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Title: Magnetic Trapping and Zeeman Relaxation of NH (X {sup 3}{sigma}{sup -})

Abstract

NH radicals are magnetically trapped and their Zeeman relaxation and energy transport collision cross sections with helium are measured. Continuous buffer-gas loading of the trap is direct from a room-temperature molecular beam. The Zeeman relaxation (inelastic) cross section of magnetically trapped electronic, vibrational, and rotational ground state NH molecules in collisions with {sup 3}He is measured to be 3.8{+-}1.1x10{sup -19} cm{sup 2} at 710 mK. The NH-He energy transport cross section is also measured, indicating a ratio of diffusive to inelastic cross sections of {gamma}=7x10{sup 4}, in agreement with recent theory [R. V. Krems, H. R. Sadeghpour, A. Dalgarno, D. Zgid, J. Klos, and G. Chalasinski, Phys. Rev. A 68, 051401 (2003)].

Authors:
; ;  [1];  [2];  [3];  [2];  [4];  [2]
  1. Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
  2. (United States)
  3. Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)
  4. Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138 (United States)
Publication Date:
OSTI Identifier:
20951396
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.98.213001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CROSS SECTIONS; GROUND STATES; HELIUM; HELIUM 3; MOLECULAR BEAMS; RELAXATION; TEMPERATURE RANGE 0273-0400 K; TRAPPING; TRAPS; ZEEMAN EFFECT

Citation Formats

Campbell, Wesley C., Tsikata, Edem, Buuren, Laurens D. van, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Lu, H.-I, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Doyle, John M., and Department of Physics, Harvard University, Cambridge, Massachusetts 02138. Magnetic Trapping and Zeeman Relaxation of NH (X {sup 3}{sigma}{sup -}). United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.213001.
Campbell, Wesley C., Tsikata, Edem, Buuren, Laurens D. van, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Lu, H.-I, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Doyle, John M., & Department of Physics, Harvard University, Cambridge, Massachusetts 02138. Magnetic Trapping and Zeeman Relaxation of NH (X {sup 3}{sigma}{sup -}). United States. doi:10.1103/PHYSREVLETT.98.213001.
Campbell, Wesley C., Tsikata, Edem, Buuren, Laurens D. van, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Lu, H.-I, Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138, Doyle, John M., and Department of Physics, Harvard University, Cambridge, Massachusetts 02138. Fri . "Magnetic Trapping and Zeeman Relaxation of NH (X {sup 3}{sigma}{sup -})". United States. doi:10.1103/PHYSREVLETT.98.213001.
@article{osti_20951396,
title = {Magnetic Trapping and Zeeman Relaxation of NH (X {sup 3}{sigma}{sup -})},
author = {Campbell, Wesley C. and Tsikata, Edem and Buuren, Laurens D. van and Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138 and Lu, H.-I and Harvard-MIT Center for Ultracold Atoms, Cambridge, Massachusetts 02138 and Doyle, John M. and Department of Physics, Harvard University, Cambridge, Massachusetts 02138},
abstractNote = {NH radicals are magnetically trapped and their Zeeman relaxation and energy transport collision cross sections with helium are measured. Continuous buffer-gas loading of the trap is direct from a room-temperature molecular beam. The Zeeman relaxation (inelastic) cross section of magnetically trapped electronic, vibrational, and rotational ground state NH molecules in collisions with {sup 3}He is measured to be 3.8{+-}1.1x10{sup -19} cm{sup 2} at 710 mK. The NH-He energy transport cross section is also measured, indicating a ratio of diffusive to inelastic cross sections of {gamma}=7x10{sup 4}, in agreement with recent theory [R. V. Krems, H. R. Sadeghpour, A. Dalgarno, D. Zgid, J. Klos, and G. Chalasinski, Phys. Rev. A 68, 051401 (2003)].},
doi = {10.1103/PHYSREVLETT.98.213001},
journal = {Physical Review Letters},
number = 21,
volume = 98,
place = {United States},
year = {Fri May 25 00:00:00 EDT 2007},
month = {Fri May 25 00:00:00 EDT 2007}
}