Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Ralph A. Hewes"'
Publikováno v:
Review of Progress in Quantitative Nondestructive Evaluation ISBN: 9781461377252
The standard for sensitive detection and resolution of defects in metal components is scanned focused immersion inspection to produce C-scans. Laser ultrasound, although successfully applied to composite inspection, has previously not produced compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c58816851227e430114563d281334d1
https://doi.org/10.1007/978-1-4615-5947-4_73
https://doi.org/10.1007/978-1-4615-5947-4_73
Autor:
Ralph A. Hewes, M.V. Hoffman
Publikováno v:
Journal of Luminescence. 3:261-280
The emission from Eu 2+ , which is isoelectronic to Gd 3+ , in all previously investigated systems consists of a broad (R~ 2000 cm -1 band, which at low temperatures may be accompanied by a zero-phonon line. We have discovered a group of compounds in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0374fdc3c1d534a1f9b738e628e0dae3
https://doi.org/10.1016/0022-2313(71)90064-0
https://doi.org/10.1016/0022-2313(71)90064-0
Publikováno v:
Physical Review B. 7:1657-1667
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebc9785fa1502c9bd0d142c816c0a5cf
https://doi.org/10.1103/physrevb.7.1657
https://doi.org/10.1103/physrevb.7.1657
Autor:
Ralph A. Hewes
Publikováno v:
Journal of Luminescence. :778-796
The investigation of the production of visible luminescence from infrared radiation in the systems LnF 3 : Yb 3+ , R.E. 3+ , where Ln is La, Y, Gd, or Lu, and R.E. is Er, Ho or Tm, revealed that the excitation process involves absorption by Yb 3+ ion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4578b07aca6f56e689325c4b3973f081
https://doi.org/10.1016/0022-2313(70)90090-6
https://doi.org/10.1016/0022-2313(70)90090-6
Autor:
Ralph A. Hewes, James F Sarver
Publikováno v:
Physical Review. 182:427-436
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a39291f803ac461f570f25e8710a900b
https://doi.org/10.1103/physrev.182.427
https://doi.org/10.1103/physrev.182.427
Autor:
Ralph Allan Hewes
Publikováno v:
Journal of Applied Physics. 39:4106-4123
Photoconductivity decay measurements on a wide variety of silicon crystals (boron‐ and phosphorusdoped, Czochralski and float‐zone grown, 20≤ρ≤200 Ω·cm) irradiated with 60Co gamma rays indicate that a separate system of levels controls the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25b11d3c262ca443aad35f2b66b8c360
https://doi.org/10.1063/1.1656933
https://doi.org/10.1063/1.1656933
Publikováno v:
Acoustical Imaging ISBN: 9781461280842
Since the introduction of the mechanically scanned acoustic microscope by Lemons and Quate,1 a world-wide effort has taken place to make this device2 one of the most widely used tools for materials characterization and development. With the exception
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d266bf828f528ea6394b05234d087b6c
https://doi.org/10.1007/978-1-4613-0791-4_10
https://doi.org/10.1007/978-1-4613-0791-4_10
Autor:
Hewes, Ralph A.
Publikováno v:
Journal of Applied Physics; Aug1968, Vol. 39 Issue 9, p4106-4123, 18p
Autor:
Donald O. Thompson, Dale E. Chimenti
These Proceedings, consisting of Parts A and B, contain the edited versions of most of the papers presented at the annual Review of Progress in Quantitative Nondestructive Evaluation held at the Snowbird Ski and Summer Resort in Snowbird, Utah on Jul
Autor:
Donald Lines Jacobus
This is a work of such incredible detail that it is thought to have elevated genealogy to an exact science. It is the definitive statement on the ancestry and relationships of 35,000 residents of eighteenth-century New Haven, Connecticut, and it is t