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Journal Articles

Proton shell evolution below $$^{132}$$Sn; First measurement of low-lying $$beta$$-emitting isomers in $$^{123,125}$$Ag

Chen, Z. Q.*; Li, Z. H.*; Hua, H.*; Watanabe, Hiroshi*; Yuan, C. X.*; Zhang, S. Q.*; Lorusso, G.*; Orlandi, R.; 60 of others*

Physical Review Letters, 122(21), p.212502_1 - 212502_6, 2019/05

 Times Cited Count:11 Percentile:82.27(Physics, Multidisciplinary)

Journal Articles

In-beam $$gamma$$ spectroscopy of the even-even nucleus $$^{190}$$Pt

Li, G. S.*; Liu, M. L.*; Zhou, X. H.*; Zhang, Y. H.*; Liu, Y. X.*; Zhang, N. T.*; Hua, W.*; Zheng, Y. D.*; Fang, Y. D.*; Guo, S.*; et al.

Physical Review C, 89(5), p.054303_1 - 054303_9, 2014/05

 Times Cited Count:5 Percentile:42.25(Physics, Nuclear)

High-spin states of $$^{190}$$Pt have been reinvestigated using the $$^{176}$$Yb($$^{18}$$O, 4$$n$$) reaction at a beam energy of 88 MeV. The previously known positive parity band associated with the $$nu$$ $$i^{-2}_{13/2}$$ $$nu$$ $$h^{-1}_{9/2}$$ $$nu$$ $$j^{-1}$$ ($$nu j$$ being $$nu p_{3/2}$$ or $$nu f_{5/2}$$) configuration has been revised and extended significantly. A new negative parity band has been established and proposed to be based on the $$nu$$ $$i^{-3}_{13/2}$$ $$nu$$ $$j^{-1}$$ configuration. Possible structure evolution of the yrast line from predominantly vibrational to rotational with increasing spin is discussed with the help of E$$_gamma$$ over spin curves. Additionally, calculations of Total Routhian surfaces have been performed to investigate the band properties.

Journal Articles

Rotational band properties of $$^{173}$$W

Wang, H. X.*; Zhang, Y. H.*; Zhou, X. H.*; Liu, M. L.*; Ding, B.*; Li, G. S.*; Hua, W.*; Zhou, H. B.*; Guo, S.*; Qiang, Y. H.*; et al.

Physical Review C, 86(4), p.044305_1 - 044305_11, 2012/10

AA2012-0752.pdf:0.78MB

 Times Cited Count:5 Percentile:36.05(Physics, Nuclear)

Journal Articles

Signature inversion in the 7/2$$^-$$[503] band of $$^{185}$$Pt

Li, G. S.*; Zhou, X. H.*; Zhang, Y. H.*; Zheng, Y.*; Liu, M. L.*; Hua, W.*; Zhou, H. B.*; Ding, B.*; Wang, H. X.*; Lei, X. G.*; et al.

Journal of Physics G; Nuclear and Particle Physics, 38(9), p.095105_1 - 095105_9, 2011/09

 Times Cited Count:1 Percentile:12.7(Physics, Nuclear)

High-spin states in $$^{185}$$Pt have been investigated by means of in beam $$gamma$$-ray spectroscopic method at the JAEA tandem facility. Low-spin signature inversion is revealed in the 7/2$$^-$$[503] band. The inversion can be interpreted as a configuration change from the 7/2$$^-$$[503] orbital to the 7/2$$^-$$[514] orbital with increasing spin, which is supported by a theoretical calculation of the semi-classical Donau and Frauendorf approach.

Journal Articles

Elongation of plasma channel for electron acceleration

Chen, L.-M.; Nakajima, Kazuhisa; Hong, W.*; Hua, J. F.*; Kameshima, Takashi; Kotaki, Hideyuki; Sugiyama, Kiyohiro*; Wen, X.*; Wu, Y.*; Tang, C.*; et al.

