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Inelastic Collisions of Atomic Thori...

Au, Yat Shan.

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Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3./
Author:	Au, Yat Shan.
Description:	106 p.
Notes:	Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.
Contained By:	Dissertation Abstracts International75-10B(E).
Subject:	Atomic physics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3626370
ISBN:	9781321013122

Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3.
Au, Yat Shan.

Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3. - 106 p.

Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.

Thesis (Ph.D.)--Harvard University, 2014.

We measure inelastic cross sections for atomic thorium (Th) and molecular thorium monoxide (ThO) in collisions with 3He at temperatures near 1 K. We determine the Zeeman relaxation cross section for Th ( 3F2) to be &sim; 2 x 10-17 cm -2 at 800 mK. We study electronic inelastic processes in Th ( 3P0) and find no quenching even after 106 collisions at 800 mK. We measure the vibrational quenching cross section for ThO (X, nu= 1)to be (7.9 +/- 2.7) x 10-19 cm-2 at 800 mK. Finally, we observe indirect evidence for ThO (X, nu = 0) 3He van der Waals complex formation, and measure the 3-body recombination rate constant to be Gamma3 = (8 +/- 2) x 10-33 cm6s-1 at 2.4~K. The stability of the ground Th (3F 2) state, metastable Th (3P0) state, and vibrational excited ThO (X, nu = 1) state provides data on anisotropic interactions in new systems and opens up the possibility for further studies and experiments, including trapping.

ISBN: 9781321013122Subjects--Topical Terms:

3173870
Atomic physics.

Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3.
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020 $a 9781321013122
035 $a (MiAaPQ)AAI3626370
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100 1 $a Au, Yat Shan. $3 3192845
245 1 0 $a Inelastic Collisions of Atomic Thorium and Molecular Thorium Monoxide with Cold Helium-3.
300 $a 106 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-10(E), Section: B.
500 $a Adviser: John Morrissey Doyle.
502 $a Thesis (Ph.D.)--Harvard University, 2014.
520 $a We measure inelastic cross sections for atomic thorium (Th) and molecular thorium monoxide (ThO) in collisions with 3He at temperatures near 1 K. We determine the Zeeman relaxation cross section for Th ( 3F2) to be &sim; 2 x 10-17 cm -2 at 800 mK. We study electronic inelastic processes in Th ( 3P0) and find no quenching even after 106 collisions at 800 mK. We measure the vibrational quenching cross section for ThO (X, nu= 1)to be (7.9 +/- 2.7) x 10-19 cm-2 at 800 mK. Finally, we observe indirect evidence for ThO (X, nu = 0) 3He van der Waals complex formation, and measure the 3-body recombination rate constant to be Gamma3 = (8 +/- 2) x 10-33 cm6s-1 at 2.4~K. The stability of the ground Th (3F 2) state, metastable Th (3P0) state, and vibrational excited ThO (X, nu = 1) state provides data on anisotropic interactions in new systems and opens up the possibility for further studies and experiments, including trapping.
590 $a School code: 0084.
650 4 $a Atomic physics. $3 3173870
650 4 $a Low temperature physics. $3 3173917
690 $a 0748
690 $a 0598
710 2 $a Harvard University. $b Physics. $3 2094825
773 0 $t Dissertation Abstracts International $g 75-10B(E).
790 $a 0084
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3626370