Highlights of physics

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Helsinki 17 September 2007
Highlights of physics from current facilities
Results from EURONS-supported projects carried
out at the TNA facilities
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TNA 01 GSI Darmstadt
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130Cd82 N 82 shell quenching or not
GSI
Support from earlier 130Cd82 data
- New
Data -
130Cd from the FRS_at_GSI on a stopper inside 15
EUROBALL clusters
A. Jungclaus et al., PRL, in press
No N 82 shell quenching in 130Cd !
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Pygmy-Dipole Strength - Neutron-Skin Thickness
and Asymmetry
GSI
Photoabsorption
LAND kinematically complete measurement of all
outgoing particles
124Sn
Secondary beam 132,130...Sn Coulomb excitation
at 500 MeV/u
130Sn
132Sn
Neutron-skin thickness
Properties of Neutron Stars

• LAND collaboration
• Klimkiewicz et al., subm. to PRL (2007)
• P. Adrich et al., PRL 95 (2005)

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TNA 2 UCL Louvain-la-Neuve
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UCL
Breakout from the hot CNO cycle18Ne(a,p)21Na
reaction
Discrepancy in the earlier Cross-section
measurements
New thin- 4He target measurements by employing
LEDA and 18Ne radioactive beams
Examined reaction protons at two energies, ECM
1.7 MeV and ECM 2.5 MeV
ECM 1.7 MeV, typical beam intensity 1.5 x 106
pps, data taken over 52.4 hours
ECM 2.5 MeV, typical beam intensity 4.5 x 105
pps, data taken over 75.6 hours


Josephides et al, Edinburgh University and CRC
Louvain-la-Neuve
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UCL
Destruction of 18F in Nova via 18F(p,a) reactions
19Ne states near the 18F p threshold studied
via 15O(a,a)

• Radioactive 15O (intensity 9.3 x 106 pps) beam
  on a thick 4He gas target

• Energy range of ECM between 2.0 3.2 MeV

R-Matrix calculation based on nominal values
(D.W.Bardayan et al., Phys. Rev. C70 (2004)
015804)
Data shown is of energy range 2.2 3.2 MeV

• Experimental data shows similar resonance
  structure to the R-Matrix calculation within
  energy region studied. A detailed analysis is
  currently in progress

Josephides et al, experiment conducted at CRC
Louvain-La-Neuve by an Edinburgh University, CRC
IPN, Orsay and The University of York
collaboration
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TNA 3 GANIL Caen
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Expérimental procedure
GANIL
N 28 shell closure in 42Si28 ?
48Ca (gt1012 pps) ? cocktail beam around 44S ?
Si isotopes g
Château de Crystal (e30)
44S ? 42Si
Secondary beams
SPEG (e100)
SISSI
48Ca ? 44S
42Si is a first nucleus of a second Isle of
inversion
B. Bastin et al. Phys.Rev.Lett. 99, 022503 (2007)
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New pathways to bypass the 15O waiting point
GANIL
Resonant Elastic Scattering
g.s.
H(15O,p)15O
16F
107 pps E 1.2 A MeV Resolution 4 keV
R-matrix analysis
New astro-reactions
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TNA 4 JYFL Jyväskylä
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K isomers in 254No
JYFL
208Pb(48Ca,2n)254No
JUROGAM
GREAT
RITU
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JYFL
High-accuracy mass measurements at JYFLTRAP
200 precise atomic masses of ground and isomeric
states.
Testing of the hypotesis of conserved vector
current Sub-keV precision on QEC-values for
superallowed beta decay.
Evolution of N50 shell gap.
Preliminary
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TNA 5 LNL Legnaro
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Shell closure evolution around N50
LNL
IRES-IPHC Strasbourg, University of
Paisley, University of Istanbul, IPNO Orsay,
GANIL, Ruder Boškovic Institute, INRNE Sofia,
INFN
PRISMACLARA
82Se238U _at_ E 505 MeV
The N 50 shell-gap survives
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Static quadrupole moments for coexisting
isomeric states in neutron deficient Pb nuclei
LNL
12 2 n state (spherical) 11- 2 p
particle 2p hole state (deformed)
NIPNE Bucharest, University of Bonn, IKS
University of Leuven, INRNE and University of
Sofia, INFN
28Si168Er and 29Si170Er _at_ E 143 MeV Er target
on a polycrystalline lattice of
Bi Time-Differential Perturbed Angular
Distribution TDPAD method
TDPAD spectra
Measured for the first time
Remeasured with an increased precision
This can be viewed as evidence for shape mixing
Average deformation ? ?2 0.146(14)
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TNA 7 KVI Groningen
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GT matrix elements for the 64Zn - (64Cu) 64Ni
double ß - decay
KVI
AGOR Cyclotron BIG BITE Spectrometer
EuroSuperNova detector system
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KVI
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TNA 8 ISOLDE CERN
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Post-accelerated isomeric beams!
ISOLDE
REX-Isolde
MINIBALL Ge - Array
68Cu Coulex
6-
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I Stefanescu et al, PRL 98 (2007) 122701
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ISOLDE
Parity non-conservation in nuclei 8 and 8-
states in 180Hf
Mass separated 180mHf polarized on a Fe foil at
7 mK NICOLE
E2/M2 mixing ratio of the 501 keV transition -
0.0324(16) In agreement with the earlier value
of - 0.030(2) , measured 30 years ago !
Anisotropy of the highly K- forbidden 501 keV
transition relative to 444 keV for B-field
alternatively up and down ?
J.R. Stone et al, PR C76 (2007) 025502
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Helsinki 17 September 2007
Analysis of large amount of data in progress ?
more highlights in the coming years