Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identifying Strong-Field Effects in Indirect Photofragmentation
  Reactions   Exploring molecular breakup processes induced by light-matter interactions
has both fundamental and practical implications. However, it remains a
challenge to elucidate the underlying reaction mechanism in the strong field
regime, where the potentials of the reactant are modified dramatically. Here,
we perform a theoretical analysis combined with a time-dependent wavepacket
calculation to show how a strong ultrafast laser field affects the
photofragment products. As an example, we examine the photochemical reaction of
breaking up the molecule NaI into the neutral atoms Na and I, which due to
inherent nonadiabatic couplings is indirectly formed in a stepwise fashion via
the reaction intermediate NaI. By analyzing the angular dependencies of
fragment distributions, we are able to identify the reaction intermediate NaI
from the weak to the strong field-induced nonadiabatic regimes. Furthermore,
the energy levels of NaI can be extracted from the quantum interference
patterns of the transient photofragment momentum distribution.

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The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph