19901999

P. Piecuch,
"Spherical Tensor Theory of LongRange Interactions in a System of N Arbitrary Molecules Including QuantumMechanical
ManyBody Effects. V. FourthOrder Induction Forces and Scalar Angular Functions for ManyBody Interactions,"
Acta Phys. Pol. A 77, 453484 (1990).

P. Piecuch and J. Paldus,
"Coupled Cluster Approaches with an Approximate Account of Triexcitations and the Optimized Inner Projection Technique.
I. General Orthogonally SpinAdapted Formalism,"
Theor. Chim. Acta 78, 65128 (1990).

P. Piecuch, S. Zarrabian, J. Paldus, and J. Čížek,
"CoupledCluster Approaches with an Approximate Account of Triexcitations and the OptimizedInnerProjection Technique.
II. CoupledCluster Results for CyclicPolyene Model Systems,"
Phys. Rev. B 42, 33513379 (1990).

P. Piecuch, S. Zarrabian, J. Paldus, and J. Čížek,
"CoupledCluster Approaches with an Approximate Account of Triexcitations and the OptimizedInnerProjection Technique.
III. Lower Bounds to the GroundState Correlation Energy of CyclicPolyene Model Systems,"
Phys. Rev. A 42, 51555167 (1990).

K. Jankowski, J. Paldus, and P. Piecuch,
"Method of Moments Approach and Coupled Cluster Theory,"
Theor. Chim. Acta 80, 223243 (1991).

P. Piecuch and J. Paldus,
"On the Solution of CoupledCluster Equations in the Fully Correlated Limit of Cyclic Polyene Model,"
Int. J. Quantum Chem.: Quantum Chem. Symp. 25, 934 (1991) or
Int. J. Quantum Chem. 40, Issue Supplement S25, 934 (1991).

J. Paldus and P. Piecuch,
"Electron Correlation in One Dimension: Coupled Cluster Approaches to Cyclic Polyene πElectron Models,"
Int. J. Quantum Chem. 42, 135164 (1992)
[invited paper in a special issue devoted to "HartreeFockBased Correlation Treatments of Extended Systems"].

P. Piecuch, J. Čížek, and J. Paldus,
"Behavior of Coupled Cluster Energy in the Strongly Correlated Limit of the Cyclic Polyene Model. Comparison with the Exact Results,"
Int. J. Quantum Chem. 42, 165191 (1992)
[invited paper in a special issue devoted to "HartreeFockBased Correlation Treatments of Extended Systems"].

P. Piecuch and J. Paldus,
"Orthogonally SpinAdapted MultiReference Hilbert Space CoupledCluster Formalism: Diagrammatic Formulation,"
Theor. Chim. Acta 83, 69103 (1992) [invited paper in the Klaus Ruedenberg honorary issue].

J. Paldus, P. Piecuch, L. Pylypow, and B. Jeziorski,
"Application of HilbertSpace CoupledCluster Theory to Simple (H_{2})_{2} Model Systems: Planar Models,"
Phys. Rev. A 47, 27382782 (1993).

P. Piecuch,
"MAPLE Symbolic Computation of the LongRange ManyBody Intermolecular Potentials. ThreeBody Induction Forces between Two Atoms and a Linear Molecule,"
Int. J. Quantum Chem. 47, 261305 (1993).

P. Piecuch, R. Toboła, and J. Paldus,
"Approximate Account of Connected Quadruply Excited Clusters in MultiReference Hilbert Space CoupledCluster Theory.
Application to Planar H_{4} Models,"
Chem. Phys. Lett. 210, 243252 (1993).

P. Piecuch, N. Oliphant, and L. Adamowicz,
"A StateSelective MultiReference CoupledCluster Theory Employing the SingleReference Formalism,"
J. Chem. Phys. 99, 18751900 (1993).

M.M. Szczęśniak, G. Chałasiński, and P. Piecuch,
"The Nonadditive Interactions in the Ar_{2}HF and Ar_{2}HCl Clusters: An Ab Initio Study,"
J. Chem. Phys. 99, 67326741 (1993).

P. Piecuch and J. Paldus,
"Application of HilbertSpace CoupledCluster Theory to Simple (H_{2})_{2} Model Systems. II. NonPlanar Models,"
Phys. Rev. A 49, 34793514 (1994).

