The Beck group’s publications are listed here in reverse chronological order. In many cases atoms and ions are referred to using spectroscopic notation in which the neutral atom is given a Roman numeral I and positive ions are denoted by a Roman numeral one higher than the charge, for example Gd IV ≡ Gd3+. For descriptions of atomic properties studied by the Beck research group, see the research interests page.

Clicking the “draft” image will download a pdf file, though the published version is preferred, and the interested reader is encouraged to access them at one of the following links:  Phys. Rev. A (& Lett.)  J. Phys. B  Can. J. Phys.  Phys. Scr.  Chem. Phys. Lett.  Int. J. Quant. Chem.  J. Chem. Phys. 

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“Improved RCI techniques for atomic 4fn excitation energies and polarizabilities,”
Donald R. Beck and Lin Pan, J. Phys. B, accepted for publication (in press).
“Calculations of Hf− electron affinity and photodetachment partial cross sections,”
Lin Pan and D. R. Beck, submitted to J. Phys. B.
“Valence calculations of actinide anion binding energies: all bound 7p and 7s attachments,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 80, 032514 (2009).
“Valence calculations of lanthanide anion binding energies: 6p and 6s attachments to 4fm(5d+6s+6p)3 thresholds,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 79, 012511 (2009).
“X-ray absorption near-edge structure of laser-dressed neon,”
Hari R. Varma, Lin Pan, Donald R. Beck, and Robin Santra, Phys. Rev. A 78, 065401 (2008).
“Improved RCI techniques for treating 4fn atoms and ions: application to Gd IV energies,”
Donald R. Beck and Eric Domeier, Can. J. Phys. 87, 75 (2009).
“Valence calculations of lanthanide anion binding energies: 6p attachments to 4fn6s2 thresholds,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 78, 012510 (2008).
“Calculations of Nd− binding energies and photodetachment partial cross sections,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 77, 012505 (2008).
“Relativistic configuration interaction Fe III 3d6 J=4 → 3d54p J=3, 4, 5 f values,”
Donald R. Beck, J. Phys. B 40, 3505 (2007).
“Ab initio electric dipole f values for Fe II (3d+4s)7 J=9/2 → (3d+4s)64p J=11/2 transitions,”
Donald R. Beck, J. Phys. B 40, 651 (2007).
“The 1s photoabsorption transitions in Br I and Br II,”
Lin Pan and Donald R. Beck, J. Phys. B 39, 4581 (2006).
“Calculation of Ce− binding energies by analysis of photodetachment partial cross sections,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 74, 042509 (2006).
“Mo VI J=3/2, 5/2 energy levels, oscillator strengths and Landé g values,”
Lin Pan and Donald R. Beck, Phys. Scr. 73, 607 (2006).
“Removal or excitation of a 1s electron in Kr II and Kr III,”
Lin Pan, Donald R. Beck, and Steven M. O’Malley, J. Phys. B 38, 3721 (2005).
“Autodetachment lifetime calculations of long lived metastable states of Ba− and Eu−,”
Steven M. O’Malley and Donald R. Beck, J. Phys. B. 38, 2645 (2005).
“Ab initio electric dipole f values for Fe II 3d64s + 3d7 J=9/2 → 3d64p J=9/2 transitions,”
Donald R. Beck, Phys. Scr. 71, 447 (2005).
“Three long lived excited states of Tm−,”
Steven M. O’Malley and Donald R. Beck, Phys. Rev. A 70, 022502 (2004).
“Mo V J=0, 1 energy levels, oscillator strengths, and Landé g values,”
Lin Pan and Donald R. Beck, Physica Scripta 70, 257 (2004).
“Relativistic configuration interaction calculations of lifetimes of Si− bound excited states,”
Steven M. O’Malley and Donald R. Beck, J. Phys. B 36, 4301 (2003).
“Ab initio energy levels, oscillator strengths, and Landé g values for J=0, 1 states of Zr III and Nb IV,”
Donald R. Beck and Lin Pan, Phys. Scr. 69, 91 (2004).
