.

Published
2011
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25. Simulation study of LEBT for transversely coupled beam from an ECR ion source

Author

H. W. Zhao, Y. Yang, Z. M. Zhang, Y. J. Yuan, W. P. Dou, Liangting Sun, X. Z. Zh, Y. He, and Qinggao Yao

Subjects
010302 applied physics, Physics, Ion beam, 010308 nuclear & particles physics, business.industry, Cyclotron resonance, 01 natural sciences, Ion source, Electron cyclotron resonance, Ion, Optics, Radio-frequency quadrupole, Physics::Plasma Physics, 0103 physical sciences, Physics::Accelerator Physics, Atomic physics, business, Instrumentation, Decoupling (electronics), Beam (structure)
Abstract

A Low-Energy intense-highly charged ion Accelerator Facility (LEAF) program has been launched at Institute of Modern Physics. This accelerator facility consists of a superconducting Electron Cyclotron Resonance (ECR) ion source, a Low Energy Beam Transport (LEBT) system, and a Radio Frequency Quadrupole (RFQ). It is especially of interest for the extracted ion beam from the ECR ion source, which is transversely coupled, and this property will significantly affect the beam transmission in the LEBT line and the matching with the downstream RFQ. In the beam transport design of LEAF, beam decoupling in the LEBT is considered to lower down the projection emittances and the feasibility of the design has been verified by beam simulation with a transversely coupled beam from the ECR ion source.

Published
2016

26. Upscaling the coupled water flow and heat transfer in the subsurface – Comparison between numerical and field data

Author

Yalchin Efendiev, Y. J. Yuan, R. F. Sviercoski, and Binayak P. Mohanty

Subjects
Hydrology, Moisture, Water flow, Vadose zone, Heat transfer, Flow (psychology), Evaporation, Environmental science, Soil science, Precipitation, Physics::Atmospheric and Oceanic Physics, Water vapor, Physics::Geophysics
Abstract

The simultaneous movement of liquid water, water vapor, and heat in the vadose zone plays a critical role in the overall water and energy balance of the near surface environment. Moisture near the soil surface is influenced by evaporation, precipitation, liquid water flow, and water vapor flow, most of which are strongly coupled. The demand for mathematical models that take into account spatial and temporal scales for the shallow soil are now-a-days more imperative given that: (a) the critical role that such processes play in the global water and energy balance; (b) the interplay between spatial and temporal scales in the near surface region is not well understood. The new contributions in this paper are: the coupled model is revisited and some modifications are proposed aiming to represent the surface/subsurface interaction more accurately; the spatial upscaled coupled model is presented. The models are validated by comparing numerical results between the fine-scale and upscaled models and data for both,...

Published
2015
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27. Frontiers of atomic physics with highly charged heavy ions at HIAF

Author

S. F. Zhang, J. C. Yang, L. N. Sheng, X. Cai, X. H. Zhou, H. S. Xu, R. Cheng, Weiqiang Wen, Y. J. Yuan, D. Y. Yu, H. W. Zhao, J. Yang, W. L. Zhan, B. Wu, L. J. Mao, G. Q. Xiao, Z. K. Huang, Xinwen Ma, Xiaolong Zhu, H. B. Wang, and J. W. Xia

Subjects
Nuclear physics, Physics, History, Atomic physics, Computer Science Applications, Education, Ion
Published
2017
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28. Mass Measurements of the Neutron-Deficient 41Ti, 45Cr, 49Fe, and 53Ni Nuclides: First Test of the Isobaric Multiplet Mass Equation in fp-Shell Nuclei

Author

Y H, Zhang, H S, Xu, Yu A, Litvinov, X L, Tu, X L, Yan, S, Typel, K, Blaum, M, Wang, X H, Zhou, Y, Sun, B A, Brown, Y J, Yuan, J W, Xia, J C, Yang, G, Audi, X C, Chen, G B, Jia, Z G, Hu, X W, Ma, R S, Mao, B, Mei, P, Shuai, Z Y, Sun, S T, Wang, G Q, Xiao, X, Xu, T, Yamaguchi, Y, Yamaguchi, Y D, Zang, H W, Zhao, T C, Zhao, W, Zhang, and W L, Zhan