P. Piecuch and L. Adamowicz,
"StateSelective Multireference CoupledCluster Theory Employing the SingleReference Formalism:
Implementation and Application to the H_{8} Model System,"
J. Chem. Phys. 100, 57925809 (1994).

P. Piecuch and L. Adamowicz,
"Solving the SingleReference CoupledCluster Equations Involving Highly Excited Clusters in Quasidegenerate Situations,"
J. Chem. Phys. 100, 58575869 (1994).

P. Piecuch and L. Adamowicz,
"StateSelective MultiReference CoupledCluster Theory Using MultiConfiguration SelfConsistentField Orbitals. A Model Study on H_{8},"
Chem. Phys. Lett. 221, 121128 (1994).

X. Li, P. Piecuch, and J. Paldus,
"A Study of ^{1}A_{1}^{3}B_{1} Separation in CH_{2} Using
Orthogonally SpinAdapted StateUniversal and StateSpecific CoupledCluster Methods,"
Chem. Phys. Lett. 224, 267274 (1994).

P. Piecuch and J. Paldus,
"Orthogonally SpinAdapted StateUniversal CoupledCluster Formalism: Implementation of the Complete TwoReference Theory Including Cubic and Quartic Coupling Terms,"
J. Chem. Phys. 101, 58755890 (1994).

P. Piecuch, X. Li, and J. Paldus,
"An Ab Initio Determination of ^{1}A_{1}^{3}B_{1} Energy Gap in CH_{2} Using Orthogonally SpinAdapted
StateUniversal and StateSpecific CoupledCluster Methods,"
Chem. Phys. Lett. 230, 377386 (1994).

P. Piecuch and L. Adamowicz,
"Breaking Bonds with the StateSelective Multireference CoupledCluster Method Employing the SingleReference Formalism,"
J. Chem. Phys. 102, 898904 (1995).

V. Alexandrov, P. Piecuch, and L. Adamowicz,
"StateSelective MultiReference CoupledCluster Theory Employing the SingleReference Formalism: Application to an Excited State of H_{8},"
J. Chem. Phys. 102, 33013306 (1995).

P. Piecuch, R. Toboła, and J. Paldus,
"CoupledCluster Approaches with an Approximate Account of Triply and Quadruply Excited Clusters: Implementation of the Orthogonally
SpinAdapted CCD+ST(CCD), CCSD+T(CCSD), and ACPQ+ST(ACPQ) Formalisms,"
Int. J. Quantum Chem. 55, 133146 (1995).

A.E. Kondo, P. Piecuch, and J. Paldus,
"Orthogonally SpinAdapted SingleReference CoupledCluster Formalism: Linear Response Calculation of Static Properties,"
J. Chem. Phys. 102, 65116524 (1995).

P. Piecuch and J. Paldus,
"Property Evaluation Using the TwoReference StateUniversal CoupledCluster Method,"
J. Phys. Chem. 99, 1535415368 (1995)
[invited contribution, Zdenek Herman Festschrift].

K.B. Ghose, P. Piecuch, and L. Adamowicz,
"Improved Computational Strategy for the StateSelective CoupledCluster Theory with Semiinternal Triexcited Clusters: Potential Energy Surface of the HF Molecule,"
J. Chem. Phys. 103, 93319346 (1995).

P. Piecuch, A.E. Kondo, V. Špirko, and J. Paldus,
"Molecular Quadrupole Moment Functions of HF and N_{2}. I. Ab Initio LinearResponse CoupledCluster Results,"
J. Chem. Phys. 104, 46994715 (1996).

V. Špirko, P. Piecuch, A.E. Kondo, and J. Paldus,
"Molecular Quadrupole Moment Functions of HF and N_{2}. II. Rovibrational Effects,"
J. Chem. Phys. 104, 47164727 (1996).

K.B. Ghose, P. Piecuch, S. Pal, and L. Adamowicz,
"StateSelective Multireference CoupledCluster Theory: In Pursuit of Property Calculation,"
J. Chem. Phys. 104, 65826589 (1996).

A.E. Kondo, P. Piecuch, and J. Paldus,
"Orthogonally SpinAdapted SingleReference CoupledCluster Formalism: Linear Response Calculation of HigherOrder Static Properties,"
J. Chem. Phys. 104, 85668585 (1996).

