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SCI Özgün Makale Scopus 🌍 Uluslararası
Ionization and dissociation of benzaldehyde using short intense laser pulses
JOURNAL OF PHYSICAL CHEMISTRY A 1998 Cilt 102 Sayı 15
Scopus Eşleşmesi Bulundu
33
Atıf
102
Cilt
2519-2526
Sayfa
Scopus Yazarları: D. J. Smith, Kenneth William David Ledingham, Hamdi Şükür Kılıç, T. McCanny, W. X. Peng, R. P. Singhal, A. J. Langley, P. F. Taday, C. Kosmidis
Özet
In a recent series of experiments, femtosecond laser mass spectrometry (FLMS) was applied to benzaldehyde utilizing laser pulse widths in the range 90 fs to 2.7 ps. Beam intensities up to 2 × 1014 W cm-2 were used with wavelengths of 750 and 375 nm. Different ionization-dissociation channels were found compared with previous studies by other authors based in the nanosecond regime. The general theme emerging is one of predominant above-threshold ionization-dissociation (ID) in which predissociative states are largely bypassed via rapid optical up-pumping to the molecular ionization continuum. Above the parent ionization threshold, ladder-switching is seen to be a function of laser pulse width, intensity, and wavelength with exclusive parent ion formation being achievable in the lower intensity regions at all pulse widths. Increasing fragmentation occurs as the laser intensity increases, although parent supremacy remains. At 750 nm however, the increase of fragmentation with intensity is greatly reduced compared to 375 nm, leading to the conclusion that FLMS at longer wavelengths is preferred for chemical analysis. Moreover at 750 nm and at laser intensities close to 1014 W cm-2 C7H6O2+ becomes evident. It is also shown that the C7H6O+/C7H5O+ ratio is strongly dependent on the pulse width, suggesting that a hydrogen loss pathway has a dissociation time of about a picosecond.

Makale Bilgileri

Dergi JOURNAL OF PHYSICAL CHEMISTRY A
ISSN 1089-5639
Yıl 1998 / 4. ay
Cilt / Sayı 102 / 15
Sayfalar 2519 – 2526
Makale Türü Özgün Makale
Hakemlik Hakemli
Endeks SCI
YÖKSİS Atıf 33
Yayın Dili İngilizce
Ülke AMERİKA BİRLEŞİK DEVLETLERİ Uluslararası
Şehir Washington
Kapsam Uluslararası
Toplam Yazar 9 kişi
Erişim Türü Basılı+Elektronik
Erişim Linki Makaleye Git
Alan Fen Bilimleri ve Matematik Temel Alanı- Fizik

YÖKSİS Yazar Kaydı

Yazar Adı SMITH DJ,LEDINGHAM KWD,KILIÇ HAMDİ ŞÜKÜR,MCCANNY T,PENG WX,SINGHAL RP,LANGLEY AJ,TADAY F,KOSMIDIS C
YÖKSİS ID 669228

Metrikler

YÖKSİS Atıf 33
Scopus Atıf 33
Yazar Sayısı 9