“Lifetimes of Tc I (4d+5s)65p and 4d65s 6D states,”
S. M. O’Malley and D. R. Beck, Phys. Scr. 68, 244 (2003).
“Oscillator strengths for K II 3p6 → 3p5(4s+3d) J=1 transitions,”
D. R. Beck, J. Phys. B, 35, 4155 (2002).
“Magnetic quadrupole lifetimes of np5(n+1)s J=2 states of rare gases,”
D. R. Beck, Phys. Rev. A 66, 034502 (2002).
“Binding energies of 4d65s2 states in Tc−,”
S. M. O’Malley and D. R. Beck, Phys. Rev. A 65, 064502 (2002).
“Important correlation effects for the Er3+ 4f11 4S3/2 → 4I15/2 laser transition energy,”
D. R. Beck, Int. J. Quant. Chem. 90, 439 (2002).
“Ab initio electron affinities of AlH, SiH, GaH, GeH, including characterization of bound excited states of SiH and GeH,”
D. E. Woon and D. R. Beck, Chem. Phys. Lett. 347, 255 (2001).
“Ab initio lifetimes, Landé g values, and hyperfine structure for Ta II states,”
P. L. Norquist and D. R. Beck, J. Phys. B 34, 2107 (2001).
“Oscillator strengths, Landé g values, and hyperfine structure for 3d4 J=0 → 3d34p J=1 transitions in Fe V,”
S. M. O’Malley, D. R. Beck, and D. P. Oros, Phys. Rev. A 63, 032501 (2001).
“Relativistic configuration interaction calculations of electron affinities for three bound states of Lu− formed by 6p attachment,”
S. M. O’Malley and D. R. Beck, J. Phys. B 33, 4337 (2000).
“Electron affinities and E1 f values for 15 bound states of Ce− formed by 6p and 5d attachment,”
S. M. O’Malley and D. R. Beck, Phys. Rev. A 61, 034501 (2000).
“Lifetimes of 3s3p2 J=1/2, 5/2 levels in Au66+ and Br22+,”
D. R. Beck and P. L. Norquist, Phys. Rev. A 61, 044504 (2000).
“Binding energies, hyperfine structure, and M1 decay rates for Os− 5d76s2 4F levels,”
P. L. Norquist and D. R. Beck, Phys. Rev. A 61, 014501 (2000).
“Energy differences and magnetic dipole decay rates for the W52+ and Bi61+ members of the nearly Z independent (3d3/2)33d5/2 J=3 → J=2 transition,”
D. R. Beck, Phys. Rev. A 60, 3304 (1999).
“Electron affinities and E1 f values for 11 bound states of La− formed by 6p and 5d attachment,”
S. M. O’Malley and D. R. Beck, Phys. Rev. A 60, 2558 (1999).
“Theoretical and experimental binding energies for the d7s2 4F levels in Ru−, including calculated hyperfine structure and M1 decay rates,”
P. L. Norquist, D. R. Beck, R. C. Bilodeau, M. Scheer, R. A. Srawley, and H. K. Haugen, Phys. Rev. A 59, 1896 (1999).
“Theoretical lifetimes and Landé g values of Cs II 5p56p levels,”
D. R. Beck, Phys. Rev. A 57, 4240 (1998).
“Relativistic many-body calculations for the oscillator strengths of the resonance lines of neon, argon, krypton, and xenon,”
E. N. Avgoustoglou and D. R. Beck, Phys. Rev. A 57, 4286 (1998).
“Electron affinities, magnetic dipole decay rates, and hyperfine structure for the excited states of 5p3 Sn−,”
S. M. O’Malley and D. R. Beck, Phys. Rev. A 57, 1743 (1998).
“Single- and multi-photon infrared laser spectroscopy of Sb−: a case study,”
M. Scheer, H. K. Haugen, and D. R. Beck, Phys. Rev. Lett. 79, 4104 (1997).
“Relativistic configuration interaction results for Xe32+, Ba34+, Nd38+, and Gd42+ 5D J=2 to J=3 energy differences,”
