Double resonance measurements of far infrared lasing transitions in methanol

I. Mukhopadhyay; K. V.L.N. Sastry; Richard L. Crownover; Frank C. DeLucia

doi:10.1016/S1350-4495(96)00036-9

Double resonance measurements of far infrared lasing transitions in methanol

I. Mukhopadhyay, K. V.L.N. Sastry, Richard L. Crownover, Frank C. DeLucia

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

In this work, precise frequencies have been measured for two important far-infrared (FIR) laser transitions in methanol. These are optically pumped by the 9P(16) CO₂ laser line at an offset of +64 MHz from the line center, using infrared (IR)-millimetrewave (MMW) double resonance (DR) techniques. The two measured FIR lines are at 525,427.902 and 477,790.879 MHz, with an estimated precision of ± 50 kHz. Another line has been observed at 573,025.151 MHz. It corresponds to an absorption transition whose lower level is the upper pumped level. The measurements provide a valuable confirmation of the assignments of the IR as well as the FIR transitions. In addition, accurate frequencies for several transitions have been determined in the ground vibrational state in the range 109-127 GHz and provide assignments for additional microwave lines.

Original language	English (US)
Pages (from-to)	107-111
Number of pages	5
Journal	Infrared Physics and Technology
Volume	38
Issue number	2
DOIs	https://doi.org/10.1016/S1350-4495(96)00036-9
State	Published - Mar 1997
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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title = "Double resonance measurements of far infrared lasing transitions in methanol",

abstract = "In this work, precise frequencies have been measured for two important far-infrared (FIR) laser transitions in methanol. These are optically pumped by the 9P(16) CO2 laser line at an offset of +64 MHz from the line center, using infrared (IR)-millimetrewave (MMW) double resonance (DR) techniques. The two measured FIR lines are at 525,427.902 and 477,790.879 MHz, with an estimated precision of ± 50 kHz. Another line has been observed at 573,025.151 MHz. It corresponds to an absorption transition whose lower level is the upper pumped level. The measurements provide a valuable confirmation of the assignments of the IR as well as the FIR transitions. In addition, accurate frequencies for several transitions have been determined in the ground vibrational state in the range 109-127 GHz and provide assignments for additional microwave lines.",

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T1 - Double resonance measurements of far infrared lasing transitions in methanol

AU - Mukhopadhyay, I.

AU - Sastry, K. V.L.N.

AU - Crownover, Richard L.

AU - DeLucia, Frank C.

PY - 1997/3

Y1 - 1997/3

N2 - In this work, precise frequencies have been measured for two important far-infrared (FIR) laser transitions in methanol. These are optically pumped by the 9P(16) CO2 laser line at an offset of +64 MHz from the line center, using infrared (IR)-millimetrewave (MMW) double resonance (DR) techniques. The two measured FIR lines are at 525,427.902 and 477,790.879 MHz, with an estimated precision of ± 50 kHz. Another line has been observed at 573,025.151 MHz. It corresponds to an absorption transition whose lower level is the upper pumped level. The measurements provide a valuable confirmation of the assignments of the IR as well as the FIR transitions. In addition, accurate frequencies for several transitions have been determined in the ground vibrational state in the range 109-127 GHz and provide assignments for additional microwave lines.

AB - In this work, precise frequencies have been measured for two important far-infrared (FIR) laser transitions in methanol. These are optically pumped by the 9P(16) CO2 laser line at an offset of +64 MHz from the line center, using infrared (IR)-millimetrewave (MMW) double resonance (DR) techniques. The two measured FIR lines are at 525,427.902 and 477,790.879 MHz, with an estimated precision of ± 50 kHz. Another line has been observed at 573,025.151 MHz. It corresponds to an absorption transition whose lower level is the upper pumped level. The measurements provide a valuable confirmation of the assignments of the IR as well as the FIR transitions. In addition, accurate frequencies for several transitions have been determined in the ground vibrational state in the range 109-127 GHz and provide assignments for additional microwave lines.

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