Photodissociation of CH2BrCHBrC(O)Cl at 248 nm: probing Br2 as the primary fragment using cavity ring-down spectroscopy

The photodissociation of 2,3-dibromopropionyl chloride (CH2BrCHBrC(O)Cl, 2,3-DBPC) at 248 nm was carried out to study Br2 as the primary molecular product in the B3Π+0u ← X1Σ+g transition using cavity ring-down absorption spectroscopy.

RS 1.009 (CTA 36, KTU 1.46): reconstructing a Ugaritic ritual

In an article published in UF, 16, 1984, entitled ‘The ritual KTU 1.46 (= RS 1.9) and its duplicates’, M. Dijkstra proposed that to the large fragment of the ritual tablet RS 1.009 should be joined four fragments. None of these is supposed to be a physical join, neither with RS 1.009 nor with any other of the smaller fragments, but all five fragments are said to have originally been part of the same tablet. To Dijkstra's transliteration (pp. 71–2) is added a sixth fragment, RS 1.009A, about the ascription of which to RS 1.009 Dijkstra is not sure (see p. 70). The reconstruction, with assumed proper placement of each of the five primary fragments was illustrated in a collage made up of Dijkstra's own copies of the small fragments and Virolleaud's copy of the primary fragment (p. 76). My intention here is to discuss the validity of the hypothetical reconstruction. The texts given below, based on new collations, are presented here for the first time. Philological aspects of the interpretation of the texts will not be dealt with here; for such matters see my forthcoming edition of the Ugaritic ritual texts.

Zweistufige metastabile Zerfallsprozesse in Feldionisations-Massenspektren

The kinetics of metastable decomposition of primary fragment ions of organic molecules is studied by a field ionization mass spectrometer. It is shown that a water molecule is eliminated f r om 1-hexanol within a very short time interval after field ionization (10-12<t<10-8 sec).The(M-H2O)+ ion eliminates CH3 , CH4 or C2H4 , respectively, in a second step after about 2x10-6 sec. The equations for calculation of the apparent mass of a metastable secondary fragment ion formed by a fast primary fragment ion are given.