A study on infrared emission of liquid xenon scintillator

2016 Fiscal Year Final Research Report

• Project/Area Number: 25287055
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Yokohama National University
• Principal Investigator: NAKAMURA Shogo 横浜国立大学, 大学院工学研究院, 准教授 (50212098)
• Co-Investigator(Renkei-kenkyūsha): TAWARA Hiroko 高エネルギー加速器研究機構, 放射線科学センター, 准教授 (30188453) ; HARUYAMA Tomiyoshi 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (90181031)
• Research Collaborator: OHYAMA Shuhei ; YOSHIDA Mao ; HAMANISHI Ryo ; NAGAI Masaya ; GOKUDEN Takashi ; ONO Hayato ; HINO Yota ; TAKEDA Hiroki ; YAGI Daisuke ; NAKAMURA Susumu ; KANOU Yoshiki ; ADACHI Yuya ; MIHARA Satoshi ; KASAMI Katsuyu ; SASAKI Shinichi ; FUJII Keiko ; MURAYAMA Ikuko
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 液体キセノン / シンチレータ / 赤外発光

Outline of Final Research Achievements

Emission spectrum of liquid xenon scintillator was measured in the near-infrared region below 1,700 nm in addition to the vacuum-ultraviolet region. The liquid xenon was excited by gamma-rays from a radioactive source, and the near-infrared scintillation photons coincident with those in the vacuum-ultraviolet region were measured using a photomultiplier and a monochrometer. As a result, the emission reported around 1,300 nm was not observed, but instead significant amount of emission was newly recognized in a wavelength region between 700 and 1,100 nm. The integrated number of photons emitted in the region was about 17±5 % relative to that in the vacuum-ultraviolet region. The near-infrared emission is consistent to be due to some transitions between excited states of atomic xenon.

Free Research Field

宇宙素粒子実験，放射線計測