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You searched on: Author: edwin heilweil

Displaying records 41 to 50 of 98 records.
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41. Ultrafast Transient THz Spectroscopy of Azobenzene
Published: 1/1/2005
Authors: Okan Esenturk, Edwin J Heilweil

42. Using Terahertz Spectroscopy to Quantify Pharmaceutical Tablet Composition
Published: 1/1/2005
Authors: M A Khan, H Wu, Edwin J Heilweil, A S Hussain

43. Comparative OHD-RIKES and THz-TDS Probes of Ultrafast Structural Dynamics in Molecular Liquids
Published: 10/1/2004
Authors: M C Beard, W T Lotshaw, T M Korter, Edwin J Heilweil, D McMorrow
Abstract: We compare terahertz time-domain (THz-TDS) and optical heterodyne detected Raman-induced Kerr effect (OHD-RIKES) spectroscopic techniques as probes of molecular and vibrational dynamics in the frequency range 0.1 THz to 6 THz (3 cm-1 to 200 cm-1). T ...

44. Femtosecond Infrared Coherent Excitation of Liquid Phase Vibrational Population Distributions (v [greater than] 5)
Published: 7/1/2004
Authors: T Witte, J S Yeston, Edwin J Heilweil, K L Kompa, M Motzkus
Abstract: Irradiation of a hexane solution of W(CO)6 with femtosecond mid-IR pulses, resonant with the transition energies for the first seven steps in the anharmonic potential of the T1u CO-stretch, has transferred vibrational population up to at least v = 6. ...

45. Ultrafast Chelation Dynamics of Cyclopentadienyl Manganese Tricarbonyl Derivatives with Pendant Sulfides
Published: 4/1/2004
Authors: J S Yeston, Edwin J Heilweil, T T To, T J Burkey
Abstract: The photoinduced dynamics of two new [h5-C5H4C(O)R]Mn(CO)3 complexes 2 (R = CH(SCH3)2) and 3 (R = C(SCH3)3) have been investigated in n-heptane solution on the ps to us timescale by UV-pump IR-probe transient absorption spectroscopy. Irradiation of ...

46. Noninvasive Detection of Weapons of Mass Destruction Using Terahertz Radiation
Published: 7/1/2003
Authors: M BC Campbell, Edwin J Heilweil
Abstract: The growing and immediate threat of biological and chemical weapons has placed urgency on the development of chemical and biological warfare agent (CWA/BWA) and explosive material screening devices. Specifically, the ability to detect CWA/BWA or exp ...

47. Terahertz Spectroscopy of Short-Chain Polypeptides
Published: 7/1/2003
Authors: M R Kutteruf, Craig Brown, L K Iwaki, M BC Campbell, T M Korter, Edwin J Heilweil
Abstract: Terahertz (THz) absorption and neutron vibrational spectra for solid-phase short-chain peptide sequences at 77 K and 298 K are reported. We demonstrate that a high degree of spectral and structural information exists for these systems in the 1 THz t ...

48. Non-Invasive Detection of Weapons of Mass Destruction Using Thz Radiation
Published: 1/1/2003
Authors: M J Campbell, Edwin J Heilweil

49. Vibrational Population Control in Liquid-Phase Metal Carbonyls
Published: 6/1/2002
Authors: V D Kleiman, Joseph S Melinger, Edwin J Heilweil
Abstract: Broadband picosecond and femtosecond mid-infrared chirped-pulse excitation with broadband probe techniques are being explored at NIST using multi-element, mid-infrared focal plane array detectors. Ultrafast infrared chirped IR pulse generation, dete ...

50. Applications of Ultrafast Transient Infrared Spectroscopies
Published: 5/1/2002
Authors: T Heimer, Edwin J Heilweil
Abstract: Modern techniques for performing ultrafast transient mid-infrared spectroscopy using turnable, broadband infrared probe pulses with multi-channel CCD and infrared focal plane array detection is presented. Novel application of these picosecond and fem ...

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