Two-photon photoassociation of hot magnesium atoms by femtosecond laser pulses, creating electronically excited magnesium dimer molecules, is studied from first principles, combining ab initio quantum chemistry and molecular quantum dynamics. This theoretical framework allows for rationalizing the generation of molecular rovibrational coherence from thermally hot atoms [L. Rybak et al., Phys. Rev. Lett. 107, 273001 (2011)]. Random phase thermal wave functions are employed to model the thermal ensemble of hot colliding atoms. Comparing two different choices of basis functions, random phase wavefunctions built from eigenstates are found to have the fastest convergence for the photoassociation yield. The interaction of the colliding atoms with a femtosecond laser pulse is modeled non-perturbatively to account for strong-field effects.

A Ramsey-type interferometer is suggested, employing a cold trapped ion and two time-delayed offresonant femtosecond laser pulses. The laser light couples to the molecular polarization anisotropy, inducing rotational wavepacket dynamics. An interferogram is obtained from the delay dependent populations of the final field-free rotational states. Current experimental capabilities for cooling and preparation of the initial state are found to yield an interferogram visibility of more than 80%. The interferograms can be used to determine the polarizability anisotropy with an accuracy of about ±2%, respectively ±5%, provided the uncertainty in the initial populations and measurement errors are confined to within the same limits.

provided intensive review and valuable comments at all phases of this project. Pam Hackle\ (OEA Research). Robert Harris (Turnstone Biological), and Beth Kunkel (BRW. Inc.) also participiated in the imtial brainstorming session and provided key suggestions for revision. Alan Steinle of the U.S. Ariiiv' Corps of Engineers in Helena provided helpfiil comments from a policy perspective. Jeff Ryan of the Montana Department of Environmental Quality' assisted with issues pertaining to impaired waters. Additional members of the Montana Interagency Wetland Group provided helpful informal comments and suggestions. Finally, Steve Cooper and Bonnie Heidel of the Montana Natural Heritage Program provided invaluable assistance with respect to rare wetland plants and plant associations in Montana. Figure 1-Sample Assessment Areas Follows Page 3 KfDT Montana Wetland Assessment Method

The HGM method for wetland classification and functional assessment is currently under development for use in Montana. Once "up and running", the HGM method will likely be preferred by the COE relative to all types of projects that potentially affect wetlands and require a Section 404 permit. Work is currently underway to develop regional guidebooks for one subclass each of riverine and depressional hydrogeomorphic groups. These guidebooks may be available as early as midsummer of 1997, but will only apply to one subclass, not all subclasses, of riverine and depressional wetlands, and will likely apply only to the western portion of Montana. Work will continue relative to additional hydrogeomorphic groups, including high elevation slope wetlands, and additional subclasses of riverine and depressional wetlands; however, it is not known when models will be available for all Montana wetlands. MPT Montana Wetland Field Evaluation Form and Instructions July I, Consequently, MDT proposed to revise the 1994 MDT wetland evaluation form to be used in the interim, starting with the 1996 field season. METHODS The 1994 form was distributed to and comments solicited from over members of the Montana Wetland Council that were most likely to be familiar with the form. Comments were solicited from private consultants and numerous agencies/entities including the COE, USFWS, FWP, Environmental