Theoretical Study of antiproton dynamics in support of antihydrogen formation projects

支持反氢形成项目的反质子动力学理论研究

基本信息

  • 批准号:
    15340127
  • 负责人:
  • 金额:
    $ 10.43万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2006
  • 项目状态:
    已结题

项目摘要

In the first three years, we developed a time-dependent wave packet formalism and a semiclassical scattering theory and applied them to the collision processes of hydrogen atoms, hydrogenic ions, negative hydrogen ions, helium atoms and hydrogen molecule ions with an antiproton. Total antiproton-capture cross sections were calculated with satisfactory accuracy but each partial cross section for a transition to a specific protonium state was not obtained by these methods. This is because the number of relevant channels amounts to several tens of thousand and the numerical calculations are impossible owing to the size of programming size and the CPU time. In the third year, Dr. Xiao-Min Tong joined the research group and the collaboration with Toshima lead to a novel scattering theory based on the causality relation of Green's function.. In this approach, only the scattered wave propagating outward is calculated and the boundary condition of the scattering equations is automatically satisfied without the tedious procedure of adjusting the wave functions at the asymptotic region. We succeeded in evaluating each partial cross section with high accuracy by this new method. Besides we have applied it to the negative-muon capture processes and the antiprotonic helium formation.For positronium formation processes, we developed a new approach in which the positronium formation and the pair annihilation in a unified manner introducing a optical potential for the annihilation. We also introduced the time-delay matrix for the analysis of overlapping resonances successfully.
在前三年中,我们发展了含时波包理论和半经典散射理论,并将它们应用于氢原子、类氢离子、负氢离子、氦原子和氢分子离子与反质子的碰撞过程。总的反质子捕获截面计算具有令人满意的精度,但每个部分截面的过渡到一个特定的质子状态,没有得到这些方法。这是因为相关通道的数量达到数万个,并且由于编程大小和CPU时间的大小,不可能进行数值计算。第三年,童晓敏博士加入研究小组,与丰岛合作,提出了基于绿色函数因果关系的新散射理论。在这种方法中,只计算向外传播的散射波,并且散射方程的边界条件自动满足,而无需在渐近区域调整波函数的繁琐过程。我们成功地评估每个部分截面与高精度的这种新方法。此外,我们还将其应用到负μ子俘获过程和反质子氦的形成过程中,对于正电子偶素的形成过程,我们发展了一种新的方法,将正电子偶素的形成和对湮灭统一起来,引入了一个用于湮灭的光学势.我们还成功地引入了用于重叠共振分析的时滞矩阵。

项目成果

期刊论文数量(99)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Carrier-envelope phase dependence of nonsequential double ionization of H2 by few-cycle laser pulses
Anomalous variation of the exciton Fano-resonance spectra in strongly biased Wannier-Stark ladder
强偏置万尼尔-斯塔克梯中激子法诺共振谱的异常变化
Attosecond XUV pulses for complete mapping of the time-dependent wave packet of D_2^+
阿秒 XUV 脉冲用于完整映射 D_2^ 的时间相关波包
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    X.M.Tong;C.D.Lin
  • 通讯作者:
    C.D.Lin
Three-body muon-transfer collisions from hydrogen isotope to He<2+> and Li<3+> ions
从氢同位素到He 2 和Li 3 离子的三体μ子转移碰撞
State-specified protonium formation in low energy antiproton -hydrogen-atom collisions
低能反质子-氢原子碰撞中国家指定的质子形成
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    X.M.Tong;K.Hino;N.Toshima
  • 通讯作者:
    N.Toshima
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TOSHIMA Nobuyuki其他文献

TOSHIMA Nobuyuki的其他文献

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{{ truncateString('TOSHIMA Nobuyuki', 18)}}的其他基金

Novel method for directnumerical solution of scattering equations
散射方程直接数值求解的新方法
  • 批准号:
    21540406
  • 财政年份:
    2009
  • 资助金额:
    $ 10.43万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Theoretical study of antiproton and position collisions related to antimatter physics
反质子及反物质物理相关位置碰撞的理论研究
  • 批准号:
    11640384
  • 财政年份:
    1999
  • 资助金额:
    $ 10.43万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Theoretical study of antiparticle collisions and exotic-atom formation
反粒子碰撞和奇异原子形成的理论研究
  • 批准号:
    07640523
  • 财政年份:
    1995
  • 资助金额:
    $ 10.43万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Theoretical study of electronic transitions in relativistic heavy-ion collisions
相对论性重离子碰撞中电子跃迁的理论研究
  • 批准号:
    02640288
  • 财政年份:
    1990
  • 资助金额:
    $ 10.43万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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激光冷却铍离子用于增强反氢捕获和磁力测定
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