Topic
Tasks
First forbidden transitions
1 - Survey all published
measured beta spectra data.
List of 0-,1-,2- transitions
(review of spins/parities)
2- Give the list of important
contributors among those
nuclei to theoreticians
3 - Compare these data with
theoretical calculations.
Compare the calculation of
transition types over all the
nuclei.
Already give the main trends of
effect of first forbidden decays
on antineutrino spectra.
1 - List the data deficiencies we
are aware of.
2 - Create a priority list of
nuclides whose decay
properties need to be studied
experimentally
+ Give a short list of nuclei to
be studied by theoreticians.
Pandemonium and First
Forbidden
Pandemonium or other
experimental biases of data
Theory
Weak Magnetism
Understand the disagreement
between the Rudstam beta
spectra and that derived from
Greenwood TAS data and new
TAS measurements.
Write the beta and antineutrino spectra equations for
allowed and forbidden
transitions with explicit
dependence on the beta and
antineutrino kinetic energy.
Provide required coefficients
for shape calculation.
1 - Study Weak Magnetism
for Fission Products : survey
of available information in
the data
2 – Make new Weak
Magnetism calculations with
better models than impulse
approximation
3 – Make theoretical with
impulse approx. for fission
products
Members of the task
subgroups
Actions & Deadlines
Write a summary giving
the current status.
Provide tables of well
measured cases.
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the current status.
List of nuclei: criteria =
contribution, spin/parity
knowledge, Pandemonium
candidate, GS branch,
complementarity with other
measurements (TAS, HR &
beta shapes)
Provide a detailed analysis
nucleus by nucleus.
Write a summary giving
the current status.
Write a summary giving
the current status.
Write a summary giving
the current status.
Fission Yields
1 – give a critical assessment
of existing fission yields and
existing errors (detailed
analysis for important
contributors), including
covariance matrices
2 – List important fission
yields to (re-) measure
3 – Fission Yields of isomers
are an issue
4 – Fission yield dependence
on the neutron energy
5 – try a set of fission yield
data coming from only one
type of experiments, with
knowledge of covariance
matrix
6 – meta analysis for
covariance matrix for JEFF
FY
7 – Check impact of decay
data on fission yield data
Write a summary giving
the current status.
Towards the state of the art
of the summation method
Use the list of recommended
data (beta decay &fission
yields) defined in the previous
tasks.
Develop and make available
codes to calculate beta and
antineutrino spectra.
Make available a data library in
a simple format for
summation calculations.
Write a summary giving
the current status.
Error calculation associated
to summation method
spectra
First give a conservative
error envelop. Tabulate
various sources of
systematics and provide a
rough estimate of our
confidence.
A covariance matrix will be
needed.
Develop methodologies for
the propagation of errors on
summation method spectra
& Make calculation
1 – Use different conversion
method
2 – Assess potential impact
of first forbidden non
unique transitions and weak
magnetism (help from
theory would be welcome)
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the current status.
Reinvestigation of the
conversion method
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the current status.
Neutrino Experiments
New Nuclear Physics
Experimental needs
Synergy with Decay heat,
prompt neutron numbers,
beta delayed neutron
emission
ILL + Münich integral beta
spectra
Motivations for neutrino
physics (fundamental &
applied)
Neutrino experiments
3 – Converge towards a
conservative error
4 – Compare converted
spectra from 250keV and
50keV ILL data
Provide measured spectra in
antineutrino energy
Provide for that response
matrices of the detectors
Provide required
information about reactor
fuel compositions associated
with measured spectra
1 – TAS experiments on
Pandemonium nuclei
important for antineutrino
spectra
2 – Measurement of the
electron spectrum for 0-, 1and 2- transitions, especially
for important contributors
(to x-check theoretical
predictions)
3 – Measurement of Weak
Magnetism
4 – Measurement of Fission
Yields (for important
contributors)
Discussions intercommunities => organize
common effort (WPEC,
IAEA)
Underline the Potential
impact on reactor physics
Fresh look at these
experiments from experts of
this type of experiments at
reactors ?
New integral measurements
of electron spectra
associated to thermal U5,
and Pu isotopes, and U8 fast
fission
Current and future needs
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the current status.
Write a summary giving
the current status.
Describe the current effort
and the expectations
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the current status.
Write a summary giving
the current status.
Write the introduction of
the white paper !
Describe the current effort
and the expectations
relative to spectral
measurement (from sterile
nu expts, and DC, DB, and
Reno)