The ground state of KRb from laser-induced fluorescence

Abstract

The A1 Sigma +-X1 Sigma + system of KRb was excited using a titanium-doped sapphire laser. Fluorescence spectra were recorded on a Bomem Fourier transform spectrometer, using an apodised linewidth of 0.045 cm-1. Rotational and vibrational constants are reported for the ground state, X1 Sigma +, covering the range 0<or=v<or=44 and J<141.

Theoretical study of highly-excited states of KRb molecule

“…1). In addition, there is good agreement in shapes, which is also noticeable in the cases of the unusual shapes displayed by the 4 1 Σ + , 5 1 Σ + and 3 3 Π states ( Fig. 1 and 2).…”

“…It is also possible to compare with the data of Lee at al. [11] for the 1 3 ∆ state, where in the case of T the results of Yiannopoulou et al [13] and Rousseau et al [14] lie within the range of 88 cm Using our calculations of potential energy curves we give an example (see Fig. 3) of a possible pathway for photoassociative formation of KRb in excited rovibrational levels of its ground electronic state X 1 Σ + .…”

“…Polar alkali molecules, and in particular KRb, have recently been the object of intensive experimental [1][2][3][4][5][6][7][8][9][10][11][12] and theoretical [13][14][15][16] studies. For instance, the KRb molecule often serves as an example of a reactive species in order to explain the collision rates of trapped and ultracold polar molecules (e.g.…”

Theoretical Study of the Electronic Structure of the KRb Molecule

“…For bound states with regular curve, using the code from Hutson (23), vibrational and rotational energies have been (3) 1 ⌸ have so far been investigated from high-resolution spectroscopy techniques and spectroscopic constants have been deduced. The ground state X 1 ⌺ ϩ was investigated from laserinduced fluorescence recorded on a Fourier transform spectrometer (FIL-FT) (24). The (1) and (2) 1 ⌸ states were investigated through Doppler-free optical-optical double-resonance polarization spectroscopy (25,1) is quite near the experimental value 4217.4 Ϯ 0.8 cm Ϫ1 (1).…”

Hyperfine structure of alkali-metal diatomic molecules

“…1 The 1 Values for 7 Li 133 Cs, KRb, and RbCs, obtained with similar methods, were presented previously [14,16]. The values in Table I differ slightly (by around 1% except for some values of eQq) calculations were performed at the equilibrium geometry for each molecule, R e = 2.88Å for LiNa [34], 3.32Å for LiK [35], 3.43Å for LiRb [36], 3.67Å for LiCs [37], 3.45Å for NaK [38], 3.64Å for NaRb [39], 3.85Å for NaCs [40], 4.07Å for KRb [41], 4.28Å for KCs [42], and 4.37Å for RbCs [43]. The values of the permanent dipole moments, not included in Table I, can be found in Ref.…”