Photoassociation to the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:msup><mml:mspace width="0.16em" /><mml:mn>1</mml:mn></mml:msup><mml:mspace width="-0.16em" /><mml:msubsup><mml:mi>Σ</mml:mi><mml:mi>g</mml:mi><mml:mo>+</mml:mo></mml:msubsup></mml:mrow></mml:math>state in ultracold<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>85</mml:mn></mml:msup></mml:math>Rb<mml:math xmlns:mml="http://

Bellos, Michael; Carollo, Ryan; Rahmlow, David; Banerjee, Jayita; Eyler, E. E.; Gould, P. L.; Stwalley, William C.

doi:10.1103/physreva.86.033407

Cited by 13 publications

(14 citation statements)

References 45 publications

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“…The apparatus used for this measurement has been described previously [25] and is only briefly summarized here. The starting point is a magneto-optical trap (MOT) that traps about 8 × 10 7 atoms at a peak density of 1 × 10 11 cm −3 and a temperature of 120 µK.…”

Section: Methodsmentioning

confidence: 99%

Upper bound to the ionization energy of85Rb2

et al. 2013

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We report an upper bound to the ionization energy of 85 Rb2 of 31 348.0(6) cm −1 , which also provides a lower bound to the dissociation energy D0 of 85 Rb + 2 of 6 307.5(6) cm −1. These bounds were measured by the onset of autoionization of excited states of 85 Rb2 below the 5s+7p atomic limit. We form 85 Rb2 molecules via photoassociation of ultracold 85 Rb atoms, and subsequently excite the molecules by single-photon ultraviolet transitions to states above the ionization threshold.

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Section: Methodsmentioning

confidence: 99%

Upper bound to the ionization energy of85Rb2

et al. 2013

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“…Nuclear spin must flip, however, to explain the states we see. Our MOT selects primarily for the F = 3 state, although a small F = 2 population can be observed in spectroscopy as "hyperfine ghosts" [29,30]. Since this population is spectroscopically distinct, we know that we are selecting only for F = 3 atoms in our initial photoassociation step.…”

Section: High-resolution Scansmentioning

confidence: 99%

High-resolution spectroscopy of Rydberg molecular states of Rb285 near the 5s+7p asymptote

et al. 2017

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Rydberg molecules, often exemplified by long-range "trilobite" molecules, are a subject of much recent interest at high principal quantum number n. States that use the same bonding mechanism can exist at much lower n and less-extreme internuclear separations that are still quite long range. We use a high-resolution pulsed amplifier to study previously-detected transitions to a low-n Rydberg molecular state near the 5s + 7p asymptote in 85 Rb2. The observed line structure is modeled using precise ground-state positions and a lower bound of τ > 1.1 × 10 −9 s is set on the excited-state autoionization lifetime.

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“…As with any use of a Franck-Condon factor, the R-dependence of the transition dipole moment may play an important role that is neglected by our approximation. The 2 1 Σ + g ∼ 2 (0 + g ) state studied in [2,3] is an excellent example. The case (c) transition dipole is constant and large at long range, but at short range (in the region of our experiment) it drops rapidly toward zero [26].…”

Section: Photoassociation Modelmentioning

confidence: 99%

“…In [1] we studied blue-detuned and short-range photoassociation to the 4 different Ω = 0 + , 0 − , 1, and 2 components of the 1 3 Π g state, including various spectra. We also studied other shortrange photoassociation spectra to the 2 1 Σ + g state [2,3], including a single rovibrational level in the short-range state (v ′ = 111, J ′ = 5) that is perturbed by a single, predominately long-range rovibrational level (v ′ = 155, J ′ = 5) of the 1 1 Π g, Ω=1 state, the two levels being separated by ∼ 0.017 cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Short-range photoassociation from the inner wall of the lowest triplet potential of⁸⁵Rb₂

Carollo¹,

Carini²,

Eyler³

et al. 2016

J. Phys. B: At. Mol. Opt. Phys.

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Ultracold photoassociation is typically performed at large internuclear separations, where the scattering wavefunction amplitude is large and Franck-Condon overlap is maximized. Recently, work by this group and others on alkali-metal diatomics has shown that photoassociation can efficiently form molecules at short internuclear distance in both homonuclear and heteronuclear dimers. We propose that this short-range photoassociation is due to excitation near the wavefunction amplitude maximum at the inner wall of the lowest triplet potential. We show that Franck-Condon factors from the highest-energy bound state can almost precisely reproduce Franck-Condon factors from a low-energy scattering state, and that both calculations match experimental data from the near-zero positive-energy scattering state with reasonable accuracy. We also show that the corresponding photoassociation from the inner wall of the ground-state singlet potential at much shorter internuclear distance is weaker and undetectable under our current experimental conditions. We predict from Franck-Condon factors that the strongest of these weaker short-range photoassociation transitions are one order of magnitude below our current sensitivity.

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Photoassociation to the21Σg+state in ultracold85Rb
Michael Bellos
¹
,
Ryan Carollo
²
,
David Rahmlow
³

et al.

Cited by 13 publications

References 45 publications

Upper bound to the ionization energy of85Rb2

Upper bound to the ionization energy of85Rb2

High-resolution spectroscopy of Rydberg molecular states of Rb285 near the 5s+7p asymptote

Short-range photoassociation from the inner wall of the lowest triplet potential of⁸⁵Rb₂

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Photoassociation to the21Σg+state in ultracold85RbMichael Bellos1, Ryan Carollo2, David Rahmlow3 et al.

Cited by 13 publications

References 45 publications

Upper bound to the ionization energy of85Rb2

Upper bound to the ionization energy of85Rb2

High-resolution spectroscopy of Rydberg molecular states of Rb285 near the 5s+7p asymptote

Short-range photoassociation from the inner wall of the lowest triplet potential of85Rb2

Contact Info

Product

Resources

About

Photoassociation to the21Σg+state in ultracold85Rb
Michael Bellos
¹
,
Ryan Carollo
²
,
David Rahmlow
³

et al.

Short-range photoassociation from the inner wall of the lowest triplet potential of⁸⁵Rb₂