D. R. Beck, Phys. Rev. A 56, 2428 (1997).
“Hyperfine structure constants of (d+s)3 states in La I and the Zr II and Hf II isoelectronic sequences,”
D. R. Beck, Int. J. Quant. Chem. 65, 555 (1997).
“All-order relativistic many body calculations for the electron affinities of Ca−, Sr−, Ba−, and Yb− negative ions,”
E. N. Avgoustoglou and D. R. Beck, Phys. Rev. A 55, 4143 (1997).
“Relativistic configuration interaction results for hyperfine structure constants of 133Cs II and 137Ba III 5p5(5d+6s+6p) levels,”
S. M. O’Malley and D. R. Beck, Phys. Rev. A 54, 3894 (1996).
“Electron affinity and hyperfine structure of Pa−: 7p attachment,”
K. Dinov and D. R. Beck, Phys. Rev. A 53, 4031 (1996).
“Relativistic many-body effects in the fine and hyperfine structure of La II (5d+6s)2 states: the need for second order electrostatic corrections,”
D. Datta and D. R. Beck, Phys. Rev. A 52, 3622 (1995).
“Electron affinities and hyperfine structure for U− and U I obtained from relativistic configuration interaction calculations,”
K. Dinov and D. R. Beck, Phys. Rev. A 52, 2632 (1995).
“Theoretical lifetimes of Nb II z 4d35p 5G3 and 3D3 levels,”
D. R. Beck and D. Datta, Phys. Rev. A 52, 2436 (1995).
“Hyperfine structure studies of Nb II: experimental and relativistic configuration interaction results,”
L. Young, S. Hasegawa, C. Kurtz, D. Datta, and D. R. Beck, Phys. Rev. A 51, 3534 (1995).
“Electron affinities of 6p electrons in Pr−,”
K. Dinov and D. R. Beck, Phys. Rev. A 51, 1680 (1995).
“Electron affinities of opposite parity bound states in Th−: relativistic configuration interaction studies,”
D. Datta and D. R. Beck, Phys. Rev. A 50, 1107 (1994).
“Electron affinities of six bound states of Ce− formed by attachment of 6p and 5d electrons to Ce,”
K. Dinov, D. R. Beck, and D. Datta, Phys. Rev. A 50, 1144 (1994).
“Multi-reference relativistic configuration interaction calculations for (d+s)n transition metal atomic states: application to Zr II hyperfine structure,”
D. R. Beck and D. Datta, Phys. Rev. A 48, 182 (1993).
“Hyperfine studies in Zr II: experiment and relativistic configuration interaction results,”
L. Young, C. A. Kurtz, D. R. Beck, and D. Datta, Phys. Rev. A 48, 173 (1993).
“Possibility of formation of rare-earth negative ions by attachment of f electrons to the atomic ground state,”
D. Datta and D. R. Beck, Phys. Rev. A 47, 5198 (1993).
“Laser-rf double resonance measurements of the hyperfine structure of 49Ti II,”
N. Berrah-Mansour, C. Kurtz, L. Young, D. R. Beck, and D. Datta, Phys. Rev. A 46, 5774 (1992).
“Hyperfine structure constants for Ti I 3d24s2 3P,”
D. R. Beck, Phys. Rev. A 45, 5251 (1992).
“Magnetic dipole hyperfine structure constants for the nd2 triplet states of Sc II and Y II,”
D. R. Beck, Phys. Rev. A 45, 1399 (1992).
“Numerical calculation of relativistic atomic continuum wavefunctions in a frozen core Dirac-Fock potential: application to the 6p2 resonances of Hg I,”
W. F. Perger, Z. Cai, and D. R. Beck, J. Phys. B. 24, 4863 (1991).
“Relativistic many body results for the hyperfine structure of the ground state of the Ag I isoelectronic sequence,”
D. R. Beck and D. Datta, Phys. Rev. A 44, 758 (1991).
“Obtaining accurate pressure second virial coefficients for methane from an ab initio pair potential,”
D. H. Gay, H. Dai, and D. R. Beck, J. Chem. Phys. 95, 9106 (1991).
“Ab initio relativistic many body calculations for the Hg 6p2 resonances,”
