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Effects of Impurities in the Cycle of Muon Catalyzed Nuclear Fusion (muCF)

杂质对 μ 子催化核聚变 (muCF) 循环的影响

基本信息

批准号：
60580180
负责人：
IMANISHI Nobutsugu
金额：
$ 1.15万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60580180/
关键词：
Meson Muon Catalytic Nuclear Fusion Coulomb Capture Transfer Process Mesomolecule エキゾチック粒子

项目摘要

It is well known that a muon stopped in hydrogen catalytically induces nuclear fusion of deutron and triton. However, basic processes included in the fusion cycle are still an open problem. In our program, we studied the Coulomb capture process of exotic particles of muons and pions into molecular and atomic orbitals, and the transfer process of exotic particles X from a neutral <pX^-> to heavier atoms.The experiments were carried out at the 12 GeV proton synchrotron facility in the National Laboratory for High Energy Physics. Capture probabilities of a pion in respective atoms constituting a molecule were measured by detecting pionic x rays with an intrinsic germanium detector for elements with atomic number Z greater than 2. For hydrogen, a gamma-ray pair from a decaying neutral pion produced through the charge exchange reaction between the pion and a proton were detected with large lead glass Cherenkov detectors.A pion is caught into either an atomic orbital or a large mesomolecular orbital. The pion in mesomolecular orbital cascades down to an atomic orbital of constituting atoms through the Auger process. The probabilities of cascade process to the respective atoms depend on net atomic charges on the atoms.In a binary gas mixture, a small neutral particle of <pX^-> formed following the exotic-particle capture in a hydrogen orbital can get into impurity gas and transfer the exotic particle to the atom. It has been found that this transfer process depends strongly on the molecular structure of the impurity gas.

众所周知，停在氢中的μ介子催化地引发了氘和氚的核聚变。然而，聚变循环中的基本过程仍然是一个悬而未决的问题。本项目在高能物理国家实验室12 GeV质子同步加速器上，研究了奇异粒子μ介子和π介子进入分子和原子轨道的库仑俘获过程，以及奇异粒子X从中性<pX^->向重原子的转移过程。通过用本征锗检测器检测原子序数Z大于2的元素的π介子x射线来测量构成分子的各个原子中π介子的捕获概率。对于氢，通过π介子和质子之间的电荷交换反应产生的衰变中性π介子的γ射线对被大型铅玻璃切伦科夫探测器探测到。π介子被捕获到原子轨道或大的中分子轨道。中分子轨道中的π介子通过俄歇过程级联到组成原子的原子轨道。各个原子的级联过程的概率取决于原子上的净原子电荷。在二元气体混合物中，氢轨道中的奇异粒子捕获后形成的<pX^->小中性粒子可以进入杂质气体并将奇异粒子转移到原子中。已经发现，这种转移过程强烈地依赖于杂质气体的分子结构。