Abstract

Isochronous mass spectrometry has been applied to neutron-deficient 58Ni projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series of short-lived Tz=-3/2 nuclides including 41Ti, 45Cr, 49Fe, and 53Ni have been measured with a precision of 20–40 keV. The new data enable us to test for the first time the isobaric multiplet mass equation (IMME) in fp-shell nuclei. We observe that the IMME is inconsistent with the generally accepted quadratic form for the A=53, T=3/2 quartet. We perform full space shell model calculations and compare them with the new experimental results.

Published
2012

29. Seventeen polymorphic microsatellite markers developed for the Javelin goby, Synechogobius hasta (Gobiidae)

Author

C-C, Bai, S-F, Liu, Z-M, Zhuang, Y-J, Yuan, H-B, Liu, and F-Q, Dai

Subjects
Heterozygote, Polymorphism, Genetic, Animals, Linkage Disequilibrium, Microsatellite Repeats, Perciformes
Abstract

Synechogobius hasta is an important commercial marine fish with distinctive features of rapid growth and short lifespan. We isolated and characterized 17 microsatellite markers for S. hasta using a (GT)(13)-enriched genomic library. Polymorphism was assessed in 48 individuals from a single population collected from the northern coastal waters of the Yellow Sea. The number of alleles per locus ranged from 2 to 23, with a mean of 11.3. The observed and expected heterozygosities ranged from 0.130 to 1.000 and from 0.123 to 0.939, with means of 0.758 and 0.774, respectively. Fourteen of 17 loci conformed to Hardy-Weinberg equilibrium and no significant linkage disequilibrium between locus pairs was detected. These microsatellite markers will be useful for population genetic structure analyses.

Published
2012

30. Preventing oropharyngeal injury during videolaryngoscopy and intubation

Author

Xu Liao, Fu-Shan Xue, Y. Cheng, and Y. J. Yuan

Subjects
medicine.medical_specialty, Anesthesiology and Pain Medicine, Laryngoscopy, business.industry, medicine.medical_treatment, medicine, Pharyngeal Muscles, Intubation, Humans, General Medicine, Intensive care medicine, business
Published
2012

32. Storage ring at HIE-ISOLDE: Technical Design Report

Author

Thierry Stora, Riccardo Raabe, T. Kröll, Manfred Grieser, J. Simpson, Nasser Kalantar-Nayestanaki, Thomas Aumann, A. N. Artemyev, Dirk Schwalm, D. Mücher, X. W. Ma, P. J. Woods, B. P. Kay, Klaus Blaum, E. Wildner, D. G. Jenkins, H. S. Xu, S. Bishop, A. P. Bernardes, D. H. Schneider, Daniel Wolf Savin, Robert E. Grisenti, Thomas Nilsson, Thomas Stöhlker, Alexander Wolf, A. Andreyev, Haik Simon, Michael Lestinsky, Yu. A. Litvinov, M. Pfützner, M. Steck, Marc Huyse, J. Billowes, S. J. Freeman, Alfredo Estrade, Robert Page, J. J. He, Gavin Lotay, A. J. Boston, M. J. G. Borge, M. A. Fraser, S. Hagmann, T. Davinson, P. Reiter, Marialuisa Aliotta, W. N. Catford, C. Kozhuharov, D. Shubina, George Dracoulis, Joakim Cederkäll, Dietrich Bernhardt, Ch. E. Düllmann, P. H. Regan, J. Kurcewicz, Lutz Schweikhard, Jie Meng, S. Trotsenko, Matthew Reed, Ivan Mukha, Kieran Flanagan, A. St. J. Murphy, Ivan Borzov, Danyal Winters, Magdalena Kowalska, C. Brandau, Ying Zhang, Marc Hausmann, Ari Jokinen, Gerda Neyens, Paul Greenlees, D. T. Joss, Kerstin Sonnabend, Matthias Heil, O. Kiselev, R. von Hahn, X. L. Tu, Kai Zuber, Y. Blumenfeld, Richard Catherall, D. Atanasov, Alfred Müller, C. Nociforo, K. Riisager, F. Bosch, Stefan Schippers, Oleg B. Tarasov, L. M. Fraile, Fredrik Wenander, Peter Egelhof, Roland Repnow, Bao-Hua Sun, D. M. Cullen, Iris Dillmann, Y. Kadi, F. Suzaki, C. Scheidenberger, M. S. Sanjari, Björn Jonson, Philip M Walker, Rene Reifarth, A. E. Barzakh, C. Volpe, Y. J. Yuan, M. Pasini, Takayuki Yamaguchi, Hans Geissel, Nikolaos Petridis, D. Voulot, Wilfried Nörtershäuser, M. Marta, E. Siesling, Zs. Podolyák, J. Gerl, Daniel Fischer, D. L. Balabanski, B. Rubio, C. Dimopoulou, Susanne Kreim, J. F. Smith, Roy Crawford Lemmon, P. Van Duppen, Norbert Pietralla, L. Batist, Dietrich Habs, H.-J. Kluge, M. Labiche, Andrey Surzhykov, R. Schuch, Nicolas Winckler, P. A. Butler, and Alexander Yakushev

