Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New 34Cl proton-threshold states and the thermonuclear 33S(p,gamma)34Cl
  rate in ONe novae   Analysis of presolar grains in primitive meteorites has shown isotopic ratios
largely characteristic of the conditions thought to prevail in various
astrophysical environments. A possible indicator for a grain of ONe nova origin
is a large 33S abundance: nucleosynthesis calculations predict as much as 150
times the solar abundance of 33S in the ejecta of nova explosions on massive
ONe white dwarfs. This overproduction factor may, however, vary by factors of
at least 0.01 - 3 because of uncertainties of several orders of magnitude in
the 33S(p,gamma)34Cl reaction rate at nova peak temperatures (Tpeak ~ 0.1 - 0.4
GK). These uncertainties arise due to the lack of nuclear physics information
for states within ~ 600 keV of the 33S+p threshold in 34Cl (Sp(34Cl) = 5143
keV). To better constrain this rate we have measured, for the first time, the
34S(3He,t)34Cl reaction over the region Ex(34Cl) = 4.9 - 6 MeV. We confirm
previous states and find 15 new states in this energy region. New
33S(p,gamma)34Cl resonances at ER = 281(2), 301(2) and 342(2) keV may dominate
this rate at relevant nova temperatures. Our results could affect predictions
of sulphur isotopic ratios in nova ejecta (e.g., 32S/33S) that may be used as
diagnostic tools for the nova paternity of grains.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int