Z. Cai, D. R. Beck, and W. F. Perger, Phys. Rev. A 43, 4660 (1991).
“Coupled Hartree-Fock dipole polarizabilities of the smaller n-alkanes (n < 8),”
D. R. Beck and D. H. Gay, J. Chem. Phys. 93, 7264 (1990).
“Potential surfaces for CH4-H2O and CH4-H2S,”
D. E. Woon, P. Zeng, and D. R. Beck, J. Chem. Phys. 93, 7808 (1990).
“A relativistic many body methodology of electric dipole oscillator strengths with application to Tl+ 6s2 → 6s6p,”
D. R. Beck and Z. Cai, Phys. Rev. A 41, 301 (1990).
“Wavelengths, oscillator strengths, and fine structure for the lowest lying quintet states of Mg I,”
D. R. Beck and Z. Cai, Phys. Lett. A1 42, 378 (1989).
“Potential interactions in hydrogen sulfide, including third order MBPT effects,”
D. E. Woon and D. R. Beck, J. Chem. Phys. 92, 3605 (1990).
“Bound excited states of atomic negative ions,”
C. A. Nicolaides, G. Aspromallis, and D. R. Beck, J. Mol. Struct. 199, 283 (1989).
“Wavelength, oscillator strengths, and fine structure for the Mg− 4P → 4So transition,”
D. R. Beck, Phys. Rev. A 40, 2887 (1989).
“Bound excited states of Cr−, Fe−, Co−, and Ni−,”
Z. Cai and D. R. Beck, Phys. Rev. A 40, 1657 (1989).
“Two electron jump electric dipole oscillator strengths in La48+ and La49+,”
D. R. Beck and G. A. Aspromallis, Phys. Rev. A 38, 5925 (1988).
“Bound states of Mn−,”
D. R. Beck and Z. Cai, Phys. Rev. A 37, 4481 (1988).
“Relativistic and many body effects in first row transition metal negative ions: three Zn− bound states,”
D. R. Beck, Phys. Rev. A 37, 1847 (1988).
“Possible role of charged defects in molecular solids,”
A. B. Kunz and D. R. Beck, Phys. Rev. B 36, 7580 (1987).
“Electron affinities of states of Sc and Cu,”
D. R. Beck, Z. Cai, and G. A. Aspromallis, Int. J. Quant. Chem. Supp. 21, 457 (1987).
“Theory of KLL Auger energies: application to the alkaline earths,”
D. R. Beck and C. A. Nicolaides, Phys. Rev. A 33, 3885 (1986).
“Relativistic autoionization of bound states of negative ions, I:Be,”
G. A. Aspromallis, C. A. Nicolaides, and D. R. Beck, J. Phys. B 19, 1713 (1986).
“K-shell binding energy of Mg and Ca,”
D. R. Beck, J. Chem. Phys. 81, 5002 (1984).
“The three lowest bound states of Mg−,”
D. R. Beck, Phys. Rev. A 30, 3305 (1984).
“Fine and hyperfine structure of the two lowest bound states of Be− and their first two ionization thresholds,”
D. R. Beck and C. A. Nicolaides, Int. J. Quant. Chem. Supp. 16, 467 (1984).
“Fine and hyperfine structure of the Li− spectrum,”
K. T. Cheng, J. E. Hardis, E. J. Dehm, and D. R. Beck, Phys. Rev. A 30, 698 (1984).
“Excitation energies for the lowest triplets and singlet-triplet splittings in gas phase methane including many body effects,”
D. R. Beck and A. B. Kunz, J. Phys. B 17, 2159 (1984).
“Electric quadrupole transition probabilities for the lowest 1D metastable state in Ca and Sr,”
D. R. Beck and C. A. Nicolaides, J. Phys. B 16, L627 (1983).
“Probabilities for transition processes crucial to Li lasers,”
G. Aspromallis, C. A. Nicolaides, and D. R. Beck, Phys. Rev. A 28, 1879 (1983).
“Lifetimes and hyperfine structure of Li− excited states,”