Subjects
Applied physics, Nuclear engineering, General Physics and Astronomy, Ring (chemistry), CROSS-SECTION MEASUREMENTS, Technical design, Nuclear physics, HIGHLY-CHARGED IONS, ground-state, CORE-COLLAPSE SUPERNOVAE, General Materials Science, Physical and Theoretical Chemistry, BETA-DECAY, Detectors and Experimental Techniques, Nuclear Experiment, cross-section measurements, Physics, core-collapse supernovae, Large Hadron Collider, dielectronic recombination, Spectrometer, radioactive beams, RADIOACTIVE BEAMS, ORBITAL ELECTRON-CAPTURE, frs-esr facility, orbital electron-capture, DIELECTRONIC RECOMBINATION, exotic nuclei, EXOTIC NUCLEI, highly-charged ions, GROUND-STATE, Physics::Accelerator Physics, Beam (structure), Radioactive beam, Storage ring, beta-decay, FRS-ESR FACILITY
Abstract

We propose to install a storage ring at an ISOL-type radioactive beam facility for the first time. Specifically, we intend to setup the heavy-ion, low-energy ring TSR at the HIE-ISOLDE facility in CERN, Geneva. Such a facility will provide a capability for experiments with stored secondary beams that is unique in the world. The envisaged physics programme is rich and varied, spanning from investigations of nuclear ground-state properties and reaction studies of astrophysical relevance, to investigations with highly-charged ions and pure isomeric beams. The TSR might also be employed for removal of isobaric contaminants from stored ion beams and for systematic studies within the neutrino beam programme. In addition to experiments performed using beams recirculating within the ring, cooled beams can also be extracted and exploited by external spectrometers for high-precision measurements. The existing TSR, which is presently in operation at the Max-Planck Institute for Nuclear Physics in Heidelberg, is well-suited and can be employed for this purpose. The physics cases as well as technical details of the existing ring facility and of the beam and infrastructure requirements at HIE-ISOLDE are discussed in the present technical design report. ispartof: European Physical Journal. Special Topics vol:207 issue:1 pages:1-117 status: published

Published
2012

36. Direct mass measurements of short-lived A=2Z-1 nuclides (63)Ge, (65)As, (67)Se, and (71)Kr and their impact on nucleosynthesis in the rp process

