Nuclear structure and reactions @IN2P3 Selected Higlights

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Nuclear structure and reactions _at_IN2P3Selected
Higlights
Shell evolution and nuclear interactions Reaction
s with weakly bound nuclei Nuclear
Astrophysics Heavy and SHE Nuclear
symetries Fundamental interactions Nuclear
collisions / phase transition
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Shell evolutions and NN interactions

• Disappearence of the N28 shell closure
• N16 shell gap and the location of continuum
• Neutron proton interactions in 92Pd
• Two proton radioactivity
• Physics/status _at_ ALTO

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5 Physical Review Letters, 1 Physical Review C
1 TOP 1 , 1 TOP 10 most quoted papers
(GANIL, IPNO, LPC Caen, IPHC Strasb)
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UK labs IPN Orsay, GANIL, LPC Caen from IN2P3
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92Pd spectroscopy using EXOGAM-Nwall-DIAMANT

• EXOGAM 11 Clovers with partial shield. eg 10
  for Eg1.3 MeV

• DIAMANT 80 CsI(Tl) dets. ep or a 66

• The Neutron Wall 50 liquid scintillator
  detectors. e1n 23

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92Pd
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Future plans _at_ GSI
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ALTO _at_ Orsay
increase of intensity coming soon
Achievements published so far Beta-decay
spectroscopy of N50 nuclei (D. Verney IPNO)
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Reactions with weakly bound nuclei

• Fusion with 6,8He
• Nuclear break up with 6He

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Neutron correlations, quantum tunneling in weakly
bound nuclei
Chatterjee, Navin et al. PRL 101, 032701 (2008)
Di-neutron config. also in Nuclear break-up of
6He (Assié, Scarpaci IPNO, D. Lacroix GANIL)
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Nuclear astrophysics

• Study of 13C(a,n) for AGB stars
• Study of 18F destruction in novae
• Study of 60Fe destruction in supernovae
• Incompressibility of nuclear matter with N/Z
  ratio

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Heavy and superheavy elements

• Study of Nb, Fm nuclei
• The cluster structure of 212Po
• Probing Z120 stability from fission times

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Spectroscopy of SHE
253No,256Rf K isomers _at_ Dubna, ANL 246Fm,254No
Fission barrier and dynamics _at_ JYFL, ANL CSNSM
Orsay, IPHC Strasb from IN2P3
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VIVITRON EUROGAM
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Blocking technique evidence for long times at
Z120
treac lt tmin(thermal vibrations) ? cmin ? 0.1
tmin ? 10-18 s
INDRA, Collab IPNO, GANIL, IPNL
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D. Jacquet (IPNO), M. Morjean (GANIL) et al.
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Symmetries in nuclei

• Phase transition in A100 nuclei
• Tetrahedral shapes

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Fundamental interactions
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Shell effects in SHE by means of fission
times Modelling fusion and fission Experimenta
l study of fission of transuranium Fundamental
applied (VAMOS Gedepeon, Euratom)

• Isospin dependence of symmetry energy
• - Production of superheavy nuclei

Modeling of multinucleon transfer
Collabs GANIL, IPNO, IPNL INDRA detector
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• This was not a fully inclusive presentation !

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Study of nuclear stopping in central collisions

• Stopping systematics for central collisions of
  symmetric systems
• INDRA_at_GANIL,GSI

INDRA and ALADIN collaborations (G. Lehaut et
al.), Phys. Rev. Lett. 104, 232701 (2010)
Isotropy/Stopping
Below Fermi energy stopping (isotropy) decreases
Above Fermi energy stopping depends on system
size
IN-MEDIUM NUCLEON-NUCLEON COLLISIONS
MEAN FIELD
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A broad resonance influencing the 18F destruction
in novae
Dalouzy et al. PRL 102 (2009) 162503
Proton energy distribution
Broad resonance in 19Ne
18F(p,g)19Ne
½
18F main source of g radiation in novae Destroyed
mainly by 18F(p,g)19Ne reaction Use
19Ne(p,p)18F(p) at LLN
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(4)
2
D1S Gogny HFB calculation GCM ? Bohr dynamics
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VAMOS
(b)
20O(d,p)21O
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(a)
Ed (MeV)
g.s.
5
6
4
4
DE (MeV)
2
3
E1.2 MeV
2
40
60
100
120
80
140
160
Angle (deg)
MUST2
1
2.5
2.4
2.6
2.2
2.3
A/Q
20O(d,t)19O
20O(d,pn)20O
Et (MeV)
Preliminary B. Fernandez
3/2
(3/2)
(c)
10
30
40
20
Angle (deg)
Energy MeV
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Collab IPHC, IPNO, IPNL,