Zobrazeno 1 - 10
of 13
pro vyhledávání: '"J. M. Heller"'
Publikováno v:
Applied optics. 16(9)
In an attempt to improve the accuracy of reflectance determinations, particularly from high vapor pressure samples, we have built and tested a double ionization chamebr which measures the ionization from a photon beam in the vapor or added gas before
Autor:
L J, Dlugosz, W J, Hocter, K S, Kaiser, J D, Knoke, J M, Heller, N A, Hamid, R J, Reed, K S, Kendler, G C, Gray
Publikováno v:
Journal of clinical epidemiology. 52(12)
Effects of Persian Gulf War (August 2, 1990-July 31, 1991) and Gulf War occupation on post-War hospitalization risk were evaluated through Cox proportional hazards modeling. Active-duty men (n = 1,775,236) and women (n = 209,760) in the Army, Air For
Autor:
M C, Poirier, A, Weston, B, Schoket, H, Shamkhani, C F, Pan, M A, McDiarmid, B G, Scott, D P, Deeter, J M, Heller, D, Jacobson-Kram, N, Rothman
Publikováno v:
Cancer epidemiology, biomarkersprevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology. 7(6)
Biomarkers of polycyclic aromatic hydrocarbon (PAH) exposure and genetic biomarkers of potential cancer susceptibility were determined in a group of United States Army soldiers who were deployed to Kuwait and Saudi Arabia in 1991 in the aftermath of
Publikováno v:
The Journal of Chemical Physics. 76:5208-5213
Our apparatus has been modified to permit measurements of absolute photoemission as well as reflectance of liquids in the vacuum UV. Photon fluxes are determined by filling the tandem ion chambers with argon. An electrometer is connected to the sampl
Publikováno v:
The Journal of Chemical Physics. 62:4121-4124
The optical properties of the liquids normal tetradecane (C14H30) and normal heptadecane (C17H36) were determined for photon energies from 4 to 25 eV. Near normal incidence (15 °) reflectance measurements were analyzed by a Kramers–Kronig method t
Publikováno v:
The Journal of Chemical Physics. 60:3483-3486
Measurements of the optical properties of liquid water were extended in the vacuum ultraviolet up to an energy of 25.6 eV. The indices of refraction and dielectric functions were obtained by a Kramers‐Kronig analysis using reflectances measured in
Publikováno v:
The Journal of Chemical Physics. 74:200-204
The reflectance of liquid hexamethylphosphoric triamide has been determined between 2 and 9 eV by the semicylinder method and between 10 and 25 eV by the double ionization chamber method. Kramers‐Kronig analysis of the data gave the optical and die
Publikováno v:
The Journal of Chemical Physics. 69:4185-4188
In the vacuum ultraviolet spectral region, all solids strongly absorb electromagnetic radiation. Thus, optical properties of liquid surfaces must be obtained from reflectance measurements on a sample exposed to near vacuum rather than from a conventi
Publikováno v:
Journal of Applied Physics. 51:1747-1750
The optical functions of polycrystalline anthracene films have been determined in the spectral region between 3.2 and 9.3 eV. Conventional reflectance techniques using the semicylinder method were used to obtain the optical and dielectric functions f
Publikováno v:
Radiation research. 52(1)