ترغب بنشر مسار تعليمي؟ اضغط هنا

On the B^1Pi state of NaCs

58   0   0.0 ( 0 )
 نشر من قبل Wlodzimierz Jastrzebski
 تاريخ النشر 2009
  مجال البحث فيزياء
والبحث باللغة English




اسأل ChatGPT حول البحث

The B^1Pi <- X^1Sigma^+ system of NaCs molecule is investigated experimentally by polarization labelling spectroscopy technique. The inverted perturbation approach method is used to construct the potential energy curve of the B^1Pi state, providing accurate eigenenergies for vibrational levels v = 0 - 15.

قيم البحث

اقرأ أيضاً

Thallium monofluoride (TlF) is a prime candidate molecule for precision measurements aimed at discovering new physics. Optical cycling on the B $leftarrow$ X transition around 271 nm enhances this potential. Hyperfine resolved ultraviolet spectra hav e been reported to determine the degree of rotational level mixing in the B-state and the efficiency of laser cooling on the B $leftarrow$ X transition [E. B. Norrgard ${it et~al.}$, Physical Review A ${bf 95}$, 062506 (2017)]. Using these high-resolution spectra, the hyperfine structure in the B-state of TlF is re-analysed and the magnitude of the $Lambda$-doubling in the B-state is discussed.
49 - S. V. Kozlov , E. A. Pazyuk , 2016
We performed a diabatization of the mutually perturbed $1^1Pi$ and $2^1Pi$ states of KRb based on both electronic structure calculation and direct coupled-channel deperturbation analysis of experimental energies. The potential energy curves (PECs) of the diabatic states and their scalar coupling were constructed from the textit{ab initio} adiabatic PECs by analytically integrating the radial $langle psi_1^{ad}|partial /partial R|psi_2^{ad}rangle$ matrix element obtained by a finite-difference method. The diabatic potentials and electronic coupling function were refined by the least squares fitting of the rovibronic termvalues of the $1^1Pisim 2^1Pi$ complex. The empirical PECs combined with the coupling function as well as the diabatized spin-orbit coupling and transition dipole matrix elements are useful for further deperturbation treatment of both singlet and triplet states manifold.
Following the recent work of Eriksen et al. [arXiv:2008.02678], we report the performance of the textit{Configuration Interaction using a Perturbative Selection made Iteratively} (CIPSI) method on the non-relativistic frozen-core correlation energy o f the benzene molecule in the cc-pVDZ basis. Following our usual protocol, we obtain a correlation energy of $-863.4$ m$E_h$ which agrees with the theoretical estimate of $-863$ m$E_h$ proposed by Eriksen et al. using an extensive array of highly-accurate new electronic structure methods.
Aluminum monochloride (AlCl) has been proposed as an excellent candidate for laser cooling. Here we present absorption spectroscopy measurements on the $A^1Pi leftarrow X^1Sigma^+$ transition in AlCl inside a cryogenic helium buffer-gas beam cell. Th e high resolution absorption data enables a rigorous, quantitative comparison with our high-level ab initio calculations of the electronic and rovibronic energies, providing a comprehensive picture of the AlCl quantum structure. The combination of high resolution spectral data and theory permits the evaluation of spectroscopic constants and associated properties, like equilibrium bond length, with an order of magnitude higher precision. Based on the measured molecular equilibrium constants of the $A^1Pi$ state, we estimate a Franck-Condon factor of the $A^1Pi leftarrow X^1Sigma^+$ of 99.88%, which confirms that AlCl is amenable to laser cooling.
The effects of final state interactions (FSI) in hadronic B-decays are investigated. The model for FSI, based on Regge phenomenology of high-energy hadronic interactions is proposed. It is shown that this model explains the pattern of phases in matri x elements of $Btopipi$ and $Btorhorho$ decays. These phases play an important role for CP-violation in B-decays. The most precise determination of the unitarity triangle angle $alpha$ from $B_dto rhopi$ decays is performed. The relation between CP-asymmetries in $Bto Kpi$ decays is discussed. It is emphasized that the large distance FSI can explain the structure of polarizations of the vector mesons in B-decays and other puzzles like a very large branching ratio of the B-decay to $barXi_cLambda_c$.
التعليقات
جاري جلب التعليقات جاري جلب التعليقات
سجل دخول لتتمكن من متابعة معايير البحث التي قمت باختيارها
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا