Scattering of intermediate energy unstable nuclear beam with a solid hydrogen target and measurements of density distribution of Oxygen 20 nucleus

固体氢靶的中能不稳定核束散射及氧20核密度分布测量

• 批准号: 17540252
• 负责人: SAKAGUCHI Harutaka
• 金额: $ 2.3万
• 依托单位: University of Miyazaki (2006)Kyoto University (2005)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17540252/
• 关键词: Unstable nuclear beam; Elastic scattering of unstable nuclei; Solid hydrogen target; 200; 9C nuclei; Density distribution of unstable; Unstable nuclei; Intermediate energy; Oxygen 20; Carbon 9; Solid hydrogen target; 不安定核; 陽子弾性散乱; 中間エネルギー; 原

We have designed and constructed a recoil particle spectrometer for the measurements of elastic and inelastic scattering of the unstable nuclear beam with a solid hydrogen sheet. In the 1st fiscal year we tested our detector system made of momentum tagging counters, beam line drift chambers, beam line scintillation counters for the time of flight measurements, drift chambers for recoil hydrogen and trigger scintillators and NaI(Tl) calorimeters by using the unstable nuclear beam of Oxygen 20. After the test beam time for the use of Oxygen 20, we have decided to use a break up reaction of 22Ne to obtain high intensity 200 beam. By this decision we have obtained more than 10 times beam intensity. In pararell to the beam time at the Heavy Ion Synchrotron HIMAC we have tested the NaI(Tl) calorimeter using the 80 MeV proton beam supplied at Cyclotron RI center of Tohoku University.. Since our calorimeters are made of NaI(Tl) Of 5cm x 5 cm x 45 cm long rod, position dependence of the light o … More utput deteriorates the energy resolution of the calorimeters. Thus we need to know the position dependence of the light output from the scintillators in order to obtain a good energy resolution for the calorimeter.In the 2^<nd> fiscal year we have performed a measurement of the elastic scattering of protons for the unstable nuclear beam of 9C and 20O supplied by the heavy ion synchrotron HIMAC. As for the target we have used solid hydrogen targets of 5mm thickness and 1 mm thickness for 9C and 20O respectively. In August and September we have partially completed the measurements After a half year's data reduction we have succeeded to obtain angular distributions of proton elastic scattering off 9C and 200 for the first time at intermediate energy. The results were reported at the meeting of the physical society of Japan in spring 2007 and will be reported at the international congress of nuclear physics held in Tokyo July 2007. Our data are now theoretically analyzed to deduce the density distribution of the nuclei 220 and 9C. Less

我们设计并建造了一台反冲粒子光谱仪，用于测量带有固体氢片的不稳定核束的弹性和非弹性散射。在第一财年，我们测试了由动量标记计数器、束线漂移室、束流组成的探测器系统。用于飞行时间测量的线闪烁计数器、用于反冲氢的漂移室和触发闪烁体以及使用不稳定的氧 20 核束的 NaI(Tl) 量热计。测试束后对于使用氧气 20 的时间，我们决定使用 22Ne 的分解反应来获得高强度 200 束流，通过这一决定，我们获得了与重离子同步加速器的束流时间平行的 10 倍以上的束流强度。 HIMAC 我们使用东北大学 Cyclotron RI 中心提供的 80 MeV 质子束测试了 NaI(Tl) 量热计。由于我们的量热计是制造的对于 5cm x 5 cm x 45 cm 长的 NaI(Tl) 棒，光输出的位置依赖性会降低热量计的能量分辨率，因此我们需要了解闪烁体光输出的位置依赖性。为热量计获得良好的能量分辨率。在第2财年，我们对9C和20O不稳定核束进行了质子弹性散射测量靶材由重离子同步加速器HIMAC提供，9C和20O分别采用5mm厚和1mm厚的固体氢靶材，经过半年的数据缩减，我们已经部分完成了测量。首次获得中间能量下的 9C 和 200 质子弹性散射角分布。该结果已在 2007 年春季的日本物理学会会议上报告。 2007 年 7 月在东京举行的国际核物理学大会上报告了这一结果。现在对我们的数据进行理论分析，以推断出 220 和 9C Less 原子核的密度分布。

项目成果

原子核の圧縮率と巨大共鳴

核可压缩性和巨共振

• 发表时间: 2006
• 期刊: 日本物理学会誌 61・3
• 作者: 伊藤正俊;内田誠;坂口治隆
• 通讯作者: 坂口治隆

Study of the pionic enhancement in ^<16>O(p,p')^<16>O(O^-,T=1) at 295 MeV

295 MeV ^<16>O(p,p)^<16>O(O^-,T=1) 中π离子增强的研究

• 发表时间: 2006
• 期刊: Physics Letters B 632
• 作者: T.Kawabata;H.Sakaguchi;et al.
• 通讯作者: et al.

Analyzing powers for exclusive 1s1/2 protons knockout from light nuclei

分析轻核独有的 1s1/2 质子敲除能力

• 发表时间: 2005
• 期刊: Physical Review C72・4
• 作者: T.Noro;T.Yonemura;H.Sakaguchi;Y.Yasuda et al.
• 通讯作者: Y.Yasuda et al.

2 α+t cluster states in ^<11>B

^<11>B 中的 2 个 α+t 簇状态

• 发表时间: 2007
• 期刊: Physics Letters B 640
• 作者: T.Kawabata;H.Sakaguchi;et al.
• 通讯作者: et al.