Research of surface termination mechanism for high density positronium production based on negative electron affinity

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K21882
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 15:Particle-, nuclear-, astro-physics, and related fields
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Tanaka Manobu 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (00222117)
• Co-Investigator(Kenkyū-buntansha): 上殿 明良 筑波大学, 数理物質系, 教授 (20213374)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: ダイヤモンド

Outline of Final Research Achievements

Surface-terminated diamonds has capability of high-density positronium-production target-material as same as aerogels. The production peak at low positron incident energy has benefit from the view point of positron cooling. A model construction is in progress using experimental data and first-principles calculation. We will develop new target which produces dense and low energy positronium for quantum beam science.

Free Research Field

高エネルギー加速器素粒子原子核実験　測定器開発

Academic Significance and Societal Importance of the Research Achievements

低温かつエネルギーのそろったポジトロニウム(Ps)の生成手法を研究開発し、Psのボーズアインシュタイン凝縮(BEC)が実現すれば、BECの研究だけでなく、素粒子原子核分野における反物質を含む系の物理法則の研究や物性物理研究のプローブとして役立つ他、複数の工学応用が考えられる。