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Title: LABORATORY ROTATIONAL SPECTRUM OF l-C{sub 3}H{sup +} AND CONFIRMATION OF ITS ASTRONOMICAL DETECTION

The rotational spectrum of l-C{sub 3}H{sup +} has been measured in the millimeter-wave band in a 4 K cryogenic ion trap apparatus employing a novel mass-selective action spectroscopy method based on light induced reactions (LIR). Line positions of four rotational transitions (J = 1-2 up to J = 4-5) were observed with a relative precision of 3 × 10{sup –7}. The experimental transition frequencies and derived spectroscopic constants agree with those from recent astronomical observations, and unambiguously confirm the detection of this astrochemically relevant carbocation in the Horsehead photodissociation region and toward Sgr B2(N)
Authors:
; ; ; ;  [1]
  1. I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln (Germany)
Publication Date:
OSTI Identifier:
22363959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 783; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; ACCURACY; DETECTION; DISSOCIATION; MASS SPECTROSCOPY; MOLECULAR IONS; MOLECULES; PHOTOLYSIS; TRAPS; VISIBLE RADIATION