Network Generator
What is NetGen?
Welcome to the Network Generator
NetGen is a tool to help astrophysicists
 building up the nuclear reaction networks according to the given reactions.
 generating tables of nuclear reaction rates on a temperature grid specified by the user.
 plotting the individual reaction rates against temperature.
This tool makes use of an extended database maintained at the
Institut d'Astronomie et d'Astrophysique
(Université Libre de Bruxelles). It covers about
9200 isotopes, from the proton to the neutrondrip lines, and
from Z=1 up to Z=110. The astrophysical reaction rates are provided
for a large variety of nuclear reactions of interest for bigbang
nucleosynthesis, stellar hydrogen, helium and later burning phases
(hydrostatic and explosive), as well as for the synthesis of heavy
nuclei (s, r, p, rp, alphaprocesses).
Those include lightparticle (mostly n, p, alpha) induced reactions
and nucleusnucleus reactions, photodisintegrations, as well as
betadecay and electron capture rates.
The rates are selected from the sources we consider now as the most
reliable ones.
For particleinduced reactions, rates based on experimental data or,
when no such experimental data exist, on detailed microscopic calculations (nuclear HauserFeshbach reaction rate predict by TALYS) are
generally preferred. For experimential reaction rates, various choices are possible as well (consult the
user manual
to learn how to select them).
Laboratory values and different theoretical estimates (using
statistical or microscopic nuclear models) are used for the weak
interaction rates.
Photodisintegrations and some particle induced reaction rates are
computed from their reverse reaction rates, the
partition functions are used for evaluating reverse reaction rates. The appropriate Q
values are derived from Audi et al. (AME 2010) or, if not available, from
Goriely et al. HFB17 mass table. Stellar enhancement factors (SEF) are included for most laboratory experimental reactions
(exceptions are reactions from the CF88 library, and
Descouvemont et al. compilation) and the values used are clearly
documented (Note that for TALYS HauserFeshbach rates the SEFs are
already included in the
tabulated values).
The following database, including experimental and theoretical reaction rates, partition functions, and nuclear mass tables, are currently available to
NetGen:

NACRE
(The European Nuclear Astrophysics Compilation of
REaction Rates)

The
Iliadis et al. table of protoncapture rates on 20 < A <
40 nuclei (2001, ApJS 134, 151)

Descouvemont et al. compilation of Big Bang nucleosynthesis
reaction rates
(2004, Atomic Data Nuclear Data Tables 88, 203).

Caughlan and Fowler 1988 (CF88) for
the reaction rates and various sources for reactions involving
charged particles [including (n,p) and (n,α)
reactions] which are not included in NACRE or in CF88,
or when those sources supersede CF88.

Experimental radiative neutroncapture
rates before 2000 (from the
Bao et al. table
).

Experimental radiative neutroncapture
rates from the year 2000 to 2011 which are not included in table of Bao et al.

NACRE II, An Update and Extension of the NACRE Compilation of Chargedparticleinduced Thermonuclear Reaction Rates for Astrophysics (2013, NPA 918, 61)

Iliadis et al.: The 2010 Evaluation of Monte Carlo based Thermonuclear Reaction Rates (2010, NPA 841, 1)

HauserFeshbach Reaction Rates calculated with the code
TALYS.

Betadecay rates from Goriely (1999,
Astron. Astrophys. 342, 881; Table available in electronic
form
here

Betadecay rates from Takahashi & Yokoi
(1987, Atomic Data Nucl. Data Tables 36, 375).

Specific electron capture rates from various published sources
 Experimental Betadecay rates: Nishimura S. et.al. (2011), Phys. Rev. Lett 106, 052502, and Katakura J. (1996) Chart of the Nuclides
(Japanese Nuclear Data Committee and Nuclear Data Center, Japan Atomic Energy Research Institute).
 Betadecay rates complemented
by theoretical calculated
with ervised Gross Theory (GT2)+ Qbeta from HFB14 mass model, branching
factor for delayed particle emission included. Tachibana et al., (1990) Prog. Theor. Phys. 84, 641.
 Betadecay rates complemented
by theoretical calculated
with QRPA + FRDM models. Moeller, Nix & Kratz (1997),
(Ref: LAUR943898).

Density and temperaturedependent Betadecay rates from
Oda et al. (1994, Atomic Data Nuclear Data Tables 56, 231)

Density and temperaturedependent Betadecay rates from Langanke & Martinez (2000, Nucl. Phys. A 673, 481).

Nuclear masses predicted by the
HFB17 mass model.

Nuclear partition function for reverse reaction rate evaluation.
Instructions on how to use the network generator are available
here, in particular
how to select the various nondefault rates, using the
bibliographic index
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