Abstract.
We have observed the photoassociative spectra of colliding ultracold 39K and 85Rb atoms to produce KRb* in all eight bound electronic states correlating with the 39K (4s) + 85Rb(5p 1/2 and 5p 3/2) asymptotes. These electronically excited KRb* ultracold molecules are detected after their radiative decay to the metastable triplet (a \(^{3}\Sigma^{ + })\) state and (in some cases) the singlet (X \(^{1}\Sigma^{ + })\) ground state. The triplet (a \(^{3}\Sigma^{ + })\) ultracold molecules are detected by two-photon ionization at 602.5 nm to form KRb + , followed by time-of-flight mass spectroscopy. We are able to assign a majority of the spectrum to three states (2(0 + ), 2(0-), 2(1)) in a lower triad of states with similar C 6 values correlating to the K(4s) + Rb (5p 1/2) asymptote; and to five states in an upper triad of three states (3(0 + ), 3(0-), 3(1)) and a dyad of two states (4(1), 1(2)), with one set of similar C 6 values within the upper triad and a different set of similar C 6 values within the dyad. We are also able to make connection with the short-range spectra of Kasahara et al. [J. Chem. Phys. 111, 8857 (1999)], identifying three of our levels as v = 61, 62 and 63 of the 1\(^{1}\Pi \sim \) 4(1) state they observed. We also argue that ultracold photoassociation to levels between the K(4s) + Rb (5p 3/2) and K(4s) + Rb (5p 1/2) asymptotes may be weakly or strongly predissociated and therefore difficult to observe by ionization of a \(^{3}\Sigma^{ + }\) (or X \(^{1}\Sigma^{ + })\) molecules; we do know from Kasahara et al. that levels of the 1\(^{1}\Pi \sim \) 4(1) and 2\(^{1}\Pi \sim \) 5(1) states in the intra-asymptote region are predissociated. A small fraction (\(\le \)1/3) of the triplet (a \(^{3}\Sigma^{ + })\) ultracold molecules formed are trapped in the weak magnetic field of our magneto-optical trap (MOT).
Similar content being viewed by others
References
J. Weiner, V.S. Bagnato, S.C. Zilio, P.S. Julienne, Rev. Mod. Phys. 71, 1 (1999)
W.D. Phillips, Rev. Mod. Phys. 70, 721 (1998)
S. Chu, Rev. Mod. Phys. 70, 685 (1998)
C.N. Cohen-Tannoudji, Rev. Mod. Phys. 70, 707 (1998)
W. Ketterle, Rev. Mod. Phys. 74, 1131 (2002)
E.A. Cornell, C.E. Wieman, Rev. Mod. Phys. 74, 875 (2002)
A. Fioretti, D. Comparat, A. Crubellier, O. Dulieu, F. Masnou-Seeuws, P. Pillet, Phys. Rev. Lett. 80, 4402 (1998)
J.T. Bahns, P.L. Gould, W.C. Stwalley, Adv. At. Mol. Opt. Phys. 42, 171 (2000)
W.C. Stwalley, H. Wang, J. Mol. Spectrosc. 195, 194 (1999)
F. Masnou-Seeuws, P. Pillet, Adv. At. Mol. Opt. Phys. 47, 53 (2001)
U. Schlöder, C. Silber, C. Zimmermann, Appl. Phys. B. 73, 801 (2001)
T. Takekoshi, B.M. Patterson, R.J. Knize, Phys. Rev. Lett. 81, 5105 (1998)
N. Vanhaecke, W. de Souza Melo, B.L. Tolra, D. Comparat, P. Pillet, Phys. Rev. Lett. 89, 063001 (2002)
J. Herbig, T. Kramer, M. Mark, T. Weber, C. Chin, H.-C. Nägerl, R. Grimm, Science 301, 1510 (2003)
C.C. Chin, A.J. Kerman, V. Vuletic, S. Chu, Phys. Rev. Lett. 90, 033201 (2003)
