Elucidation of the mechanism of deuterium enrichment for ammonia molecule on the interstellar grain surface and use the enrichment fraction for temperature estimation of molecular clouds

• Project/Area Number: 24740362
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geochemistry/Astrochemistry
• Research Institution: Hokkaido University
• Principal Investigator: HIDAKA Hiroshi 北海道大学, 低温科学研究所, 助教 (00400010)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 同位体分別 / 星間塵表面反応 / 星間化学

Research Abstract

ECR (Electron Cyclotron Resonance) nitrogen atomic source using microwave frequency 2.45GHz has been developed for use in the experimental study of the ortho-para ratio and the degree of deuterium enrichment of ammonia molecule which formed on the interstellar grain surface by the atom-atom addition reactions in molecular clouds. Magnetic field configuration for the plasma confinement was designed by 3D magnetostatic analysis, in order to achieve the nitrogen atomic source with the high flux and the high dissociation fraction.

Research Products

• [Journal Article] 星間分子雲での微粒子表面における水素の化学物理過程 (2012)
  • Author(s): 渡部直樹,香内晃,羽馬哲也,日高宏,大場康弘, 千貝健
  • Journal Title: 表面科学 Volume: 33(12) Issue: 12 Pages: 662-668
  • DOI: 10.1380/jsssj.33.662
  • NAID: 130004486722
  • Peer Reviewed
• [Presentation] Tunneling chemical reactions on low-temperature interstellar grain surfaces (2013)
  • Author(s): H. Hidaka
  • Organizer: One-day symposium on E-ring based molecular science
  • Place of Presentation: 首都大学(東京都八王子市)
  • Year and Date: 2013-02-07
  • Invited
• [Presentation] 星間塵表面反応による分子進化 (2013)
  • Author(s): 日高宏
  • Organizer: 新学術領域研究平成25年度研究集会「宇宙における分子進化:星間雲から原子惑星系へ」
  • Place of Presentation: 北海道大学(北海道札幌市)
• [Presentation] 星間塵表面反応による分子進化 (2013)
  • Author(s): 日高宏
  • Organizer: 新学術領域研究平成25年度研究集会｢宇宙における分子進化：星間雲から原始惑星系へ」
  • Place of Presentation: 北海道大学 （北海道札幌市）
• [Presentation] Tunneling chamical reactions on low-temperature interstellar grain surfaces (2013)
  • Author(s): H. Hidaka
  • Organizer: One-day symposium on E-ring based molecular science
  • Place of Presentation: 首都大学 (東京都)
  • Invited
• [Presentation] Formation routes of deuterated formaldehyde and methanol by tunneling reaction on amorphous solid water at 10-20K (2012)
  • Author(s): H. Hidaka,A. Kouchi,N. Watanabe
  • Organizer: 39th COSPER Scientific Assembly(COSPAR2012)
  • Place of Presentation: Narayana Muthy Centre of Excallence(Mysore, India)
  • Invited
• [Presentation] Formation of deuterated formaldehyde on low temperature surface : isotope effect of quantum tunneling reactions (2012)
  • Author(s): H. Hidaka
  • Organizer: International Conference on Chemical Evolution of Star Forming Region and Origin on Life(ASTROCHEM2012)
  • Place of Presentation: S. N. Bose National Centre for Basic Science(Kolkata, India)
  • Invited
• [Presentation] Formation of deuterated formaldehyde on low temperature surface: isotope effect of quantum tunneling reactions (2012)
  • Author(s): H. Hidaka
  • Organizer: International Conference on Chemical Evolution of Star Forming Region and Origin of Life (ASTROCHEM2012)
  • Place of Presentation: S.N. Bose National Centre for Basic Science (Kolkata, India)
  • Invited
• [Presentation] Formation routes of deuterated formaldehyde and methanol by tunneling reaction on amorphous solid water at 10-20K (2012)
  • Author(s): H. Hidaka, A. Kouchi, N. Watanabe
  • Organizer: 39th COSPAR Scientific Assembly (COSPAR2012)
  • Place of Presentation: Narayana Murthy Centre of Excellence (Mysore, India)
  • Invited