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朱敬军 康克军 李元景 李金 J.W.Kwak H.Bhang S.Y.Kim H.S.Lee J.Lee S.S.Myung M.J.Lee S.C.Kim S.K.Kim J.I.Lee Y.D.Kim 《中国物理 C》2005,29(8):721-726
KIMS是寻找和研究暗物质WIMP的实验组. 在WIMP寻找实验中,μ子是十分重要的一种本底. 我们对地下700m深的Yangyang实验室内的μ子通量进行了测量. 介绍了μ子探测器的结构和性能测试. 描述了对μ子入射位置和角度分布的分析,并进行了蒙特卡罗模拟. 实验室内的μ子通量测量值为(7.0±0.4))×10-8/s/cm2/sr. 相似文献
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Y. Satou K. Tshoo H. Bhang S. Choi J. W. Hwang T. Nakamura Y. Kondo Y. Nakayama N. Kobayashi K. N. Tanaka S. Deguchi Y. Kawada N. Tanaka T. Motobayashi H. Sakurai H. Otsu N. Aoi S. Takeuchi K. Yoneda Y. Togano M. Ishihara S. Shimoura T. Kobayashi M. Matsushita T. Honda T. Sumikama Y. Miyashita K. Yoshinaga N. A. Orr F. M. Marques J. Gibelin F. Delaunay D. Sohler T. Zheng Z. H. Li Z. X. Cao 《Few-Body Systems》2013,54(1-4):287-290
The neutron-rich oxygen isotope 23O has been investigated via proton inelastic scattering on a liquid hydrogen target at 63.5 MeV/nucleon. The invariant mass method in inverse kinematics was employed to reconstruct the energy spectrum. A sharp resonance state was observed at 42(5) keV above the neutron threshold. A comparison of the differential cross section leading to this state with a microscopic DWBA calculation allowed a J π assignment of 5/2+ for this state. 相似文献
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H. Bhang S. Ajimura K. Aoki A. Banu T. Fukuda O. Hashimoto J. I. Hwang S. Kameoka B. H. Kang E. Kim J. H. Kim M. Kim T. Maruta Y. Miura Y. Miyake T. Nagae M. Nakamura S. N. Nakamura H. Noumi S. Okada Y. Okayasu H. Outa H. Park P. K. Saha Y. Sato M. Sekimoto T. Takahashi H. Tamura K. Tanida A. Toyoda K. Tshoo K. Tsukada T. Watanabe H. J. Yim 《Few-Body Systems》2013,54(1-4):103-110
The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon–baryon weak interaction in SU3 f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γ n / Γ p value converging to ${\sim 0.5}$ . The large experimental values of Γ n / Γ p of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented. 相似文献
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Clover detector has been used as a Compton polarimeter to measure the linear polarization of γ-rays produced in heavy ion
fusion reaction. The polarization sensitivity of the clover detector has been measured over γ-ray energies ranging from 386
to 1368 ke V. The E1 multipolarity of the 1117 keV transition in 99Rh has been established using this polarimeter. This has resulted in the assignment of negative parity to the band head at
3710 keV in 99Rh. 相似文献
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H. Tamura K. Tanida D. Abe H. Akikawa K. Araki H. Bhang T. Endo Y. Fujii T. Fukuda O. Hashimoto K. Imai H. Hotchi Y. Kakiguchi J. H. Kim Y. D. Kim T. Miyoshi T. Murakami T. Nagae J. Nishida H. Noumi H. Outa K. Ozawa T. Saito J. Sasao Y. Sato S. Satoh R. Sawafta M. Sekimoto T. Takahashi L. Tang H. H. Xia S. H. Zhou L. H. Zhu 《Nuclear Physics A》2000,670(1-4):249-256
We report on the first observation of hypernuclear γ transitions using germanium detectors. Using a large-acceptance Ge detector system, we observed two γ transitions in Λ7Li, the spin-flip
transition at 689±4keV and the
transition at 2050±2 keV (preliminary). The strength of the ΛN spin-spin interaction is derived from the energy of the former transition. As for the latter transition, B(E2) was measured to be 3.9±0.6±0.4 e2fm4 (preliminary), which indicates a shrinkage of the nuclear size of Λ7Li from 6Li and confirms “glue-like role” of Λ. 相似文献
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Background
Delays between actions and their outcomes severely hinder reinforcement learning systems, but little is known of the neural mechanism by which animals overcome this problem and bridge such delays. The nucleus accumbens core (AcbC), part of the ventral striatum, is required for normal preference for a large, delayed reward over a small, immediate reward (self-controlled choice) in rats, but the reason for this is unclear. We investigated the role of the AcbC in learning a free-operant instrumental response using delayed reinforcement, performance of a previously-learned response for delayed reinforcement, and assessment of the relative magnitudes of two different rewards. 相似文献50.
Yang HS Shin J Bhang SH Shin JY Park J Im GI Kim CS Kim BS 《Experimental & molecular medicine》2011,43(11):622-629
Platelet-rich plasma (PRP) contains growth factors that promote tissue regeneration. Previously, we showed that heparin-conjugated fibrin (HCF) exerts the sustained release of growth factors with affinity for heparin. Here, we hypothesize that treatment of skin wound with a mixture of PRP and HCF exerts sustained release of several growth factors contained in PRP and promotes skin wound healing. The release of fibroblast growth factor 2, platelet-derived growth factor-BB, and vascular endothelial growth factor contained in PRP from HCF was sustained for a longer period than those from PRP, calcium-activated PRP (C-PRP), or a mixture of fibrin and PRP (F-PRP). Treatment of full-thickness skin wounds in mice with HCF-PRP resulted in much faster wound closure as well as dermal and epidermal regeneration at day 12 compared to treatment with either C-PRP or F-PRP. Enhanced skin regeneration observed in HCF-PRP group may have been at least partially due to enhanced angiogenesis in the wound beds. Therefore, this method could be useful for skin wound treatment. 相似文献