S. Dürr, T. Volz, A. Marie, G. Rempe, Phys. Rev. Lett. 92, 020406 (2004)
K. Xu, T. Mukaiyama, J.R. Abo-Shaeer, J.K. Chin, D.E. Miller, W. Ketterle, Phys. Rev. Lett. 91, 210402 (2003)
S. Jochim, M. Bartenstein, A. Altmeyer, G. Hendl, S. Riedl, C. Chin, J. Hecker Denschlag, R. Grimm, Science 302, 2101 (2003)
J. Cubizolles, J. Bourdel, S.J.J.M.F. Kokkelmans, G.V. Shlyapnikov, C. Salomon, Phys. Rev. Lett. 91, 240401 (2003)
K.E. Strecker, G.B. Partridge, R.G. Hulet, Phys. Rev. Lett. 91, 080406 (2003)
M.W. Zwierlein, C.A. Stan, C.H. Schunk, S.M.F. Raupach, S. Gupta, Z. Hadzibabic, W. Ketterle, Phys. Rev. Lett. 91, 250401 (2003)
C.A. Regal, C. Ticknor, J.L. Bohn, D.S. Jin, Nature 424, 47 (2003)
M. Greiner, C.A. Regal, D.S. Jin, Nature 426, 537 (2003)
D.S. Petrov, C. Salomon, G.V. Shlyapnikov, Phys. Rev. Lett. 93, 090404 (2004)
W.C. Stwalley, in State-to-State Chemistry, edited by P.R. Brooks, E.F. Hayes, Am. Chem. Soc. Symp. Ser. 56, 247 (1977)
W.C. Stwalley, Can. J. Chem. 82, 1 (2004)
W.C. Stwalley, Eur. J. Phys. D 31, 221 (2004)
H. Wang, W.C. Stwalley, J. Chem. Phys. 108, 5767 (1998)
A.J. Kerman, J.M. Sage, S. Sainis, T. Bergeman, D. DeMille, Phys. Rev. Lett. 92, 033004 (2004)
A.J. Kerman, J.M. Sage, S. Sainis, T. Bergeman, D. DeMille, Phys. Rev. Lett. 92, 153001 (2004)
T. Bergeman, A.J. Kerman, J. Sage, S. Sainis, D. DeMille, Eur. J. Phys. D 31, 179 (2004)
J.P. Shaffer, W. Chalupczak, N.P. Bigelow, Phys. Rev. Lett. 82, 1224 (1999)
H. Wang, Bull. Am. Phys. Soc. 48, J1.025 (2003)
M.W. Mancini, G.D. Telles, A.R.L. Caires, V.S. Bagnato, L.G. Marcassa, Phys. Rev. Lett. 92, 133203 (2004)
S. Inouye, J. Goldwin, M.L. Olsen, C. Ticknor, J.L. Bohn, D.S. Jin, Phys. Rev. Lett. 93, 183201 (2004)
C.A. Stan, M.W. Zwierlein, C.H. Schunck, S.M.F. Raupach, W. Ketterle, Phys. Rev. Lett. 93, 143001 (2004)
J.D. Weinstein, R. DeCarvalho, T. Guillet, B. Friedrich, J.M. Doyle, Nature 395, 148 (1998)
H.L. Bethlem, G. Berden, F.M.H. Crompvoets, R.T. Jongma, A.J.A. Van Roij, G. Meijer, Nature 406, 491 (2000)
F.M.H. Crompvoets, H.L. Bethlem, R.T. Jongma, G. Meijer, Nature 411, 174 (2001)
D. Wang, J. Qi, M.F. Stone, O. Nikolayeva, H. Wang, B. Hattaway, S.D. Gensemer, P.L. Gould, E.E. Eyler, W.C. Stwalley, preprint arXiv:physics/0410220
J.M. Walter, S. Barratt, Proc. Roy. Soc. Lond. 119, 257 (1928)
K.P. Huber, G. Herzberg, Molecular Spectra and Molecular Structure IV. Constants of Diatomic Molecules (Van Nostrand, NY, 1979)
J.C. Whitehead, R. Grice, Faraday Discuss. Chem. Soc. 55, 320 (1973)
R. Beuc, S. Milosevic, G. Pichler, J. Phys. B 17, 739 (1984)
H. Skenderović, R. Beuc, T. Ban, G. Pichler, Eur. Phys. J. D 19, 49 (2002)
A.J. Ross, C. Effantin, P. Crozet, E. Boursey, J. Phys. B 23, L247 (1990)
N. Okada, S. Kasahara, T. Ebi, M. Baba, H. Katô, J. Chem. Phys. 105, 3458 (1996)
S. Kasahara, C. Fujiwara, N. Okada, H. Katô, J. Chem. Phys. 111, 8857 (1999)
C. Amiot, J. Verges, C. Effantin, J. d’Incan, Chem. Phys. Lett. 321, 21 (2000)
C. Amiot, J. Verges, J. Chem. Phys. 112, 7068 (2000)
C. Amiot, J. Verges, J. d’Incan, C. Effantin, Chem. Phys. Lett. 315, 55 (1999)
