skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Formation of ultracold {sup 7}Li{sup 85}Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy

Abstract

We report the formation of ultracold {sup 7}Li{sup 85}Rb molecules in the a{sup 3}Σ{sup +} electronic state by photoassociation (PA) and their detection via resonantly enhanced multiphoton ionization (REMPI). With our dual-species Li and Rb magneto-optical trap apparatus, we detect PA resonances with binding energies up to ∼62 cm{sup −1} below the {sup 7}Li 2s {sup 2}S{sub 1/2} + {sup 85}Rb 5p {sup 2}P{sub 1/2} asymptote. In addition, we use REMPI spectroscopy to probe the a{sup 3}Σ{sup +} state and excited electronic 3{sup 3}Π and 4{sup 3}Σ{sup +} states and identify a{sup 3}Σ{sup +} (v″ = 7–13), 3{sup 3}Π (v{sub Π}′ = 0–10), and 4{sup 3}Σ{sup +} (v{sub Σ}′ = 0–5) vibrational levels. Our line assignments agree well with ab initio calculations. These preliminary spectroscopic studies on previously unobserved electronic states are crucial to discovering transition pathways for transferring ultracold LiRb molecules created via PA to deeply bound rovibrational levels of the electronic ground state.

Authors:
; ; ;  [1]; ;  [1];  [2]
  1. Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22415538
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 142; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BINDING ENERGY; ELECTRONIC STRUCTURE; GROUND STATES; LITHIUM 7; MOLECULES; PHOTOIONIZATION; PROBES; RUBIDIUM 85; TRAPS; TRIPLETS; VIBRATIONAL STATES

Citation Formats

Altaf, Adeel, E-mail: adeelmala@gmail.com, Dutta, Sourav, Lorenz, John, Pérez-Ríos, Jesús, Chen, Yong P., Elliott, D. S., E-mail: elliottd@purdue.edu, and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907. Formation of ultracold {sup 7}Li{sup 85}Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy. United States: N. p., 2015. Web. doi:10.1063/1.4914917.
Altaf, Adeel, E-mail: adeelmala@gmail.com, Dutta, Sourav, Lorenz, John, Pérez-Ríos, Jesús, Chen, Yong P., Elliott, D. S., E-mail: elliottd@purdue.edu, & School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907. Formation of ultracold {sup 7}Li{sup 85}Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy. United States. doi:10.1063/1.4914917.
Altaf, Adeel, E-mail: adeelmala@gmail.com, Dutta, Sourav, Lorenz, John, Pérez-Ríos, Jesús, Chen, Yong P., Elliott, D. S., E-mail: elliottd@purdue.edu, and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907. Sat . "Formation of ultracold {sup 7}Li{sup 85}Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy". United States. doi:10.1063/1.4914917.
@article{osti_22415538,
title = {Formation of ultracold {sup 7}Li{sup 85}Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy},
author = {Altaf, Adeel, E-mail: adeelmala@gmail.com and Dutta, Sourav and Lorenz, John and Pérez-Ríos, Jesús and Chen, Yong P. and Elliott, D. S., E-mail: elliottd@purdue.edu and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907},
abstractNote = {We report the formation of ultracold {sup 7}Li{sup 85}Rb molecules in the a{sup 3}Σ{sup +} electronic state by photoassociation (PA) and their detection via resonantly enhanced multiphoton ionization (REMPI). With our dual-species Li and Rb magneto-optical trap apparatus, we detect PA resonances with binding energies up to ∼62 cm{sup −1} below the {sup 7}Li 2s {sup 2}S{sub 1/2} + {sup 85}Rb 5p {sup 2}P{sub 1/2} asymptote. In addition, we use REMPI spectroscopy to probe the a{sup 3}Σ{sup +} state and excited electronic 3{sup 3}Π and 4{sup 3}Σ{sup +} states and identify a{sup 3}Σ{sup +} (v″ = 7–13), 3{sup 3}Π (v{sub Π}′ = 0–10), and 4{sup 3}Σ{sup +} (v{sub Σ}′ = 0–5) vibrational levels. Our line assignments agree well with ab initio calculations. These preliminary spectroscopic studies on previously unobserved electronic states are crucial to discovering transition pathways for transferring ultracold LiRb molecules created via PA to deeply bound rovibrational levels of the electronic ground state.},
doi = {10.1063/1.4914917},
journal = {Journal of Chemical Physics},
number = 11,
volume = 142,
place = {United States},
year = {Sat Mar 21 00:00:00 EDT 2015},
month = {Sat Mar 21 00:00:00 EDT 2015}
}