Ionization of Na Rydberg atoms by a 79-GHz microwave field

©2016 American Physical Society. We have measured the ionization fields for Na Rydberg states of n≥26 by a 79-GHz microwave field. At low n, where the microwave frequency ω is one-third the classical Kepler frequency ωK, which is equal to the 1/n3 spacing between n states, the ionization field is ≈1...

Full description

Saved in:
Bibliographic Details
Main Authors: A. Arakelyan, J. Nunkaew, T. F. Gallagher
Format: Journal
Published: 2018
Subjects:
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84996590083&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/56315
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Chiang Mai University
id th-cmuir.6653943832-56315
record_format dspace
spelling th-cmuir.6653943832-563152018-09-05T03:14:21Z Ionization of Na Rydberg atoms by a 79-GHz microwave field A. Arakelyan J. Nunkaew T. F. Gallagher Physics and Astronomy ©2016 American Physical Society. We have measured the ionization fields for Na Rydberg states of n≥26 by a 79-GHz microwave field. At low n, where the microwave frequency ω is one-third the classical Kepler frequency ωK, which is equal to the 1/n3 spacing between n states, the ionization field is ≈1/3n5, in atomic units. As n is raised ωK decreases, and the ionization field rises above 1/3n5, reaching a constant value when ω=ωK. At very high n, where ω>1/2n2, single photoionization is possible, and the measured rate agrees with the calculated value. These measurements, together with those done previously, connect the processes of field ionization and photoionization in Na. At low n and radio frequencies ionization is simply field ionization, and at very high n it occurs by photoionization, single-photon absorption. These measurements also show that microwave ionization of Rydberg atoms at 79 GHz results in significant populations' being left in the very high-lying states. 2018-09-05T03:14:21Z 2018-09-05T03:14:21Z 2016-01-01 Journal 24699934 24699926 2-s2.0-84996590083 10.1103/PhysRevA.94.053416 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84996590083&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/56315
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Physics and Astronomy
spellingShingle Physics and Astronomy
A. Arakelyan
J. Nunkaew
T. F. Gallagher
Ionization of Na Rydberg atoms by a 79-GHz microwave field
description ©2016 American Physical Society. We have measured the ionization fields for Na Rydberg states of n≥26 by a 79-GHz microwave field. At low n, where the microwave frequency ω is one-third the classical Kepler frequency ωK, which is equal to the 1/n3 spacing between n states, the ionization field is ≈1/3n5, in atomic units. As n is raised ωK decreases, and the ionization field rises above 1/3n5, reaching a constant value when ω=ωK. At very high n, where ω>1/2n2, single photoionization is possible, and the measured rate agrees with the calculated value. These measurements, together with those done previously, connect the processes of field ionization and photoionization in Na. At low n and radio frequencies ionization is simply field ionization, and at very high n it occurs by photoionization, single-photon absorption. These measurements also show that microwave ionization of Rydberg atoms at 79 GHz results in significant populations' being left in the very high-lying states.
format Journal
author A. Arakelyan
J. Nunkaew
T. F. Gallagher
author_facet A. Arakelyan
J. Nunkaew
T. F. Gallagher
author_sort A. Arakelyan
title Ionization of Na Rydberg atoms by a 79-GHz microwave field
title_short Ionization of Na Rydberg atoms by a 79-GHz microwave field
title_full Ionization of Na Rydberg atoms by a 79-GHz microwave field
title_fullStr Ionization of Na Rydberg atoms by a 79-GHz microwave field
title_full_unstemmed Ionization of Na Rydberg atoms by a 79-GHz microwave field
title_sort ionization of na rydberg atoms by a 79-ghz microwave field
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84996590083&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/56315
_version_ 1681424669080551424