Author

X L, Tu, H S, Xu, M, Wang, Y H, Zhang, Yu A, Litvinov, Y, Sun, H, Schatz, X H, Zhou, Y J, Yuan, J W, Xia, G, Audi, K, Blaum, C M, Du, P, Geng, Z G, Hu, W X, Huang, S L, Jin, L X, Liu, Y, Liu, X, Ma, R S, Mao, B, Mei, P, Shuai, Z Y, Sun, H, Suzuki, S W, Tang, J S, Wang, S T, Wang, G Q, Xiao, X, Xu, T, Yamaguchi, Y, Yamaguchi, X L, Yan, J C, Yang, R P, Ye, Y D, Zang, H W, Zhao, T C, Zhao, X Y, Zhang, and W L, Zhan

Abstract

Mass excesses of short-lived A=2Z-1 nuclei (63)Ge, (65)As, (67)Se, and (71)Kr have been directly measured to be -46,921(37), -46,937(85), -46,580(67), and -46,320(141) keV, respectively. The deduced proton separation energy of -90(85) keV for (65)As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of (65)As suggest that the majority of the reaction flow passes through (64)Ge via proton capture, indicating that (64)Ge is not a significant rp-process waiting point.

Published
2011

37. Mass Measurements of Proton-rich Nuclides at the Cooler Storage Ring at IMP

Author

Y. H. Zhang, X. L. Tu, H. S. Xu, M. Wang, Yu. A. Litvinov, Y. Sun, H. Schatz, X. H. Zhou, Y. J. Yuan, J. W. Xia, G. Audi, K. Blaum, C. M. Du, P. Geng, Z. G. Hu, W. X. Huang, S. L. Jin, L. X. Liu, Y. Liu, X. Ma, R. S. Mao, B. Mei, P. Shuai, Z. Y. Sun, H. Suzuki, S. W. Tang, J. S. Wang, S. T. Wang, G. Q. Xiao, X. Xu, T. Yamaguchi, Y. Yamaguchi, X. L. Yan, J. C. Yang, R. P. Ye, Y. D. Zang, H. W. Zhao, T. C. Zhao, X. Y. Zhang, W. L. Zhan, and Bertram Blank

Subjects
Proton, Chemistry, Nuclear Theory, Mass spectrometry, Isotope separation, law.invention, Nuclear physics, Stellar nucleosynthesis, Nucleosynthesis, law, r-process, Nuclide, Atomic physics, Nuclear Experiment, Storage ring
Abstract

Recent results and progress of mass measurements of proton‐rich nuclei using isochronous mass spectrometry (IMS) are reported. The nuclei under investigation were produced via fragmentation of relativistic energy heavy ions of 78Kr and 58Ni. After in‐flight separation by the fragment separator RIBLL‐2, the nuclei were injected and stored in the experimental storage ring CSRe, and their masses were determined from measurements of the revolution times. The impact of these measurements on the stellar nucleosynthesis in the rp‐process is discussed.

Published
2011

38. Sphingosine kinase 1 participates in insulin signalling and regulates glucose metabolism and homeostasis in KK/Ay diabetic mice

Author

J. Yi, Y. J. Yuan, H. Wang, Q. W. Zhang, L. Sh. Wang, J. Mi, Y. Lu, C. T. Wu, J. L. Chen, M. M. Ma, G. G. Wang, H. F. Duan, and J. F. Li

Subjects
medicine.medical_specialty, Endocrinology, Diabetes and Metabolism, medicine.medical_treatment, Mice, Transgenic, Biology, Carbohydrate metabolism, Adenoviridae, Diabetes Mellitus, Experimental, Mice, Internal medicine, Cell Line, Tumor, Internal Medicine, medicine, Animals, Homeostasis, Humans, Insulin, RNA, Small Interfering, Glucose tolerance test, medicine.diagnostic_test, Gene Transfer Techniques, Metabolism, Glucose Tolerance Test, Sphingolipid, Phosphotransferases (Alcohol Group Acceptor), Endocrinology, Glucose, Sphingosine kinase 1, Diabetes Mellitus, Type 2, biology.protein, Signal transduction, Signal Transduction
Abstract

