VARLAMOV.readme
Parameters of Giant Dipole Resonances
(By V.V. Varlamov et al, CDFE Moscow)
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Background
----------
V.V. Varlamov et al, Centre for Photonuclear Experiments Data
(CDFE), Institute of Nuclear Physics of the Moscow State University
(Moscow, Russia) compiled extensive bibliography of Photonuclear
Data [1]. As a comprehensive addition to the compilation is a table
"Parameters of Giant Dipole Resonance", see pp. 196 - 213 of Ref.[1]
and Ref.[2].
The table contains information on giant dipole resonance (GDR)
parameters for 82 elements (215 isotopes and natural compositions)
with Z between 1 and 95. There is altogether about 1 050 entries.
Included are parameters deduced from various photonuclear cross
sections, such as photoabsorption, total neutron production, neutron
yield, and also single, double and triple neutron production, charged
particle emission and fission. The table, that is more extensive than
the well known atlas by Dietrich & Berman [3], contains also all
GDR parameters included in Ref.[3].
Contents of varlamov.dat
------------------------
The file contains those GDR parameters, selected from Refs.[1,2], that
may be of direct interest to nuclear reaction model calculations:
1. GDR parameters deduced from photoabsorption (G,ABS) cross sections,
and GDR parameters deduced from total neutron production (G,SN)
cross sections
(G,SN) = (g,n) + (g,np) + (g,2n) + (g,3n) + ... +(g,F)
since often (G,SN) is a good approximation to (G,ABS). It should
be noted that the atlas by Dietrich & Berman [3] is based purely on
total neutron production cross sections (termed "total photoneutron
cross sections, sigma(g,tot)" in Ref.[3]).
2. In the cases when (G,ABS) and (G,SN) data are not available, GDR
parameters deduced from neutron yield (G,XN) cross sections
(G,XN) = (g,n) + (g,np) + 2(g,2n) + 3(g,3n) + ... + nu(g,F)
are presented.
3. In the cases when none of the above data are available, GDR parameters
deduced from neutron yield (G,N), (G,2N), and (G,F) cross sections for
most heavy nuclei are presented.
Altogether, the file varlamov.dat contains 366 entries:
Reaction No of entries
........ .............
(G,ABS) 56
(G,SN) 259
(G,XN) 18
(G,N) 5
(G,2N) 2
(G,F) 26
........ .............
Total 366 entries
Format of varlamov.dat
----------------------
Each entry is represented by 1 line containing description of the reaction,
numerical data of GDR parameters and reference. In the cases when there are
more than one clear maxima with comparable amplitudes in the GDR cross
section, their parameters are shown in additional lines.
The format is as follows:
NUCL A REACT E-MAX SIG FWHM E-INT SIG-INT SIG-INT-1 REFERENCE AUTHOR
(MeV) (mb) (MeV) (MeV) (MeV*mb) (mb)
Code Contents
........... ............................................................
NUCL nucleus investigated
A nucleus investigated (mass number)
REACT reaction
E-MAX cross section maximum energy
(for two or three clear maxima the additional lines are used)
SIG maximum cross section value
FWHM full width at half maximum
E-INT integration energy limit
SIG-INT integrated cross section
SIG-INT-1 first moment of the integrated cross section
REFERENCE reference
AUTHOR 1-st author
G,ABS total photoabsorption cross section
G,XN neutron yield cross section
[(g,n) + (g,np) + 2(g,2n) + 3(g,3n) + ... + nu(g,F)]
G,SN total neutron production cross section:
[(g,n) + (g,np) + (g,2n) + (g,3n) + ... + (g,F)]
G,N single neutron cross section
[(g,n) + (g,np)]
G,2N double neutron cross section
[(g,2n) + (g,2np)]
G,3N triple neutron cross section
[(g,3n) + (g,3np)]
G,F fission/neutron cross section for actinides
[(g,F) = (g,f) + (g,nf) + ... ]
...........................................................................
Online access
-------------
The complete GDR table [1,2] can be accessed and retrieved from the CDFE
Web site
http://depni.npi.msu.su/cdfe/
References
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[1] V.V. Varlamov, V.V. Sapunenko and M.E. Stepanov "Photonuclear
Data 1976 - 1995. Index." (Moscow State University, Moscow 1996).
[2] V.V. Varlamov, B.S. Ishkanov and M.E. Stepanov "Systematics of
Main Parameters of Atomic Nuclei Giant Dipole Resonances and
Photonuclear Reaction Threshold Values", Moscow State
University Institute of Nuclear Physics Preprint-96-32/439
(Moscow 1996).
[3] S.S. Dietrich and B.L. Berman "Atlas of Photoneutron Cross Sections
Obtained with Monoenergetic Photons", Atomic Data and Nuclear Data
Tables 38 (1988) p. 199.