Some molecular ions of astrophysical importance: the infrared spectroscopy of H3+ and carbo-cations

Mary-Frances Jagod

doi:10.1117/12.143076

22 April 1993 Some molecular ions of astrophysical importance: the infrared spectroscopy of H3+ and carbo-cations

Mary-Frances Jagod

Proceedings Volume 1858, Laser Techniques for State-Selected and State-to-State Chemistry; (1993) https://doi.org/10.1117/12.143076
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

We continue to perform high resolution infrared spectroscopic studies on the vibration-rotation spectra of small polyatomic cations: H₃⁺, C_mH_n⁺, H_mO_n⁺, and N_mH_n⁺, (m,n >= 1). All these ions have been proposed as having fundamental roles in the chemistry of interstellar molecular gas clouds, the birthplace of stars. In particular, H₃⁺ plays the part of the universal protonator: H₃⁺ + X yields H₂ + HX⁺. The work horse of our high resolution molecular ion spectroscopy has been our difference-frequency laser spectrometer with its tunable infrared source. The molecular ions are made in a Pyrex multiple-inlet-multiple-outlet discharge cell using a gas mixture with a high fraction of He (approximately 95%) and various types of cooling (air, water, and liquid nitrogen). The ion signals are detected by velocity modulation of the plasma with unidirectional multipassing and noise subtraction of the probing infrared radiation. This spectrometer has been used for our studies of the vibration-rotation spectra of H₃⁺ fundamental, overtone and hot bands, and of CH₂⁺, CH₃⁺, C₂H₂⁺ and C₂H₃⁺ fundamental bands. Most recently, we have used a water cooled, Cu hollow cathode discharge to re-examine C₂H₃⁺.

Citation Download Citation

Mary-Frances Jagod "Some molecular ions of astrophysical importance: the infrared spectroscopy of H3+ and carbo-cations", Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); https://doi.org/10.1117/12.143076

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Ions

Infrared radiation

Spectroscopy

Infrared spectroscopy

Jupiter

Plasma

Molecular spectroscopy

Show All Keywords

Keywords/Phrases

Search In:

Publication Years