The database contains the results of calculations with the
statistical model (Hauser-Feshbach)
for an energy and temperature range which is interesting
for astrophysical purposes. Several tables with information can be
Calculations in the statistical model require the input of a
different nuclear properties:
Although the model is well-established, different
calculations vary in the various inputs and treatments of such
properties. In the calculations presented here, it was attempted to
descriptions which can be used to predict nuclear properties also for
nuclei far off stability for which no experimental data is known.
Therefore, it was tried to minimize the direct input of experimental
data (although some parametrizations are fit to available nuclear
Thus, we are interested in descriptions which lead to a low
deviation between predicted and observed
Nevertheless, local deviations of higher magnitude can occur.
Details about the inputs used for this statistical model
calculation are given on the same page as the requested table. For an
explanation of the
reference codes and for more details on the calculations and the
NON-SMOKER code, see the reference
Accessing the database
The access form
should be quite
self-explanatory. In the element box, the standard abbreviation of the
should be input, as it is used in periodic systems or nuclear charts;
Ne for Neon or
for Gold (input is not case sensitive). The massnumber is an integer
with 2 or 3 digits.
The recommended set of options is the default,
therefore it should be sufficient in most cases to just enter element
and mass number and to select which kind of table and reaction one
By default, in the calculations experimental values are used if
available. The setting of the theoretical mass will affect
experimentally unknown masses (separation energies), as well as the
level density for all nuclei.
The FRDM covers the widest mass range, ETFSI values are available only
for A>35, and the ETFSIQ table starts at Cr (Z>23).
Applicability of the model
On some of the tables, warnings may be
given that the
statistical model may not be applicable below a
or temperature, although values are given below that limit. The
statistical model assumes that averaged transmission functions can be
used, i.e. averaging over resonances in the contributing energy window
is permitted. At lower excitation energy of the compound nucleus, fewer
resonances will be available and thus there may be a lower
energy/temperature limit for the application of the model.
An estimate of the limiting energy/temperature was derived
in a previous paper
and this is used
It has to be emphasized that very conservative assumptions are
that the given results may be valid even below the given limit. The
warning is merely issued to point out that one should be cautious and
aware of the limitations.
There may be another limitation inherent to all statistical
calculations which do not explicitly include gamma cascades in the
compound nucleus. Treating the cascades and the particle escape from
cascade only approximately may lead to larger errors for reactions with
negative reaction Q values, i.e. for endothermic
is not necessarily the case but, in general, for these cases it is
to calculate the reverse reaction (with positive Q
compute the desired reaction by applying detailed balance.
Referencing the results
When using results from this database and the linked pages,
should be given to the access page
and the NON-SMOKER
I would appreciate it if a copy of the work is
sent to me
publication, so that misconceptions or misinterpretations of the
can be avoided.
Please see also the disclaimer.
There are several error messages which can be returned
instead of the
requested table. They should be self-explanatory. Below is a list of
- Database access disabled!
- Access to the database is currently not possible, due to
locking. Please try again later.
- Unauthorized Access or Wrong Password
- A wrong username/password combination has been entered (or
all). Please try again with the correct combination.
- Error in element name
- The element name cannot be recognized. Remember that you
have to input the abbreviation of the
element, not the charge number. Please
- Error in mass number
- The mass number cannot be converted. Remember that it has to be an integer between 0 and
999. Please try again.
- The results for the requested reaction are
currently not publicly
- For certain reasons, some of the reaction results may still
restricted. Please try again later. In urgent cases you may send
an email message
- Database currently not accessible...
- The database cannot be opened, either due to intentional
because of a crash of the file system. Please try again later.
- Error: Statistical model may not be
applicable for this target:
- For very light elements, one has to be very careful in
statistical model. Instead of a simple warning message, the access has
been disabled for very light nuclei. If you are interested in results
for those, please send a request by email.
- No values for this target available
- For the requested reaction, no entry was found. Either you
specified an unbound target outside the neutron- or proton-dripline, or
outside the range of calculated elements. (Note, that different mass
formula also yield different locations of the driplines).
- Error in target specification
- Either mass number or element name (or both) have not been
in the query string. This should never happen when the HTML form is
- Unknown Table Option
- An unknown option for a table has been specified in the
string. This should never happen when the HTML form is used.
- Error in Database!
- The specified target and reaction was found but the data
was not in
the proper format. If you encounter this message, please send a
message by email,
- Error in access control script
- Fatal error. If you encounter this, please send a
message by email,
If you encounter a failure or an inexplicable result, please
of the database
and the used methods. Check also the explanation of the error messages
. Consult the history section
for further details
of the current release.
In case you still think that there
might be a bug in the database or in the returned result, please send a
specifying exactly what you did and where you see the problem.
This history list is being discontinued as it is replaced by the
. Please look there for revisions and other information.
Moved to new server. Layout change of web page; database functions should
9-Jul-2005 to 11-Jul-2005
Temporarily unavailable due to hardware problem!
Displaying the lower temperature/energy limit for the statistical model
did not work since the reconfiguration of the filesystem in March (see
below). Fixed. At the same time, an error in the displayed limits was
(the target level density was used instead of the one in the compound
system). Fixed (new version number 2.3).
Due to a misconfiguration in the new filesystem, the database could not
be accessed for about a week. Fixed.
Free access to the Java and HTML interface! The password restriction
been lifted. The ADNDT reference page
New main page introduced. The main page contains additional information
on the newly published tables of cross section and reaction rates. The
ADNDT reference page
updated, too. The NON-SMOKER query form was moved to a separate page.
Machine readable files
with the complete sets of reaction rate fits,
reaction rates, cross sections, partition functions and experimental
level information are available on-line. This is in addition to the
interactive nucleus-by-nucleus NON-SMOKER interfaces in Java and HTML.
The cross sections and rates in the files correspond to the ones
published in Atomic Data Nuclear Data Tables
(September issue). See that
for a detailed explanation of the tables.
The web site was unaccessible due to a hardware failure between March
16th and March 20th. Short periods of unavailability could be
experienced in the next few days.
New Java interface brought online!
Isospin suppressed reactions made available.
Public version 2.2: Update of ETFSI version.
The present versions of the FRDM and ETFSI-Q rates correspond to the
rate fits published in Atomic Data Nuclear Data Tables
(2000) 1 (Parts 1 and 2,
see also the preprint
Public version 2.1: Update of ETFSI-Q version.
Public version 2.0: Fixed some bugs in version 1.5 for alpha
unstable nuclei. So far, only the FRDM version is updated!
Public version 1.5: Fixed a few ground state spins far off stability.
This leads to a few altered rates and partition functions.
The machine is up and running. Access is ok. No damage done.
Due to a severe hardware crash, the site is temporarily unaccessible.
Operation is expected to resume Sep 13.
The cluster is up and the site is working again.
Due to a severe hardware crash, the site is temporarily unaccessible.
Operation is expected to resume May 17.
15-Mar-1999 till 19-Mar-1999
Due to an upgrade of the operating system of the server, the database
may not be accessible all the time during the dates given above. Make
sure to try at different times.
Public version 1.33/1: Exponents of MACS print correctly now. All
exponents are now denoted by 'e' instead of 'D'.
22-Feb-1999 till 26-Feb-1999
Due to a failure of a power supply the database was not accessible in
the week given above. If you encountered an error
while trying to retrieve results, please try again.
Public version 1.33/0 of the database has been put on the Web. Isospin
suppressed reactions still restricted.