first results of reactions induced by exotic beams in the region of 11 be with chimera array
DESCRIPTION
EURORIB'10 - Lamoura , Jura, France June 6 th -11 th 2010. First results of reactions induced by exotic beams in the region of 11 Be with CHIMERA array. L. Grassi – INFN, Sezione di Catania Università degli Studi di Catania. OUTLINE. Fragmentation beams at LNS - PowerPoint PPT PresentationTRANSCRIPT
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First results of reactions induced by exotic beams in
the region of 11Be with CHIMERA array
EURORIB'10 -Lamoura, Jura, France June 6th -11th 2010
L. Grassi – INFN, Sezione di CataniaUniversità degli Studi di Catania
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OUTLINE
Fragmentation beams at LNS
Chimera characteristics and detection techniques
Tagging system
First experiments with 13C, 16O, 18O primary beams at 55 MeV/A
Kinematical coincidence technique and its capabilities
Preliminary and incoming results
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Fragmentation beams at INFN-LNS in Catania
Production Target
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Si CsI(Tl)
TOF-EΔE-E
PSD CsI
TOF
40Ar+Pety 20 MeV·A
E (M
eV)
Rise Time (ns)
Z=2
Z=6
Z=10
124Sn+64Ni 35 MeV·Aθ=10°
PSD Si
CHIMERA Detection TechniquesDE
(MeV
)
TOF(channel)
Z=10
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Fragmentation Beams Tagging System
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Tagging System test with a-source
By using coincidences between MCP and one pixel in the silicon detector, we obtain a time resolution better than 500 psec
At the entrance of the CHIMERA scattering chamber, we mounted a-source, MCP and DSSSS (16x16 strips, thickness 140 mm).The base of flight is 70 cm
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Fragmentation beams on CHIMERA: 11Be - 12B setting
13C primary beam 9Be target (1,5 mm thickness ) at 55 MeV/A
11Be 10 kHz
11Be
8Li6He
12Be
9Li
10Be
7Li4He
DE (M
eV)
TOF (ns)
9Be8Li
4He
12B
10Be
7Li
11B13B
DE (M
eV)
TOF (ns)
12B 80 kHz
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18O primary beam
magnet setting on 11Be
strip 140 mm thick
Fragmentation beams on CHIMERA: 18O - 16O primary beams
11Be 3 kHz
16C
13B
10Be
7Li
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11Be10Be
8Li6He
charge12
3
4
5
mass
10
11Z=4
Fragmentation beams on CHIMERA: identification test
DE(c
h)DE
(MeV
)
T (ns)
Si- CsI(Tl)DE-E
Tel 66 4.1°
DSSD MCP DE/TOF
13C primary beam at 55 MeV/A
E (ch)
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11Be
8Li6He
12Be10Be
7Li4He
DE
(MeV
)
TOF (ns)
11Be
Tagged beam Target p
p
transfer reactions study induced on proton and deuteron targets
CHIMERA 4p multidetector kinematical coincidence
kinematical coincidences technique
10Be
d
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Tel 802 (q=58°) Silicon energy
Method capability with the reaction 7Li+p at 52 MeV
Tel 802 (q=58°) Silicon energy
0
20
40
60
80
100
120
140
116 118 120 122 124 126 128 130qcm
7Li+p-->p'
0.47 MeVaverage
ds/dw
(arb
.un.
)
Df=180°
kinematical coincidence technique
Tel 117 (q=6.4°) Silicon energy
Tel 117 (q=6.4°) silicon energy
E7L
i (M
eV)
Ep (MeV)
7Lip
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CHIMERA detects charge particlesneutrons make some reactions inside CsI producing g, p, a
It is very interesting to see the reaction
Tel 117 (q=6.4°) silicon energy Tel 624 (q=25.5°) CsI(Tl) energy
Df=180°
p(7Li,7Be)n
kinematical coincidence technique
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E(channel)
DE(c
hann
el)
E(channel)
Kinematical coincidences – preliminary results
elastic12B+d
Coincidences between telescopes with Df=180°Tel 38(3.1°) - 870(66°)
Tel 38(3.1°)Target CD beam setting on 12B
E(channel)
DE(c
hann
el)
Tel 38(3.1°)-875(66°) Df=215°
E(channel)
DE(c
hann
el)
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16C excite state 1.7 MeV
E(channel)
16C+dRing 2I (3.1°)
coin withring 15(74°)ring 14 (66°)
10Be+pRing 2I (3.1°)
coin withring 15(74°)ring 14 (66°)
16C+d Ring 2E(4.1°)
coin withring15 (74°)ring 14(66°)
Kinematical coincidences – preliminary results
E(channel)
E(channel)
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Transfer reactionsB. B. Back et al.,
PHYSICAL REVIEW LETTERS 104, 132501 (2010)
V. Lapoux et al, PHYSIC LETTERS B 658 (2008) 198-202
J.S. Winfield et al.Nuclear Physics A 683 (2001) 48–78
35.3 MeV/A
6,2 MeV/A7,4 MeV/A
Transfer reactionsp(11Be, 10Be)d at 48 MeV/Ad(10Be, 11Be)p at 58 MeV/A
d(12B, 11Be) 3He at 47 MeV/Ap(13B, 11Be) 4He at 52.4 MeV/A
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Angular distribution
Elastic scattering (~ 50 MeV/A)
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CONCLUSION• Trough kinematical coincidence we’re going to study transfer reactions with light exotic beams• On June 2010 we’ll have also beam 9Li on 5.5 MeV/A by LNS-EXCYT facilities• Next improvement to detect particles at 0°• New experiments by using fragmentation beams at LNS (primary beam 36Ar to produce 32,33Ar neutron poor beams)• Exotic beams delivered by SPES at LNL.
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F.AMORINIa, A.ANZALONEa, L.AUDITOREb, G.CARDELLAc, S.CAVALLAROa,d, M.B.CHATTERJEEe, E.DE FILIPPOc, E.GERACIc,d, L.GRASSIc,d, A.GRZESZCZUKi,
P.GUAZZONIl, J.HANa, E.LA GUIDARAc,f, G.LANZALONEa,f, I.LOMBARDOa,d, S.LO NIGROc,d, D.LORIAb, C.MAIOLINOa, M. PAPAc ,A.PAGANOb, S.PIRRONEc, G.POLITIc,d, F.PORTOa,d,
F.RIZZOa,d, E.ROSATOm, P.RUSSOTTOa,d, A.TRIFIRÒb, M.TRIMARCHIb,G.VERDEc, M.VIGILANTEm, L.ZETTAl
(a) INFN - Lab. Nazionali del Sud, Catania, Italy; (b) INFN - Gruppo collegato di Messina and Dipartimento di Fisica, Università di Messina, Italiy; (c) INFN - Sezione di Catania, Italy; (d) Dip. di Fisica e Astronomia, Università di Catania, Italy; (e) Saha Institute of Nuclear Physics, Kolkata,
India; (f) CSFNSM, Catania, Italy;(g) Università Kore di Enna, Enna, Italy; (h) Institute de Physique Nucleaire d'Orsay, CNRS-IN2P3, Orsay Cedex, France; (i) Institute of Physics, University of Silesia, Katowice, Poland; (l) INFN - Sezione di Milano and Dipartimento di Fisica, Università di Milano, Itally; (m) INFN - Sezione di Napoli and Dipartimento di Fisica Università Federico II, Napoli, Italy
EXOCHIM collaboration