The aim of this study was to determine the potential role of sphingosine kinase 1 (SPHK1), a key sphingolipid metabolic enzyme, in glucose metabolism and homeostasis.SMMC-7721 hepatoma cells and C2C12 myotube cells were used to explore the role of SPHK1 in glucose uptake in vitro. KK/Ay type 2 diabetic mice, which were transfected with adenovirus harbouring the human SPHK1 gene by i.v. injection, were used to investigate the glucose-lowering effects of SPHK1 in vivo.The basal glucose uptake and the insulin-stimulated glucose uptake in both 7721 cells and C2C12 cells were markedly enhanced when SPHK1 was overexpressed by adenovirus-mediated gene transfer, whereas they were substantially reduced when the expression of SPHK1 was inhibited or the activity of SPHK1 was blocked. Insulin could activate SPHK1 of both cell lines in a dose-dependent manner. SPHK1 gene delivery significantly reduced the blood glucose level of KK/Ay diabetic mice, but had no effect on that of normal animals. It also attenuated elevated levels of plasma insulin, NEFA, triacylglycerol, cholesterol and LDL, significantly ameliorated hyperglycaemia-induced injury of liver, heart and kidney, and enhanced phosphorylation of insulin-signalling kinases such as Akt and glycogen synthase kinase 3beta in livers of the diabetic animals.SPHK1 is involved in insulin signalling and plays an important role in the regulation of glucose and fat metabolism; adenovirus-mediated SPHK1 gene transfer might provide a novel strategy in the treatment of type 2 diabetes mellitus.

Published
2006

39. [Testosterone induction of metallothionein in accessory genital organs of male domestic cats]

Author

D C, Liu and Y J, Yuan

Subjects
Male, Dose-Response Relationship, Drug, Urethra, Cats, Prostate, Animals, Metallothionein, Testosterone, Orchiectomy
Abstract

Orchidectomy of cats resulted in a decrease of metallothionein (MT) in the dorsolateral and ventral lobes of the prostate and in the urethral gland to 21.2% (P0.01), 88.4% (P0.05) and 18.5% (P0.01) of those of intact domestic cats respectively. MT content in the dorsolateral lobe and urethral gland was not restored in orchidectomized cats injected with sesame oil. After injection of a single subcutaneous dose of 10 microg/kg bw of testosterone (T) for 3 d in succession, the MT contents in the two glands were restored respectively to 69.3% and 59.4% of the intact cats. With an increase of T dose to 5, 10, 15, 20, 25 microg/kg bw, plasma T and MT contents in the dorsolateral lobe of prostate and urethral gland increased accordingly. Plasma T concentrations were positively correlated with MT contents in the dorsolateral lobe of prostate and urethral glands (P0.01). Thus biosynthesis of MT in the dorsolateral lobe of prostate or in urethral gland could be induced by a stimulatory dose of T of 20 microg/kg bw.

Published
2002

41. New Rebunchers for HIRFL-CSR

Author

Y. Z. Nie, B. Zhang, Z. H. Li, H. H. Li, J. Y. Tang, Y. J. Yuan, X. H. Zhou, Q. W. Zheng, and T. Z. Huang

Subjects
Engineering, business.industry, Cyclotron, Electrical engineering, Injector, Low frequency, law.invention, Capacitor, Amplitude, Optics, Beamline, law, Harmonic, business, Beam (structure)
Abstract

Three almost-identical rebunchers have been designed for HIRFL-CSR. The first one B1 is going to be taken the off-line test and will be installed in place soon. The rebunchers B1 and B2 are in the BL1 beam line from the injector cyclotron SFC to the main cyclotron SSC, together for the longitudinal matching between the two cyclotrons. The rebuncher B3 is in the BL2 beam line from SSC to the main ring CSRm, either working at the stand-alone mode for the beam from SSC or at the combined mode together with B1 for the beam from SFC. They work at different harmonic modes depending on the beam energy to get the best matching effect. The rebunchers of 22∼54 MHz for B1 and B2 and 23.5∼56 MHz for B3 in frequency range and 20∼120 kV in amplitude use two tuning mechanisms, where the two movable capacitors are for low frequency end and the movable short-circuit panel is for high frequency end.

