meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR
Download
Report
Transcript meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR
Nuclear Astrophysics
in NPI ASCR Rez, Czech Republic
Outline:
Hardware
Indirect methods
Experiments
Collaborations
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
U120M cyclotron
basic data
Isochronous cyclotron
built in Dubna
First run in 1977
Number of upgrades
Harmonic coils
Monochromator
Axial injection
Negative ions
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
U120M cyclotron
parameters
Beams:
p 10-25 MeV
d 10-20 MeV
3He 17-53 MeV
alpha 20-40 MeV
5uA (H- 40uA 38MeV)
5uA (d- 25uA)
2uA
5uA
Beams
radiopharmacy
N.A. experiments
neutron generator
activation experiments
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
U120M cyclotron
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
U120M cyclotron
beamline
Monochromator magnet
Three experimental lines
Amos – achromatic magnetooptical
system system for zero-angle
measurements
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
U120M cyclotron
targets
Solid isotopicaly enriched targets
14C (225, 295, 400 ug/cm2)
13C (395 ug/cm2)
meeting – Prague, June 2011
Gas target chamber
15N, 17O,18O, 20Ne gases
...
Jaromir Mrazek, NPI ASCR Rez
Nuclear astrophysics in NPI ASCR
indirect methods
Indirect methods
ANC method
Trojan Horse method
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Nuclear astrophysics in NPI ASCR
ANC method
Indirect methods
ANC method
Method of Asymptotic Normalization Coeficients was
developed and tested in cooperation with Texas A&M
University. The first test of ANC method performed
at NPI ASCR Rez using 16O(3He,d)17F
Phys Rev C56 (1997) 1302
Phys Rev C59 (1999) 1149
Few-Body Syst.Suppl. (2000)102
Czech J.Phys 54 (2001)
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
ANC method
principle
direct radiative capture from
- transfer reaction
the radial overlap function and
DWBA cross section:
For peripheral reaction:
C is ANC
b is S.P.ANC
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
ANC method
While spectroscopic factors depend on the potential geometry
factors, ANC (from a peripheral transfer) depend at most weakly
on potential geometry.
Cross sections of astrophysical direct radiative capture reactions
(p, ) or (n, etc... are related to ( C )2
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Astrophysical
experiments
ANC measurements at NPI ASCR Rez
•9Be + p 10B
• 12C + p 13N
• 13C + p 14N
• 14N + p 15O
• 16O + p 17F
• 15N + p 16O
• 14C + n 15C
• 18O + p 19F
•20Ne + p 21Na
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Trojan Horse Method
priciples
Binary reaction via three-particle reaction
beam energy
detection angle
good TH projectile
quasifree condition
complete kinematics
U120M's Trojan Horses 2H, 3He
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Recent experiments in NPI ASCR
New astrophysical S factor for the 15N(p,gamma)16O
- CN cycle transform to CNO II, CNO III
- dominated by resonant capture to g.s. through two J=1- res.
S(0)=36.0 (6.0) keV b (LUNA: S(0)=39.6 - PRC82, 55804 (2010))
rate of leak from CN cycle - one in every 2200 (300) (previously 1200)
A.M.Mukhamedzhanov et al., Phys.Rev.C78, 015804 (2008)
A.M.Mukhamedzhanov et al.,Phys.Rev. C83, 044604 (2011)
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Recent experiments in NPI ASCR
Trojan horse particle invariance studied with the 6Li(d,alpha)4He and 7Li(p,alpha)4He
- the PWA approach is valid
-THM is independent on a spectator particle
R.G.Pizzone et al., Phys.Rev.C83, 045801 (2011)
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Recent experiments in NPI ASCR
Low-energy d+d fusion reactions via the Trojan Horse Method
A.Tumino et al., Phys.Lett.B 700 (2011)111
2H(d,p)3H
2H(d,n)3He
S(0)=57.4 (1.8) MeVb
S(0)=60.1 (1.9) MeVb
-Big Bang Nucleosynthesis
-Pre-Main Sequence stars
-future fusion reactors
Bare nucleus
reaction rates change by >15%
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
LEA NuAG
Associated laboratory – Nuclear Astrophysics and Grids
Four years project of virtual laboratory
support the contacts between the parties and
benefit from synergies in common topics
SPIRAL 2 construction and access
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
LEA NuAG
Associated laboratory – Nuclear Astrophysics and Grids
Hot burning cycles: an interesting isotope 14O
experiment : production in
3He(12C,n) on U120M
14O(alpha,p)
experiment in
GANIL 2011/06
target station construction
for SPIRAL 2 (AFAC) - 14O
prod.
meeting – Prague, June 2011
A.Pichard et al., EPJA (2011) 47, 72
Jaromir Mrazek, NPI ASCR Rez
LEA NuAG
Associated laboratory – Nuclear Astrophysics and Grids
SPIRAL2 / NFS
activation - excitation functions for IFMIF / ITER
U120M E up to 20MeV, S2/NFS E up to 40MeV
d
d
irradiation chamber + pneumatic system (+KIT)
d-breakup contribution to the reactions (+INFN HH Bucharest)
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Support
project of MŠMT(CR) – LH 11001
Asymptotic Normalization Coefficients and Trojan Horse Methods in
Nuclear Astrophysics.
by grant of GAČR P203/10/0310
Astrophysical Nuclear Reactions and Further Development of the
Indirect Methods
by Centrum of Nuclear astrophysics and Nuclear Physics (MED)
by ASCR -
Program of internal support of international projects
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez
Collaborators
NPI ASCR (CR) : P.Bém, V.Burjan, Z.Hons, V.Kroha, M.Majerle,
J.Mrázek, J.Novák, Š.Piskoř, E.Šimečková
TAMU (USA) : C.A.Gagliardi, A.M.Mukhamedzhanov, A.Sattarov,
X.Tang, L.Trache, R.E.Tribble
INFN-LNS (Italy) : M.LaCognata, L.Lamia, R.G.Pizzone, S.Romano,
C.Spitaleri, S.Tudisco, A.Tumino, S.Cherubini, M.L.Sergi
INF Debrecen (Hungary):Z.Fülop,E.Somorjai,G.Kiss
GANIL (France) F.d.Oliviera-Santos, M.Lewitowicz, M.G.Saint-Laurent,
G.Lhersonneau
meeting – Prague, June 2011
Jaromir Mrazek, NPI ASCR Rez