D. R. Beck and C. A. Nicolaides, Phys. Rev. A 28, 3112 (1983).
“Atomic and molecular 2p binding energies of P, As, and Se from many-body calculations and x-ray photoelectron spectroscopy,”
D. R. Beck, R. J. Key, A. R. Slaughter, R. D. Mathews, and M. S. Banna, Phys. Rev. A. 28, 2634 (1983).
“The K-shell binding energy of Be and its fluorescence yield,”
C. A. Nicolaides, Y. Komninos, and D. R. Beck, Phys. Rev. A 27, 3044 (1983).
“A new bound state of the negative B ion,”
D. R. Beck, Phys. Rev. A 27, 1197 (1983).
“An experimental and theoretical study of the 3P3/2 level of atomic cesium: beyond the one-electron picture,”
A. R. Sargent, R. D. Mathews, R. S. Key, M. J. Banna, and D. R. Beck, J. Chem. Phys. 77, 1690 (1982).
“On the spectrum of negative ions and the charge density of the ground state of neutral neon,”
D. R. Beck, Int. J. Quant. Chem. Supp. 16, 345 (1982).
“Specific correlation effects in inner electron photoelectron spectroscopy,”
D. R. Beck and C. A. Nicolaides, Phys. Rev. A 26, 857 (1982).
“Many electron theory of discrete-discrete and discrete-continuum transition rates for systems with symmetry,”
C. A. Nicolaides, Y. Komninos, and D. R. Beck, Chimica Chronika (Greece), New Series 10, 35 (1981).
“The spectrum of the negative Be ion,”
D. R. Beck, C. A. Nicolaides, and G. Aspromallis, Phys. Rev. A 24, 3252 (1981).
“On the incorporation of local correlation effects into ionic solids,”
D. R. Beck, Int. J. Quant. Chem. Supp. 15, 521 (1981).
“Bound states and decay mechanisms of He−,”
C. A. Nicolaides, Y. Komninos, and D. R. Beck, Phys. Rev. A 24, 1103 (1981).
“Many electron effects in and operator forms for electron quadrupole transition probabilities,”
D. R. Beck, Phys. Rev. A 23, 159 (1981).
“On the theoretical interpretation and calculation of inner photoemission spectra in atoms and solids,”
D. R. Beck and C. A. Nicolaides, Int. J. Quant. Chem. Supp. 14, 323 (1980).
“One electron binding and Auger energies of sulfur in atomic and molecular states,”
D. R. Beck, G. Theodorakopoulos, and C. A. Nicolaides, Int. J. Quant. Chem. Supp. 13, 671 (1979).
“Many body theory of photoabsorption,”
C. A. Nicolaides and D. R. Beck
“Theory of atomic and molecular non-stationary states within the coordinate rotation method,”
C. A. Nicolaides and D. R. Beck
“Theory of the electronic structure of excited states in small systems with numerical applications to atomic states,”
D. R. Beck and C. A. Nicolaides
“Theory of one electron binding energies including correlation, relativistic and radiative effects: application to free atoms and metals,”
D. R. Beck and C. A. Nicolaides
in Proceedings of an Advanced Study Institute on “Excited States in Quantum Chemistry”, co-editors C. A. Nicolaides and D. R. Beck, (D. Reidel, 1979).
“Configuration interaction methods for improving unrestricted Hartree-Fock spin-densities,”
A. T. Amos, D. R. Beck, and I. L. Cooper, Theor. Chim. Acta 52, 329 (1979).
“How many bound states do H− and H− − have?”
D. R. Beck and C. A. Nicolaides, Chem. Phys. Lett. 59, 525 (1978).
“Methods for improving spin densities obtained from unrestricted Hartree-Fock wavefunctions,”
A. T. Amos, D. R. Beck, and I. L. Cooper, Chem. Phys. Lett. 56, 95 (1978).
“Time dependence, complex scaling, and the calculation of resonances in many electron systems,”
C. A. Nicolaides and D. R. Beck, Int. J. Quant. Chem. Supp. XIV, 457 (1978).
“Comment on the lifetime of the Li 1s2p2 2P state: how probable is radiative autoionization?”