Published
2001
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42. Lattice of the CSR

Author

J. X. Wu, W. Liu, J. W. Xia, L. Z. Mao, X. D. Yang, M. T. Song, Y. He, Y. J. Yuan, W. Z. Zhang, J. C. Yang, and Guoxing Xia

Subjects
Nuclear physics, Mathematics::Commutative Algebra, law, Chemistry, Lattice (order), Cyclotron, Physics::Accelerator Physics, Heavy ion, Atomic physics, Electron cooling, law.invention, Ion
Abstract

CSR, a new Cooler-Storage-Ring project, is the post-acceleration system of the Heavy Ion Research Facility in Lanzhou (HIRFL). It consists of a main ring (CSRm) and an experimental ring (CSRe). From the HIRFL cyclotron system the heavy ions will be accumulated, cooled and accelerated in the CSRm, then extracted fast and injected into the CSRe for many internal-target experiments with electron cooling. The experimental ring (CSRe) will be operated with three lattice modes for different experiments. The details of the lattice for the two rings will be described in this paper.

Published
2001
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43. Matching modes between HIRFL and CSR

Author

J. Y. Tang, Y. J. Yuan, and H. H. Li

Subjects
Matching (statistics), Medium energy, law, Chemistry, Nuclear engineering, Cyclotron, Beam transmission, Injector, Atomic physics, Storage ring, Beam (structure), law.invention
Abstract

National key scientific project “HIRFL-CSR Cooler Storage Ring” makes use of existing HIRFL as its pre-accelerator. In order to take the full capability of HIRFL, we have studied in detailed the matching modes between HIRFL and CSR. It is proposed to use two matching modes: direct matching between SFC (HIRFL injector cyclotron) and CSRm (CSR main ring), three-cascade matching of SFC, SSC (HIRFL main cyclotron) and CSRm. With these combinations, better beam transmission efficiency, better beam utilization efficiency of HIRFL-CSR accelerator complex and better operation efficiency of HIRFL can be obtained. In the first case, SSC can be used simultaneously in other purposes, either to accelerate medium energy heavy ions or to accelerate protons combined with another small cyclotron.

Published
2001
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44. Design of beam injection and extraction for HIRFL-CSR project

Author

Y. J. Yuan, J. Y. Long, J. Y. Tang, M. T. Song, and J. W. Xia

Subjects
Engineering, business.industry, law, Nuclear engineering, Extraction (chemistry), Cyclotron, Stacking, Heavy ion, business, Beam (structure), Simulation, law.invention
Abstract

The new national key project HIRFL-CSR [1–3] is an extending project of present HIRFL (Heavy Ion Research Facility of Lanzhou) project, which consists of two cooler storage rings (CSR). The beam accumulation, injection and extraction of the rings are described in this paper. For the beam accumulation two schemes will be adopted: multiple multiturn injection scheme and RF stacking scheme. Both fast and slow extraction from the rings will be arranged in the same channels. All the above requirements result in complicated ring structures.

Published
2001
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45. [Study on taxol release in the two-liquid-phase cultures of Taxus cuspidata]

Author

Z L, Wu, J S, Di, Y J, Yuan, and Z D, Hu

Subjects
Plants, Medicinal, Paclitaxel, Solvents, Taxus, Antineoplastic Agents, Phytogenic
Abstract

Effects of rare earth compound (ammonium sulphate), organic solvents(oleic acid and dibutylphthalate) and the integrated function of the rare earth compound and organic solvents were studied on taxol release in the Taxus cuspidata suspension cultures. And then effects of different organic solvents(paraffin, organic acid, alcohol and ester), their volumetric fraction and phase toxicity were studied on taxol release in the two-liquid-phase cultures of Taxus cuspidata. The results showed that the addition of the rare earth compound or the organic solvents could strengthen obviously taxol release, especially the organic solvents. But the addition of the rare earth compound could not strengthen further taxol release in the twoliquid-phase cultures of Taxus cuspidata. Therefore the organic solvents were very good permeabilizing reagents, which could enhance obviously secondary metabolite in the twoliquid-phase cultures of plant cells. Release percentage of taxol was increased into more than 75% from 40% of the control.

