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6篇 您的检索式:作者名="N.Iwasa"
    题名 作者 年代 出处 被引量
1关键天体反应18Ne(α,p)21Na的实验研究显示文摘在X射线暴高温高密度的环境中,18Ne(α,p)21Na很可能是由热CNO循环突破到rp过程的一个重要反应。到目前为止,人们测得的反应率还存在很大的不确定性。实验中用CRIB(CNS Radioactive Ion Beam separator)提供的21Na放射性束轰击8.8 mg/cm2的聚乙烯厚靶,利用放置在θlab=-14°,0°,14°处的3套硅条探测器望远镜阵列对反冲轻粒子进行鉴别和测量,测得在一段能区(Ex=5.5~9.2MeV)内21Na(p,p)21Na的激发函数。通过对21Na(p,p)共振弹性散射截面进行R矩阵拟合,得到了22Mg共振能级的自旋宇称以及质子宽度等信息,从而为计算18Ne(α,p)21Na反应率提供了实验参数。张立勇 许世伟 何建军 H.Yamaguchi S.Kubono Y.Wakabayashi: 陈思泽 胡钧 马朋 Y.Togano T.Hashimoto D.Kahl T.Teranishil 陈若富 王宏伟 田文栋 郭冰 S.Hayakawa N.Iwasa T.Yamada T.Komatsubara 2013原子核物理评论2013,30,4:1
2Measurement of 2H(12N, 13O)n Angular Distribution and Determination of Astrophysical 12N(p, γ)13O Reaction Rate显示文摘The evolution of massive stars with very low-metallicities depends critically on the amount of CNO nuclides which they produce. The 12N(p, γ)13O reaction is an important branching point in the rap processes, which are believed to be alternative paths to the slow αp process for producing CNO seed nuclei and thus could change the fate of massive stars. In the present work, the angular distribution ofGUO Bing SU Jun LI Zhi-hong WANG You-bao YAN Sheng-quan LI Yun-ju SHU Neng-chuan HAN Yin-lu BAI Xi-xiang CHEN Yong-shou LIU Wei-ping H.Yamaguchi D.N.Binh T.Hashimoto S.Hayakawa D.Kahl S.Kubono HE Jian-jun HU Jun XU Shi-wei N.Iwasa N.Kume LI Zhi-huan 2012Annual Report of China Institute of Atomic Energy2012,,1:0
3Neutron and Alpha Structure in Neutron Deficient Nuclei in Astrophysics显示文摘The paper includes discussions on the important role of neutron and alpha configurations in proton-rich nuclei in nuclear astrophysics in terms of nucleosynthesis under extremely high-temperature hydrogenburning conditions. The νp-process, which is supposed to take place at the very early epoch of type II supernovae, has considerable neutrons and alphas together with protons. The alpha-induced reactions on proton-rich unstable nuclei in the light mass regions is expected to play a crucial role, but very few of them were investigated well yet because of the experimental difficulties. Specifically, I report our recent experimental effort for the breakout process from the pp-chain region,~7Be(α, γ)^(11)C(α,p)^(14)N under the νp-process. The neutron-induced reactions on proton-rich nuclei, which is even more a challenging subject, were investigated previously for very few nuclei. One possible experimental method is the Trojan Horse Method(THM). We successfully have applied THM to the ^(18)F(n,α)^(14)N reaction study with an unstable beam of ^(18)F.S.Kubono 何建军 H.Yamaguchi D.M.Kahl S.Hayakawa T.Teranishi S.Cheribini M.Gulino Y.K.Kwon T.Hashimoto Y.Wakabayashi N.Iwasa S.Kato T.Komatsubara D.N.Binh L.H.Khiem N.N.Duy T.Kawabata C.Spitaleri G.G.Rapisarda M.La Cognata L.Lamia R.G.Pizzone S.Romano A.Coc N.de Sereville F.Hammache G.Kiss S.Bishop 2016原子核物理评论2016,33,2:0
4Precise Determination of ^(40)Ti Mass by Measuring the ^(40)Sc Isospin Analogue State显示文摘The mass of 40 Ti has been determined by using the isobaric multiplet mass equation method. The experimental data of the 40Tiβ-decay were used to determine the level of the isospin analogue state of^( 40)Sc. The ground-state mass excess and the QEc value for 40 Ti were determined to be -9060 ± 12 keV and 11 466 ± 13keV, respectively.柳卫平 M.Hellstrom R.Collatz J.Benlliure L.Chulkov D.Cortina Gil F.Farget H.Grawe Z.Hu N.Iwasa I.Reusen E.Roeckl M.Pfützner A.Piechaczek R.Raabe G.Vancraeynest A.Wohr 2001Chinese Physics Letters2001,18,11:0
52H(12N,13O)n角分布的测量以及12N(p,γ)13O反应率的确定显示文摘正大质量贫金属恒星的演化与其产生的CNO核数目紧密相关,快速αp俘获过程是产生CNO种子核的重要过程之一,它可改变大质量恒星的命运。12N(p,γ)13O反应是快速αp过程中的一个重要分支点。本工作首次测量了Ec.m.=8.4MeV的2H(12N,13O)n质子转移反应角分布。郭冰 苏俊 李志宏 王友宝 颜胜权 李云居 舒能川 韩银录 白希祥 陈永寿 柳卫平 H.Yamaguchi D.N.Binh T.Hashimoto S.Hayakwa D.Kahl S.Kubono 何建军 胡钧 许世伟 N.Iwasa N.Kume 李智焕 2012中国原子能科学研究院年报2012,,1:0
6用逆运动学厚靶方法研究22Na+p共振散射显示文摘正22Na是最重要但又有争议的宇宙γ射线发射体之一,其相对较短的衰变寿命(T1/2=2.6a)及其缓发的1.275MeVγ射线,使其有可能成为太阳系附近ONe新星爆发的灵敏探针。在新星形成过程中随温度提高有两种模式,即20Ne(p,γ)21Na(β+)21Ne(p,γ)2Na或20Ne(p,γ)21Na(p,γ)22Mg(β+)22Na可生成22Na,王友宝 金孙均 苏俊 颜胜权 李云居 郭冰 李志宏 白希祥 柳卫平 H.Yamaguchi S.Kubono D.Kahl J.Hu H.S.Jung J.Y.Moon T.Teranishi H.W.Wang H.Ishiyama N.Iwasa H.Komatsubara 2012中国原子能科学研究院年报2012,,1:0
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