C. A. Nicolaides and D. R. Beck, Phys. Rev. A 17, 2116 (1978).
“Comment on the Luken-Sinanoglu paper ‘Theory of atomic structures including electron correlation V. Excited states not lowest of their symmetry and oscillator strengths in neutral and singly ionized atoms’,”
C. A. Nicolaides and D. R. Beck, Phys. Rev. A 18, 1307 (1978).
“The variational calculation of energies and widths of resonances,”
C. A. Nicolaides and D. R. Beck, Phys. Lett. 65A, 11 (1978).
“Transition probabilities for the photo-excitation of Mg and Zn-like molybdenum ions,”
D. R. Beck and C. A. Nicolaides, Phys. Lett. 65A, 293 (1978).
“Transfer of oscillator strength in regions of avoided crossing II: atomic spectra for non-integer values of Z. Application to the N I 4S → 4P sequence,”
D. R. Beck and C. A. Nicolaides, Chem. Phys. Lett. 53, 91 (1978).
“Transfer of oscillator strength in regions of (avoided) crossing I: the two state approximation,”
C. A. Nicolaides and D. R. Beck, Chem. Phys. Lett. 53, 87 (1978).
“On the calculation of induced electric and magnetic moments of atoms and molecules,”
D. R. Beck and C. A. Nicolaides, Chem. Phys. Lett. 48, 135 (1977).
“Lower bounds to static polarizabilities,”
D. R. Beck and C. A. Nicolaides, Chem. Phys. Lett. 49, 357 (1977).
“High spin and mixed states in B I and B II,”
D. R. Beck and C. A. Nicolaides, Phys. Lett. 61A, 227 (1977).
“A variational method for calculating the energies and widths of resonances,”
C. A. Nicolaides and D. R. Beck, Phys. Lett. 60A, 92 (1977).
“On the possibility of observing non-exponential decays in autoionizing states,”
C. A. Nicolaides and D. R. Beck, Phys. Rev. Lett. 38, 683 (1977).
“Comment on the mean-square deviation formula for autoionizing states,”
C. A. Nicolaides and D. R. Beck, Phys. Rev. A 15, 1787 (1977).
“Electronic structure and oscillator strengths of highly excited states: resonances in He, Li, and Be,”
C. A. Nicolaides and D. R. Beck, J. Chem. Phys. 66, 1982 (1977).
“On collective excitations in atoms and molecules,”
C. A. Nicolaides and D. R. Beck, J. Phys. B 9, L259 (1976).
“Theory and calculation of excited state wavefunctions and properties,”
D. R. Beck and C. A. Nicolaides, Intl. J. Quant. Chem. Supp. 10, 119 (1976).
“Theoretical lifetimes of the N II 2s2p3 and 2s22p3s 1Po states obtained by applying FOTOS,”
D. R. Beck and C. A. Nicolaides, Phys. Lett. 56A, 265 (1976).
“On the possibility of observing non-exponential decays in autoionizing states,”
C. A. Nicolaides and D. R. Beck
“Anomalies in the fine and hyperfine structure of alkali isoelectronic sequences,”
D. R. Beck and C. A. Nicolaides
“Oscillator strengths in N, N+, O, O+ obtained from the first order theory of oscillator strengths,”
D. R. Beck and C. A. Nicolaides
in Proceedings of the 4th International Conference on Beam Foil Spectroscopy, Vol. 1, editors I. Sellin and D. Pegg (Plenum Press, 1976).
“Absorption oscillator strengths to autoionizing states in Li, N and F and their isoelectronic sequences,”
C. A. Nicolaides and D. R. Beck, Canad. J. Phys. 54, 689 (1976).
“Theoretical oscillator strengths for N I and O I resonance transitions,”
D. R. Beck and C. A. Nicolaides, J. Quant. Spectrosc. Radiat. Transfer 16, 297 (1976).
“Inner electron binding energies and Auger energies in free atoms for use in x-ray spectroscopy,”
D. R. Beck and C. A. Nicolaides, J. Electron Spectrosc. 8, 249 (1976).
“Approach to the calculation of the important many-body effects of photoabsorption oscillator strengths,”
