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Title: Investigation of Antirelaxation Coatings for Alkali-metal Vapor Cells using Surface Science Techniques

Abstract

Many technologies based on cells containing alkali-metal atomic vapor benefit from the use of antirelaxation surface coatings in order to preserve atomic spin polarization. In particular, paraffin has been used for this purpose for several decades and has been demonstrated to allow an atom to experience up to 10,000 collisions with the walls of its container without depolarizing, but the details of its operation remain poorly understood. We apply modern surface and bulk techniques to the study of paraffin coatings in order to characterize the properties that enable the effective preservation of alkali spin polarization. These methods include Fourier transform infrared spectroscopy, differential scanning calorimetry, atomic force microscopy, near-edge x-ray absorption fine structure spectroscopy, and x-ray photoelectron spectroscopy. We also compare the light-induced atomic desorption yields of several different paraffin materials. Experimental results include the determination that crystallinity of the coating material is unnecessary, and the detection of C=C double bonds present within a particular class of effective paraffin coatings. Further study should lead to the development of more robust paraffin antirelaxation coatings, as well as the design and synthesis of new classes of coating materials.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1041985
Report Number(s):
BNL-97663-2012-JA
Journal ID: ISSN 0021-9606; JCPSA6; TRN: US201212%%396
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 133; Journal Issue: 14; Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ATOMIC FORCE MICROSCOPY; ATOMS; CALORIMETRY; COATINGS; CONTAINERS; DESORPTION; DETECTION; DOUBLE BONDS; FINE STRUCTURE; PARAFFIN; POLARIZATION; PRESERVATION; SPECTROSCOPY; SPIN; SURFACE COATING; SYNTHESIS; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Seltzer, S, Michalak, D, Donaldson, M, Balabas, M, Barber, S, Bernasek, S, Bouchiat, M, Hexemer, A, Hibberd, A, and et al. Investigation of Antirelaxation Coatings for Alkali-metal Vapor Cells using Surface Science Techniques. United States: N. p., 2011. Web.
Seltzer, S, Michalak, D, Donaldson, M, Balabas, M, Barber, S, Bernasek, S, Bouchiat, M, Hexemer, A, Hibberd, A, & et al. Investigation of Antirelaxation Coatings for Alkali-metal Vapor Cells using Surface Science Techniques. United States.
Seltzer, S, Michalak, D, Donaldson, M, Balabas, M, Barber, S, Bernasek, S, Bouchiat, M, Hexemer, A, Hibberd, A, and et al. Sat . "Investigation of Antirelaxation Coatings for Alkali-metal Vapor Cells using Surface Science Techniques". United States.
@article{osti_1041985,
title = {Investigation of Antirelaxation Coatings for Alkali-metal Vapor Cells using Surface Science Techniques},
author = {Seltzer, S and Michalak, D and Donaldson, M and Balabas, M and Barber, S and Bernasek, S and Bouchiat, M and Hexemer, A and Hibberd, A and et al.},
abstractNote = {Many technologies based on cells containing alkali-metal atomic vapor benefit from the use of antirelaxation surface coatings in order to preserve atomic spin polarization. In particular, paraffin has been used for this purpose for several decades and has been demonstrated to allow an atom to experience up to 10,000 collisions with the walls of its container without depolarizing, but the details of its operation remain poorly understood. We apply modern surface and bulk techniques to the study of paraffin coatings in order to characterize the properties that enable the effective preservation of alkali spin polarization. These methods include Fourier transform infrared spectroscopy, differential scanning calorimetry, atomic force microscopy, near-edge x-ray absorption fine structure spectroscopy, and x-ray photoelectron spectroscopy. We also compare the light-induced atomic desorption yields of several different paraffin materials. Experimental results include the determination that crystallinity of the coating material is unnecessary, and the detection of C=C double bonds present within a particular class of effective paraffin coatings. Further study should lead to the development of more robust paraffin antirelaxation coatings, as well as the design and synthesis of new classes of coating materials.},
doi = {},
url = {https://www.osti.gov/biblio/1041985}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 14,
volume = 133,
place = {United States},
year = {2011},
month = {12}
}