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Discrimination of Three Nucleon Force Models via Proton-Deuteron Breakup Reactions

通过质子-氘核分裂反应区分三种核子力模型

基本信息

批准号：
16403002
负责人：
YAKO Kentaro
金额：
$ 2.5万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

One current interest for the investigations of few-nucleon system is the study of three-nucleon force (3NF) properties in the three nucleon systems. The 3NF of itself has a long history about 70 years. However, up to now, there has been little knowledge with which to constrain the 3NFs. That is due to the fact that the 3NFs are relatively weak compared to two-nucleon interactions and therefore it is hard to approach and also to find evidences for them experimentally.In order to explore 3NF effects, especially focusing on discrimination of two 3NF models, Tucson-Melbourne and Urbana we measured the vector analyzing powers for proton-deuteron breakup reactions (p+d→p+p+n) at 190 MeV/A at KVI, the Netherlands. For breakup reactions one can measure different kinematical configurations. Choosing a particular configuration one hopes to enhance the 3NF effects which are sensitive to the particular amplitude of 3NF. At KVI we have performed the breakup experiment with the detector BINA which c … More overs almost the whole angular range. We have successfully obtained about 1000 configurations for breakup reactions which cover the proton energies from 30 MeV to 130 MeV and the angular range from 10° to 165°. By direct comparison between the obtained data and rigorous numerical Faddeev calculations we obtained the potential information of 3NF and off the energy shell properties. The data have rather better agreement with the calculations with Urbana 3NF than Tucson-Melbourne 3NF.As a preparation for the breakup measurement at KVI, we performed the experiments on deuteron-proton elastic scattering at Dubna synchrotron facility in Russia where the polarized deuteron beams at the highest energy in the world are available. This experiment has been motivated by the theoretical predictions by our collaborator Prof.H.Witala that one should consider relativistic effects in order to discriminate 3NF models. To obtain the systematic information of relativistic effects quantitatively we measured in a wide incident energy range 135 MeV/A-800 MeV/A. By comparing the obtained data and the theoretical predictions incorporating relativistic effects, we found that the relativistic effects are visible at the very backward angles for elastic deuteron-proton scattering. Less

目前研究少核子系统的一个重要方面是研究三核子系统中的三核子力(3Nf)性质。3NF本身已有70多年的悠久历史。然而，到目前为止，还没有什么知识来约束3NF。这是因为与两核子相互作用相比，3Nf相对较弱，因此很难接近并在实验上找到它们的证据。为了探索3Nf的效应，特别是对图森-墨尔本和Urbana两个3Nf模型的区分，我们在荷兰KVI测量了190 MeV/A下质子-氚裂解反应(p+d→p+p+n)的矢量分析能力。对于分解反应，人们可以测量不同的运动学构型。选择一种特定的构型，人们希望增强对3nF的特定幅度敏感的3nF效应。在KVI，我们用c…的BINA探测器进行了裂解实验几乎在整个角度范围内都有更多的旋转。我们已经成功地获得了质子能量从30 MeV到130 MeV，角范围从10°到165°的大约1000组态的裂解反应。通过将所得数据与严格的Faddeev数值计算进行直接比较，我们得到了3Nf的势能信息和能级壳层性质。作为KVI分裂测量的准备工作，我们在俄罗斯Dubna同步加速器装置上进行了氚-质子弹性散射实验，那里有世界上能量最高的偏振氚束流。本实验的动机是我们的合作者H.Witala教授的理论预测，即为了区分3NF模型，人们应该考虑相对论效应。为了定量地获得相对论效应的系统信息，我们在135 MeV/A-800 MeV/A的宽入射能量范围内进行了测量。通过将所得数据与计入相对论效应的理论预测进行比较，我们发现对于弹性氢-质子散射，相对论效应在非常后的角度是可见的。较少

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Measurement of the tensor analyzing power T_<20> in the dd→^3Hen and dd→^3Hp at intermediate energies and at zero degrees

中等能量和零度下 dd→^3Hen 和 dd→^3Hp 中张量分析能力 T_<20> 的测量

DOI：
发表时间：
2004
期刊：
Physics Letters B 598
影响因子：
0
作者：
V.P.Ladygin;H.Sakai et al.
通讯作者：
H.Sakai et al.

Resolving the Discrepancy of 135 MeV pd Elastic Scattering Cross Sections and Relativistic Effects

解决135 MeV pd弹性散射截面与相对论效应的差异

DOI：
发表时间：
2005
期刊：
Physical Review Letters 95
影响因子：
0
作者：
Machida;M. N.;V.P.Ladygin 他;K.Yako 他;K.Sekiguchi 他
通讯作者：
K.Sekiguchi 他

Polarization transfer measurement for ^1H(d, p)^2H elastic scattering at 135 MeV/nucleon and three-nucleon force effects

135 MeV/核子和三核子力效应下 ^1H(d, p)^2H 弹性散射的偏振传递测量

DOI：
发表时间：
2004
期刊：
Physical Review C 70
影响因子：
0
作者：
K.Sekiguchi;H.Sakai et al.
通讯作者：
H.Sakai et al.

Study of three nucleon force effects in p^+ d breakup With BINA

用 BINA 研究 p^d 破裂中的三种核子力效应

DOI：
发表时间：
期刊：
Nuclear Physics A (印刷中)
影响因子：
0
作者：
V.P.Ladygin;H.Sakai et al.;H.Mardanpoer et al.
通讯作者：
H.Mardanpoer et al.

Study of three-nucleon force effects in p+d break-up with BINA

用 BINA 研究 p d 破裂中的三核力效应

DOI：
发表时间：
期刊：
Nucl.Phys.A. (in print)
影响因子：
0
作者：
H.Mardanpour;H.R.Amir-Ahmadi;R.Benard;A.Biegun;M.Eslami-Kalantari;N.Kalantar-Nayestanaki;M.Kis;St.Kistryn;A.Kozela;H.Kuboki;Y.Maeda;M.Mahjour-Shafiei;J.G.Messchendorp;K.Miki;S.Noji;A.Ramazani;H.Sakai;M.Sasano;K.Sekiguchi;E.Stephan;R.Sw
通讯作者：
R.Sw