Zobrazeno 1 - 10
of 46
pro vyhledávání: '"J.M.F. Jeronymo"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 129:21-28
Nuclear and electronic sputtering was studied for the alkali halides LiF, CsI, NaF, NaCl, NaBr and NaI being vacuum evaporated on thin Al-foils and irradiated by 14 N ions having an energy loss of 20–190 eV/A. A double-grid time-of-flight technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70c4d008bd065592e1fda547d930c277
https://doi.org/10.1016/s0168-583x(97)00159-6
https://doi.org/10.1016/s0168-583x(97)00159-6
Autor:
J.M.F. Jeronymo, E. F. da Silveira, C. V. Barros Leite, K.B. Ray, Emile A. Schweikert, G.B. Baptista
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 136:107-117
Coincidence counting techniques for time-of-flight mass spectrometry have been applied to the study of secondary ion correlations. Phenylalanine samples were exposed to 2.5 MeV carbon ions with charge states ranging from +1 to +6. The influences of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9e26c64c63df6b8aea04f53de668e33
https://doi.org/10.1016/0168-1176(94)04045-1
https://doi.org/10.1016/0168-1176(94)04045-1
Autor:
E. F. da Silveira, R.R. Pinho, G.B. Baptista, A.C.M. Gonçalves, J.M.F. Jeronymo, C. V. Barros Leite
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 126:59-63
Neutral carbon, nitrogen and oxygen beams with an energy range of 300 keV–2 MeV (velocity range of 0.2–0.6 cm ns −1 ) have been used to induce secondary ion emission from solid samples. In this work, results for the ion desorption yield for hyd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b68b90e317cfb53d7e1d0f3d4c4c28ac
https://doi.org/10.1016/0168-1176(93)80070-u
https://doi.org/10.1016/0168-1176(93)80070-u
Autor:
E. F. da Silveira, G.B. Baptista, Emile A. Schweikert, C. V. Barros Leite, R.R. Pinho, J.M.F. Jeronymo
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 79:215-218
Secondary ion emission was studied using atomic and molecular ions bombarding organic and metallic targets. The energy of the projectile ions varied from 200 keV to 3 MeV. Relative yields of positive and negative secondary ions desorbed from phenylal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a00d29af49fcf4c5ab6533d2ccf47f3
https://doi.org/10.1016/0168-583x(93)95328-3
https://doi.org/10.1016/0168-583x(93)95328-3
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :361-364
Bombardment of solids with polyatomic projectiles (e.g., Cs 2 I + ) results in high secondary ion (SI) yields. For projectiles of 5–30 keV, SI yields as high as 10% have been observed; they are up to 50 times higher than those obtained with equal v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99c003ab97868b7a728898f70a65ab57
https://doi.org/10.1016/0168-583x(91)96048-p
https://doi.org/10.1016/0168-583x(91)96048-p
Autor:
D.P. Almeida, J.M.F. Jeronymo, N. V. de Castro Faria, A. G. de Pinho, F.L. Freire, E. C. Montenegro
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 16:334-339
Diatomic (H2+, D2+, HD+, HHe+) and triatomic (H3+) molecular beams were used to produce H− and D− ions afte thin carbon foils. The dwell time covered a region from 0.75 to 15 fs, depending on the nature of the incident beam. The ratio Φ M Φ A h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c14edfde410074d3ab073ecbc9082bb5
https://doi.org/10.1016/0168-583x(86)90092-3
https://doi.org/10.1016/0168-583x(86)90092-3
Autor:
J.M.F. Jeronymo, E. F. da Silveira
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :534-537
The total secondary electron emission yield from the entrance and exit surfaces of thin aluminium foils has been measured for protons, deuterons and He beams in the MeV region. It is found that this yield for each surface decreases with the ion beam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1559ec53d9bc0a62bbe42ea2eede9074
https://doi.org/10.1016/0168-583x(87)90702-6
https://doi.org/10.1016/0168-583x(87)90702-6
Autor:
D.P. Almeida, A. G. de Pinho, F.L. Freire, E. C. Montenegro, N. V. de Castro Faria, J.M.F. Jeronymo
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 17:321-324
Neutral and negative equilibrium fractions for protons and deuterons emerging from carbon foils were measured in the incident energy range 250–4000 keV/u. Simultaneous detection of the positive and the neutral (or negative) component of the system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f81f94597195d0812e83662c08e4d6e9
https://doi.org/10.1016/0168-583x(86)90119-9
https://doi.org/10.1016/0168-583x(86)90119-9
Publikováno v:
Zeitschrift für Naturforschung A. 25:1250-1254
Seven previously unreported gamma rays in the decay of Mo91 g-s -were observed and had their energy and intensity measured. For Mo91m two new gamma rays were observed and the levels fed by its decay were identified with l=1 levels found by (He3, d) r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38b7abcc6076abd7dc73344328af6328
https://doi.org/10.1515/zna-1970-8-912
https://doi.org/10.1515/zna-1970-8-912
Publikováno v:
Nuclear Physics. 33:449-457
The Li/sup 6/(d, alpha ) alpha reaction was studied up to 5 Mev deuteron energy. A level in Be/sup 8/ at 25.3 Mev excitation was observed having probably J = 2 plus or minus and T = 0. (auth)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d069a05de1ce0535eb96e23df9aebf31
https://doi.org/10.1016/0029-5582(62)90537-0
https://doi.org/10.1016/0029-5582(62)90537-0