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CN formation cross section in CN formation cross section in nucleon induced reactions on nucleon induced reactions on 238238UU
Efrem Soukhovitski, JINEREfrem Soukhovitski, JINER
Frank Dietrich, LLNLFrank Dietrich, LLNL
Harm Wienke, BelgonucleaireHarm Wienke, Belgonucleaire
Roberto Capote, IAEA/NDSRoberto Capote, IAEA/NDS
Vienna, AustriaVienna, Austria
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com2
"Uncertainty and Target Accuracy Assessment for Innovative Systems Using Recent Covariance Data Evaluations", M Salvatores (coordinator), R. Jacquemin (monitor), Tech. Rep. NEA No. 6410 (2008).
OECD/NEA WPEC Subgroup 26 Final Report:
The request for improved cross sections and emission spectra and their accuracies for neutron induced reactions on 238U is an important issue that emerges in several of cases studied. High accuracy requirements were placed on inelastic cross-sections 238U(n,inl) in the whole energy range up to 20 MeV …
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com3
Dispersive coupled channels OMP
3/1
'
A
ZZCEE pp
Lane consistency
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com4
Dispersive and Lane consistent OMP (1)238U(p,el)
(deg.)30 60 90 120 150 180
d/d
(
b/sr
)
10-5
10-4
10-3
10-2
10-1
100
101
102
103
104
Hansen, Ep=20 MeV
Hansen, Ep=26 MeV
Takeuchi, Ep=65 MeV
RIPL 5409
65.0 MeV
26.0 MeV (x10)
20.0 MeV (x102)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com5
Dispersive and Lane consistent OMP (2)
RIPL 2409
RIPL 2409
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com6
Dispersive and Lane consistent OMP (3)
RIPL 2409RIPL 2409
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com7
Dispersive and Lane consistent OMP (4)
RIPL 5409 RIPL 5409
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com8
Dispersive and Lane consistent OMP (4)
RIPL 5409
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com9
0 50 100 150 200
-200
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
Koning-Delaroche (RIPL5405 for 208Pb)
Capote et al. (RIPL5408 for 238U)
Koning-Delaroche (RIPL5405 for 238U)
EXFOR experimental data 208Pb/natPb-0 EXFOR experimental data Th/Ure
act
ion
cro
ss s
ectio
n [m
b]
proton incident energy [MeV]
proton R on heavy nuclei
Dispersive and Lane consistent OMP (5)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com10
5 10 15 202.0
2.5
3.0
3.5
2.0
2.5
3.0
3.5
DCC OMP Soukhovistki et al. RIPL 2408 DCC OMP Capote et al. RIPL 2409 Exp.OMP Smith et al. RIPL 140 SM OMP Bauge et al. DCC OMP Romain-Duarte-Morillon
238U+nC
N f
orm
atio
n cr
oss
sect
ion
(b)
Neutron energy (MeV)
Flap-2 OMP 238U, ANL ang dist 232Th, ANL ang dist CSISRS, 238U
CN formation cross sections (1)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com11
5 10 15 202.0
2.5
3.0
3.5
2.0
2.5
3.0
3.5
DCC OMP Soukhovistki et al. RIPL 2408 DCC OMP Capote et al. RIPL 2409 Exp.OMP Smith et al. RIPL 140 SM OMP Bauge et al. DCC OMP Soft rotor
238U+nC
N f
orm
atio
n cr
oss
sect
ion
(b)
Neutron energy (MeV)
Flap-2 OMP 238U, ANL ang dist 232Th, ANL ang dist CSISRS, 238U
CN formation cross sections (2)
2%
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com12
2 4 6 8 10 12 14 16 18 200.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
octupolerot. bands
and
DCC OMP Capote et al. RIPL 2408 SM OMP Bauge et al. soft rotor, GS rotational band soft rotor, and rotational bands soft rotor, octupole rotational band
Neutron energy (MeV)
Inel
astic
cro
ss s
ectio
n (b
)
rot. bands
GSrot. bands
CN formation cross sections (3)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com13
CN formation cross sections (3)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com14
MSD (deformed and spherical SPLs)MSD (deformed and spherical SPLs) ENDF-B7.0, JEFF-3.1.1, JENDL-3.3ENDF-B7.0, JEFF-3.1.1, JENDL-3.3
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com15
Impact of MDS+MSC on CN formation
6 8 10 12 14 16 18 201000
1500
2000
2500
3000
3500
1000
1500
2000
2500
3000
3500
C
N fo
rmat
ion
cros
s se
ctio
n (m
b)
Energy (MeV)
R (Capote et al. - RIPL 2409)
R -
i (i=5 CC)
R -
i (i=5 CC) - MSD
R -
i (i=5 CC) - (MSD+MSC)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com16
NEW EMPIRE VERSION 3.0
Nuclear Data Sheets 110 (2009) ?? (accepted)
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com17
CONCLUSIONS• Existing state-of-the-art coupled-channels neutron OMPs
provide CN formation cross sections with small uncertainty (~3%) for En>4 MeV, more work needed for lower energies;
• improved neutron emission spectra (MSD+MSC) allow calculating the neutron inelastic scattering to the continuum;
• current evaluations of neutron inelastic scattering to be revised.
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com18
Dispersive and Lane consistent OMP (4)
238U(p,n)
(deg.)0 30 60 90 120 150 180
d /
d
(b/s
r)
10-5
10-4
10-3
26 MeV, Hansen (0+ + 2+ + 4+)RIPL 5409/2409 Lane cons.RIPL 5408/2408
PR C72 064610 (2005)
232Th(p,n)
(deg.)0 30 60 90 120 150 180
d /
d
(b/s
r)
10-5
10-4
10-3
26 MeV, Hansen (0+ + 2+ + 4+)
25.8 MeV, Schery (0+ + 2+ + 4+) RIPL 5409/2409 Lane consistentRIPL 4608/608 Th potential
PR C72 024604 (2005)
Viso=10 MeVWiso=23.5 MeV
Viso=15.9 MeVWiso=23.5 MeV
Viso=21 MeVWiso=29.4 MeV
2nd Int. Workshop On Compound Nuclear Reactions and Related Topics, Bordeaux, 5-8 October 2009
Roberto Capote, IAEA Nuclear Data Sectione-mail: R.CapoteNoy@iaea.org / Roberto.Capote@yahoo.com19
10 1000.00
0.01
0.02
0.03
Abfalterer et al data RIPL 2408 OMP Semim. OMP Bauge et al
[to
t(U-2
38
) - to
t(Th
-23
2)]
/
{[ to
t(U-2
38
) +
to
t(Th
-23
2)]
/2}
Energy [MeV]
Dispersive OMP