Published
2000

46. [Cloning of taxadiene synthase cDNA from the cell line of Taxus cuspidata]

Author

G W, Hu, Z, Ma, T Y, Wen, and Y J, Yuan

Subjects
Blotting, Southern, DNA, Complementary, Plants, Medicinal, Base Sequence, Reverse Transcriptase Polymerase Chain Reaction, Molecular Sequence Data, Cloning, Molecular, Isomerases, Cell Line
Abstract

Taxadiene synthase plays an important role in taxol biosynthesis. RT-PCR was used for cloning taxadiene synthase cDNA fragment from the cells of T. cuspidata. The cDNA was cloned into vector pGEM and transformed to E. coli J M109. The cloned cDNA named pCBMZ was further confirmed by Southern blotting assay and was sequenced. The result showed that taxadiene synthase cDNA of Taxus cuspidata was highly homologous with that of Taxus brevifolia.

Published
2000

49. Rigorous description of holograms of particles illuminated by an astigmatic elliptical Gaussian beam

Author

Kuan Fang Ren, S Coëtmellec, Denis Lebrun, and Y J Yuan

Subjects
Physics, Diffraction, History, Opacity, business.industry, Holography, Physics::Optics, Refraction, Computer Science Applications, Education, law.invention, Optics, law, Vector field, business, Refractive index, Digital holography, Gaussian beam
Abstract

The digital holography is a non-intrusive optical metrology and well adapted for the measurement of the size and velocity field of particles in the spray of a fluid. The simplified model of an opaque disk is often used in the treatment of the diagrams and therefore the refraction and the third dimension diffraction of the particle are not taken into account. We present in this paper a rigorous description of the holographic diagrams and evaluate the effects of the refraction and the third dimension diffraction by comparison to the opaque disk model. It is found that the effects are important when the real part of the refractive index is near unity or the imaginary part is non zero but small.

Published
2009
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50. Electron-ion recombination rate coefficients of carbon-like Ar12+.

Author

S Mahmood, Z K Huang, W Q Wen, S X Wang, C Y Chen, N Khan, X Xu, L J Dou, H B Wang, X L. Zhu, D M Zhao, L J Mao, X M Ma, J Li, M T Tang, R S Mao, W Q Yang, D Y Yin, Y J Yuan, and J C Yang

Subjects
ION recombination, RECOMBINATION (Chemistry), DELOCALIZATION energy, ELECTRON-ion collisions, STORAGE rings, TIME management
Abstract

Electron-ion recombination of carbon-like Ar12+ forming Ar11+ has been investigated for the first time by using the cooler storage ring CSRm at the Institute of Modern Physics in Lanzhou, China. The absolute recombination rate coefficients are derived from the measurement in the electron-ion collision energy range of 0–50 eV, covering dielectronic recombination (DR) resonances associated with 2s22p2 and 2s2p3 (Δn = 0) core excitations. Theoretical results are obtained by employing FAC code and compared with the experimental recombination spectrum. An overall agreement is found in resonance energy positions between merged-beam and calculated spectra. Temperature dependent rate coefficients are derived from the measured DR spectrum by convoluting it with a Maxwell–Boltzmann energy distribution and compared with the calculations from the literature. In the presented temperature range 103–107 K, the experimentally derived rate coefficients agree with the theoretical results of Gu (2003 Astrophys. J.590 1131) within the experimental uncertainties. The calculation by Zatsarinny et al (2004 Astron. Astrophys.417 1173) underestimates the rate coefficients in the temperature range 103–5 × 104 K. The combination of the experimental results and theoretical calculation provides a benckmark for Ar12+ recombination data used in astrophysical modeling. [ABSTRACT FROM AUTHOR]

Published
2020
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