C. A. Nicolaides and D. R. Beck, Chem. Phys. Lett. 36, 79 (1975).
“Excitation of atomic oxygen by fast electrons: generalized and optical oscillator strengths,”
D. R. Beck and C. A. Nicolaides, Proceedings of the 4th International Conference of Atomic Physics, 171 (1974).
“On the length, velocity and acceleration expressions for the calculation of accurate oscillator strengths in many electron systems,”
C. A. Nicolaides and D. R. Beck, Chem. Phys. Lett. 35, 202 (1975).
“A comment of the effect of non-orthonormality on atomic transition probabilities,”
C. A. Nicolaides and D. R. Beck, Can. J. Phys. 53, 1224 (1975).
“Crucial role of electron correlation in both the upper and lower states in optical transitions,”
O. Sinanoglu and D. R. Beck, Theor. Chim. Acta (Berlin) 34, 183 (1974).
“Calculation of the fine structure of the 3Σ+ u state of molecular helium,”
D. R. Beck, C. A. Nicolaides, and J. I. Musher, Phys. Rev. A 10, 1522 (1974).
“The effect of electron correlation on atomic properties,”
D. R. Beck and C. A. Nicolaides, Intl. J. Quant. Chem. Supp. 8, 17 (1974).
“On the theory of KLL Auger energies,”
C. A. Nicolaides and D. R. Beck, Chem. Phys. Lett. 27, 269 (1974).
“Transition probabilities for the Si I 3s23p2 3P → 3s3p3 3Do isoelectronic sequence, including the important correlation effects,”
O. Sinanoglu and D. R. Beck, Chem. Phys. Lett. 24, 20 (1974).
“Electronic quadrupole moments of excited states and the charge wave function of the many electron theory,”
O. Sinanoglu and D. R. Beck, Chem. Phys. Lett. 21, 247 (1973).
“Hyperfine structure constants of Be I 2s2p 3Po, B I 2s2p2 4P, and B I 2s2p2 2D obtained from the non-closed many electron theory for excited states,”
O. Sinanoglu and D. R. Beck, Chem. Phys. Lett. 20, 221 (1973).
“Variational calculations of correlated wave functions and energies for ground, low-lying, as well as highly excited states in many electron atoms, using a new atomic structure theory, including electron correlation,”
C. A. Nicolaides and D. R. Beck, J. Phys. B 6, 535 (1973).
“Theoretical oscillator strengths for the beryllium 1s22s2 1S → 1s22s2p 1Po, 1s22s2p 1Po → 1s22p2 1D, and 1s22s2p 1Po → 1s22p2 1S isoelectronic sequences,”
C. A. Nicolaides, D. R. Beck, and O. Sinanoglu, J. Phys. B 6, 62 (1973).
“C.I. methods for the calculation of hyperfine structure, lifetimes, and molecular potential energy surfaces,”
D. R. Beck, C. A. Nicolaides, W. Luken, and O. Sinanoglu, Intl. J. Quant. Chem. Supp. 6, 1 (1972).
“Resonance transition probabilities for third row atoms and ions (Mg I, Si II-III, P II, P IV, S II-III, Cl III). Including the important correlation effects,”
D. R. Beck and O. Sinanoglu, Phys. Rev. Lett. 28, 945 (1972).
“Relativistic and correlation effects for bound levels of atomic systems with three electrons,”
D. R. Beck and H. Odabasi, Ann. of Phys. (N.Y.) 67, 274 (1971).
“Relativistic and non-relativistic configuration interaction calculations for atoms having a closed core and two valence spin-orbitals,”
D. R. Beck and R. N. Zare, Comp. Phys. Commun. 1, 113 (1969).
“Relativistic and correlation effects for optical levels of large atomic systems: application to Tl II,”
D. R. Beck, J. Chem. Phys. 51, 2171 (1969).

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The Beck research group gratefully acknowledges current funding by the National Science Foundation (1981 to present) and prior funding from the Department of Energy (1992 to 2007). Any opinions, findings, and conclusions or recommendations expressed on this website are those of the Beck research group and do not necessarily reflect the views of NSF or DOE.