Laser-induced annihilation: Relativistic particles from ultra-dense hydrogen H(0)

IF 1.6 3区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS High Energy Density Physics Pub Date : 2021-08-01 DOI:10.1016/j.hedp.2021.100942
Leif Holmlid , Sveinn Olafsson
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引用次数: 7

Abstract

Particle annihilation means that nuclear particles annihilate each other (for example nucleons like a neutron and an anti-neutron) and generate showers of mesons (mainly kaons and pions) at high energy. The kaons decay via pions and muons to electrons, positrons, neutrinos and photons. The energy which can be extracted from the very fast particles is of the order of 50% of the total energy of the nucleon masses involved or 500 MeV per mass unit. Several reports have been published recently on the meson showers ejected by pulsed-laser impact on ultra-dense hydrogen H(0). Since the particle velocities often are relativistic at >100 MeVu−1 it is clear that a much more efficient nuclear process is responsible than in a normal hydrogen isotope fusion process (which can give only 3 and 15 MeV per mass unit out). The first experiment showing heat production above break-even in a laser-induced nuclear process in H(0) was published in AIP Avances as early as 2015. Here, we use a standard method for relativistic particle detection to show that the particles ejected by the laser pulse from D(0) are charged (thus not photons), and in fact positive, and that the signals decay with the characteristic decay times of kaons and pions with uncertainty < 1%. Using the measured kinetic energies of the mesons gives exact energy conservation. We conclude that annihilation of nucleons in H(0) is observed. This may have profound effects on future energy production, since the efficiency of the fuel in annihilation is roughly a factor of 100 higher than in a nuclear fusion process. Ordinary hydrogen (protium and deuterium) can be used as fuel instead of radioactive tritium. This means that energy is generated at low cost and with very little harmful radiation both for terrestrial and space applications (Acta Astronautica 2020).

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激光诱导湮灭:来自超密氢H(0)的相对论粒子
粒子湮灭是指核粒子相互湮灭(例如像中子和反中子这样的核子),并产生大量高能介子(主要是介子和介子)。介子通过介子和介子衰变成电子、正电子、中微子和光子。可以从非常快的粒子中提取的能量约为所涉及的核子质量总能量的50%或每质量单位500兆电子伏特。最近发表了几篇关于脉冲激光撞击超密氢H(0)所发射的介子阵雨的报道。由于粒子速度在100 MeV−1时通常是相对的,因此很明显,一个比正常氢同位素聚变过程(每单位质量只能产生3和15 MeV)更有效的核过程是负责的。早在2015年,第一个显示H(0)激光诱导核过程中产热超过收支平衡的实验就发表在AIP advances上。在这里,我们使用相对论粒子检测的标准方法来证明激光脉冲从D(0)发射的粒子是带电的(因此不是光子),实际上是正的,并且信号随着具有不确定性的介子和介子的特征衰减时间而衰减。1%。利用测量到的介子动能给出了精确的能量守恒。我们得出结论,在H(0)中观察到核子的湮灭。这可能对未来的能源生产产生深远的影响,因为湮灭过程中燃料的效率大约比核聚变过程高100倍。普通的氢(质子和氘)可以代替放射性的氚作为燃料。这意味着能源以低成本产生,并且对地面和空间应用的有害辐射很小(《宇航学报》2020年)。
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来源期刊
High Energy Density Physics
High Energy Density Physics PHYSICS, FLUIDS & PLASMAS-
CiteScore
4.20
自引率
6.20%
发文量
13
审稿时长
6-12 weeks
期刊介绍: High Energy Density Physics is an international journal covering original experimental and related theoretical work studying the physics of matter and radiation under extreme conditions. ''High energy density'' is understood to be an energy density exceeding about 1011 J/m3. The editors and the publisher are committed to provide this fast-growing community with a dedicated high quality channel to distribute their original findings. Papers suitable for publication in this journal cover topics in both the warm and hot dense matter regimes, such as laboratory studies relevant to non-LTE kinetics at extreme conditions, planetary interiors, astrophysical phenomena, inertial fusion and includes studies of, for example, material properties and both stable and unstable hydrodynamics. Developments in associated theoretical areas, for example the modelling of strongly coupled, partially degenerate and relativistic plasmas, are also covered.
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