P. Piecuch, R. Toboła, and J. Paldus,
"Approximate Account of Connected Quadruply Excited Clusters in SingleReference CoupledCluster Theory via Cluster Analysis of the Projected Unrestricted HartreeFock Wave Function,"
Phys. Rev. A 54, 12101241 (1996).

P. Piecuch, V. Špirko, and J. Paldus,
"Molecular Quadrupole Moment Function of Ammonia,"
J. Chem. Phys. 105, 1106811074 (1996).

P. Piecuch and J. Paldus,
"The Convergence of Energy Expansions for Molecules in Electrostatic Fields: A LinearResponse CoupledCluster Study,"
J. Math. Chem. 21, 5170 (1997).

P. Piecuch,
"Potential Energy Curves for the HF^{} and CH_{3}F^{} Anions: A Coupled Cluster Study,"
J. Mol. Struct. 436437, 503536 (1997)
[invited contribution in a special issue in honor of Professor Henryk Ratajczak entitled "Structure, Properties, and Dynamics
of Molecular Systems," edited by A.J. Barnes and Z. Latajka].

X.Y. Chang, R. Ehlich, A.J. Hudson, P. Piecuch, and J.C. Polanyi,
"Dynamics of Harpooning Studied by Transition State Spectroscopy. Na...FH,"
Faraday Discuss. 108, 411425 (1997)
[in response to an invitation issued to J.C. Polanyi].

X.Y. Chang, A.J. Hudson, P. Piecuch, and J.C. Polanyi,
"Communication on REMPI TwoPhoton Ionization Experiment for NaF,"
included in General Discussion published as
Faraday Discuss. 108, 427467 (1997); see the communication by A.J. Hudson and J.C. Polanyi on pp. 463464.

P. Piecuch, V. Špirko, A.E. Kondo, and J. Paldus,
"Vibrational Dependence of the Dipole Moment and Radiative Transition Probabilities in the X^{1}∑^{+}
State of HF: A LinearResponse CoupledCluster Study,"
Mol. Phys. 94, 5564 (1998) [invited contribution; in response to an invitation issued to P. Piecuch].

L. Adamowicz, P. Piecuch, and K.B. Ghose,
"The StateSelective Coupled Cluster Method for Quasidegenerate Electronic States,"
Mol. Phys. 94, 225234 (1998) [invited contribution; in response to an invitation issued to L. Adamowicz].

P. Piecuch, V. Špirko, and J. Paldus,
"Dipole Moment and Polarizability Functions of Ammonia: A LinearResponse CoupledCluster Study,"
Pol. J. Chem. 72 (7S), 16351656 (1998) [invited contribution in a special issue dedicated to late Włodzimierz Kołos;
edited by B. Jeziorski and L. Piela; in response to an invitation issued to P. Piecuch].

M.S. Topaler, D.G. Truhlar, X.Y. Chang, P. Piecuch, and J.C. Polanyi,
"Potential Energy Surfaces of NaFH,"
J. Chem. Phys. 108, 53495377 (1998).

M.S. Topaler, D.G. Truhlar, X.Y. Chang, P. Piecuch, and J.C. Polanyi,
"The Photoabsorption Spectrum of Na...FH van der Waals Molecule: Comparison of Theory and Experiment for a
Harpooning Reaction Studied by Transition State Spectroscopy,"
J. Chem. Phys. 108, 53785390 (1998).

P. Piecuch, S.A. Kucharski, and R.J. Bartlett,
"CoupledCluster Methods with Internal and SemiInternal Triply and Quadruply Excited Clusters: CCSDt and CCSDtq Approaches,"
J. Chem. Phys. 110, 61036122 (1999).

M.S. Topaler, P. Piecuch, and D.G. Truhlar,
"Infrared Absorption Line Strengths of the Na...FH van der Waals Molecule,"
J. Chem. Phys. 110, 56345638 (1999).

P. Piecuch, S.A. Kucharski, and V. Špirko,
"CoupledCluster Methods with Internal and SemiInternal Triply Excited Clusters: Vibrational Spectrum of the HF Molecule,"
J. Chem. Phys. 111, 66796692 (1999).