C. Amiot, J. Mol. Spectrosc. 203, 126 (2000)
Y. Lee, C. Yun, Y. Yoon, T. Kim, B. Kim, J. Chem. Phys. 115, 7413 (2001)
W.C. Stwalley, J. Chem. Phys. (2004, submitted)
S. Rousseau, A.R. Allouche, M. Aubert-Frécon, J. Mol. Spectrosc. 203, 235 (2000)
S.J. Park, Y.J. Choi, Y.S. Lee, G.-H. Jeung, Chem. Phys. 257, 135 (2000)
S. Kotochigova, P.S. Julienne, E. Tiesinga, Phys. Rev. A 68, 022501 (2003)
A. Derevianko, J.F. Babb, A. Dalgarno, Phys. Rev. A 63, 052704 (2001)
S.G. Porsev, A. Derevianko, J. Chem. Phys. 119, 844 (2003)
W.T. Zemke, W.C. Stwalley, J. Chem. Phys. 120, 88 (2004)
W.T. Zemke, R. Côté, W.C. Stwalley, Phys. Rev. A (2004, to be submitted)
M. Marinescu, H.R. Sadeghpour, Phys. Rev. A 59, 390 (1999)
W.T. Zemke, W.C. Stwalley, Phys. Rev. A (2004, to be submitted)
M. Movre, R. Beuc, Phys. Rev. A 31, 2957 (1984)
B. Bussery, Y. Achkar, M. Aubert-Frécon, Chem. Phys. 116, 319 (1987)
M.T. Djerad, F. Gounand, A. Kumar, M. Cheret, J. Chem. Phys. 97, 8334 (1992)
C. Gabbanini, M. Biagini, S. Gozzini, A. Lucchesini, A. Kopystynska, J. Quant. Spectrosc. Radiat. Transfer 47, 103 (1992)
C. Vadla, S. Knezovic, M. Movre, J. Phys. B 25, 1337 (1992)
L.G. Marcassa, G.D. Telles, S.R. Muniz, V.S. Bagnato, Phys. Rev. A 63, 013413 (2001)
G. Ferrari, M. Inguscio, W. Jastrzebski, G. Modugno, G. Roati, A. Simoni, Phys. Rev. Lett. 89, 053202 (2002)
J. Goldwin, S.B. Papp, B. DeMarco, D.S. Jin, Phys. Rev. A 65, 021402 (2002)
G. Modugno, G. Roati, F. Riboli, F. Ferlaino, R.J. Brecha, M. Inguscio, Science 297, 2240 (2002)
M.S. Stone, M.S. thesis, SUNY Stony Brook 2001
H. Wang, P.L. Gould, W.C. Stwalley, Phys. Rev. A 53, R1216 (1996)
W. Ketterle, K. Davis, M. Joffe, A. Martin, D.E. Pritchard, Phys. Rev. Lett. 70, 2253 (1993)
G. Barwood, P. Gill, W.R.C. Rowley, Appl. Phys. B 53, 142 (1991)
M. Pichler, H.M. Chen, H. Wang, W.C. Stwalley, A.J. Ross, F. Martin, M. Aubert-Frécon, I. Russier-Antoine, J. Chem. Phys. 118, 7837 (2003)
R.J. Le Roy, R.B. Bernstein, J. Chem. Phys. 52, 3869 (1970)
W.C. Stwalley, Chem. Phys. Lett. 6, 241 (1970)
C. Ryu, R.S. Freeland, R. Wynar, D. Comparat, D.J. Heinzen, abstract for Cold Molecules 2002, Les Houches, France (unpublished); also R.S. Freeland, Ph.D. thesis, University of Texas, pp. 112-122 (2001)
H. Wang, P.L. Gould, W.C. Stwalley, Phys. Rev. Lett. 80, 476 (1998)
Author information
Authors and Affiliations
Corresponding author
Additional information
Received: 22 September 2004, Published online: 23 November 2004
PACS:
33.20.Fb Raman and Rayleigh spectra (including optical scattering) - 34.20.Cf Interatomic potentials and forces - 33.80.Ps Optical cooling of molecules; trapping
Rights and permissions
About this article
Cite this article
Wang, D., Qi, J., Stone, M.F. et al. The photoassociative spectroscopy, photoassociative molecule formation, and trapping of ultracold \(\mathsf{^{39}K^{85}Rb}\) . Eur. Phys. J. D 31, 165–177 (2004). https://doi.org/10.1140/epjd/e2004-00162-7
Issue Date:
DOI: https://doi.org/10.1140/epjd/e2004-00162-7