Chinese Optics Letters, 5(S1), p.S133 - S135, 2007/05

Journal Articles

Self-guiding of 100 TW femtosecond laser pulses in centimeter-scale underdense plasma

Chen, L.-M.; Kotaki, Hideyuki; Nakajima, Kazuhisa*; Koga, J. K.; Bulanov, S. V.; Tajima, Toshiki; Gu, Y. Q.*; Peng, H. S.*; Wang, X. X.*; Wen, T. S.*; et al.

Physics of Plasmas, 14(4), p.040703_1 - 040703_4, 2007/04

 Times Cited Count:36 Percentile:78.52(Physics, Fluids & Plasmas)

An experiment for the laser self-guiding studies has been carried out with 100 TW laser pulse interaction with the long underdense plasma. Formation of extremely long plasma channel with its length, about 10 mm, 20 times above the Rayleigh length is observed. The self-focusing channel features such as the laser pulse significant bending and the electron cavity formation are demonstrated experimentally for the first time.

Journal Articles

Internal promoter characterization and expression of the ${it Deinococcus radiodurans pprI}$-${it folP}$ gene cluster

Gao, G.*; Le, D.*; Huang, L.*; Lu, H.*; Narumi, Issei; Hua, Y.*

FEMS Microbiology Letters, 257(2), p.195 - 201, 2006/04

 Times Cited Count:20 Percentile:37.22(Microbiology)

PprI is a general gene switch responsible for the extraordinary radioresistance of ${it Deinococcus radiodurans}$. From NCBI DNA sequence analysis, it was predicted that the translation start codon of the downstream ${it folP}$ gene overlaps the ${it pprI}$ stop codon, suggesting that these genes may form an operon. In this study, we show that a mutant containing an inserted sequence in ${it folP}$ does not grow unless folate is added to the medium, but is not affected in extreme radioresistance, whereasa ${it pprI}$ disruptant strain could grow in absence of folate. We now characterize the promoter of ${it pprI}$ by primer extension experiments. We show that expression of a ${it pprI}$-${it lacZ}$ fusion is constitutive and unaltered following ionizing radiation as is the production of the PprI protein. PprI protein is not expressed if its promoter is deleted and the transcription from the entire ${it pprI}$ promoter (containing a large region upstream of ${it pprI}$ gene) is essential for radioresistance of ${it D. radiodurans}$. However, the deletion of ${it pprI}$ promoter has no effect on the expression of the ${it folP}$-${it lacZ}$ fusion. Primer extension analysis of the ${it folP}$ promoter region shows that ${it folP}$ is transcribed from its own promoter located within the ${it pprI}$ structural gene. All these results do neither support the existence of a ${it pprI}$-${it folP}$ operon nor a regulatory role of FolP in ${it pprI}$ expression.

Oral presentation

Guiding of 100 TW Relativistic Laser Pulses by 10 mm Plasma Channels

Koga, J. K.; Chen, L.-M.; Kotaki, Hideyuki; Nakajima, Kazuhisa; Bulanov, S. V.; Tajima, Toshiki; Gu, Y. Q.*; Peng, H. S.*; Hua, J. F.*; An, W. M.*; et al.

no journal, , 

First experiments for electron acceleration with the laser-gas plasma interaction have been carried out with 30 fs, 100 TW relativistic Ti:Sapphier laser pulse into a long slit (1.2 $$times$$ 10 mm$$^2$$) gas plasma. The 10 mm length plasma channel formed that was longer than 20 times the Rayleigh length. Plasma density was the key factor for this long channel stimulation under 100 TW laser pulse irradiation that was much higher than critical power for relativistic self-focusing. For the first time, channel characteristics such as laser bending, hosing and cavity formation were demonstrated experimentally. In case of long channel guiding, accelerated electron bunch was tightly collimated with low emmitance $$< 0.8 pi$$ mm mrad and quasi-monoenergetic electron bunch ($$sim$$ 70 MeV) was obtained as well. Accelerated electron charge current with electron energy $$>$$ 1 MeV was $$sim$$ 10 nC/shot which was highest value in laser accelerator, to our knowledge, and ascribed to the contribution of long plasma channel. These well controlled laser-driven acceleration is an important cornerstone of relativistic engineering.

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