meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Nuclear Astrophysicsin NPI ASCR Rez, Czech Republic

Outline:

HardwareIndirect methodsExperimentsCollaborations

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

U120M cyclotronbasic 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 cyclotronparameters

Beams: p 10-25 MeV 5uA (H- 40uA 38MeV) d 10-20 MeV 5uA (d- 25uA) 3He 17-53 MeV 2uA alpha 20-40 MeV 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 cyclotronbeamline

Monochromator magnet

Three experimental lines

Amos – achromatic magnetooptical system system for zero-angle measurements

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

U120M cyclotrontargets

Solid isotopicaly enriched targets 14C (225, 295, 400 ug/cm2) 13C (395 ug/cm2)

Gas target chamber15N, 17O,18O, 20Ne gases ...

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Nuclear astrophysics in NPI ASCRindirect methods

Indirect methods ANC method Trojan Horse method

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Nuclear astrophysics in NPI ASCRANC 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 methodprinciple

direct radiative capture from - transfer reaction

the radial overlap function and DWBA cross section:

For peripheral reaction:C is ANCb 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

•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

Astrophysical experiments

ANC measurements at NPI ASCR Rez

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Trojan Horse Methodpriciples

U120M's Trojan Horses 2H, 3He

Binary reaction via three-particle reaction

beam energy

detection angle

good TH projectile

quasifree condition

complete kinematics

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Recent experiments in NPI ASCR

New astrophysical S factor for the 15N(p,gamma)16O

A.M.Mukhamedzhanov et al., Phys.Rev.C78, 015804 (2008)A.M.Mukhamedzhanov et al.,Phys.Rev. C83, 044604 (2011)

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)

- CN cycle transform to CNO II, CNO III- dominated by resonant capture to g.s. through two J=1- res.

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

R.G.Pizzone et al., Phys.Rev.C83, 045801 (2011)

- the PWA approach is valid-THM is independent on a spectator particle

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

Recent experiments in NPI ASCR

A.Tumino et al., Phys.Lett.B 700 (2011)1112H(d,p)3H S(0)=57.4 (1.8) MeVb2H(d,n)3He S(0)=60.1 (1.9) MeVb

Low-energy d+d fusion reactions via the Trojan Horse Method

-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 NuAGAssociated 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 NuAGAssociated laboratory – Nuclear Astrophysics and Grids

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. A.Pichard et al., EPJA (2011) 47, 72

Hot burning cycles: an interesting isotope 14O

meeting – Prague, June 2011 Jaromir Mrazek, NPI ASCR Rez

LEA NuAGAssociated laboratory – Nuclear Astrophysics and Grids

SPIRAL2 / NFS activation - excitation functions for IFMIF / ITER

U120M Ed up to 20MeV, S2/NFS E

d up to 40MeV

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