Slides

Report
Institut de Physique Nucléaire-Orsay
UMR8608
Faical Azaiez
Aldo and his camera…..
Le first and largest nuclear physics lab in France
(Founded in 1956 par F.Joliot Curie)
3
~ 360 members
~22000 m2
~ 160 publications/year
4
Visit of G. Fioraso, Minister of research and higher education,
(November 2012)
5
1960-1970
the golden era for ISOL @ Orsay
1957
1958
SC: 160 MeV Proton
1960
The SC Became 40 years later the Orsay proton therapy center
7
Target Ion-Source and ISOCELE
(R. Bernas -1965)
ALTO:
The Tandem and the e-driven ISOL facility in Orsay
PAC:
Two entangled stable and radioactive installations within a unique facility
- R. F. CASTEN , Chair (Yale University)
- E. BALANZAT (CIMAP – Caen)
- D. BALABANSKI (Sofia – Bulgarie)
- S. GREVY (CENBG)
- E. KHAN (IPNO)
- P. REITER (Univ of Coogne)
- B. RUBIO (IFIC Valencia)
- C. TRAUTMANN (GSI)
- A. TUMINO (LNS -Catania)
- J. C. THOMAS (GANIL)
--P. REGAN (Uni of Surrey)
The ALTO facility
hours of scheduled beam
licence
March 2012
green light from French nuclear
safety authorities
May 13th 2013 – formal inauguration
ORGAM: the Orsay Gamma Array
2012
13 BGO + 13 EUROGAM Phase 1 Ge
2013
~20 detectors + Loan Pool
Oups plunger
“Development of the Time Dependent Recoil In-Vacuum
technique for radioactive-beam geometry”
(G. Georgiev, CSNSM Orsay, France)
0 to 20 mm distance targetdegrader
“Probing the boundary of shape coexistence south of Z=82:
Lifetime measurements of excited states in 170Os”
(J. Ljungvall, CSNSM Orsay, France)
“Search for X(5) symmetry in 168W”
(K. Gladnishki, University of Sofia, Bulgaria)
g~0.57 ±
0.02
24Mg
2+
2
+
4
+
6
+
170Os
8+
A Kusoglu
Univ Istanbul
“Superdeformed Shell Structure in A~40 Nuclei”
(E. Ideguchi, University of Osaka, Japan)
A Goasduff
CSNSM
Silicon Ball
2014: ORGAM & Silicon Ball: the Orsay Gamma Array
Super-deformation in 35,36S and 40Ar via 18O + 26Mg → 44Ca*
41+→21+
1431 keV
40Ar
21+→0gs+
1461 keV
40Ar
Counts [A. u.]
35S 1/2+→3/2 +
gs
1572 keV
2p gate
2α gate
Ge energy [keV]
Analysis in progress
by S Go (University of Tokyo)
MINORCA: Miniball at Orsay coupled to Orgam
15-20 coax Ge
+ 8 Miniball triple clusters
with addback
Efficiency at 1332 keV: 8.1%
J Ljungvall, CSNSM Orsay
Oups plunger, segmented particle detector, ...
possibility of installing a large number of LaBr3 detectors
Up to 24 weeks of beam time available for the 2014 campaign
Minorca: Miniball at Orsay coupled to Orgam
g factor measurements of short-lived states towards the Island of Inversion: 26Mg and 28Mg
(G. Georgiev – CSNSM)
Shape coexistence in 74Se studied through complete low-spin spectroscopy
after Coulomb excitation (M. Zielinska – CEA Saclay)
Search for X(5) symmetry in 78Sr (K. Gladnishki – University of Sofia)
Lifetime Measurement of 100Ru: A possible candidate for the E(5) critical point symmetry
(T. Konstantinopoulos – CSNSM)
Lifetime measurements in 113Te: Determining optimal effective charges approaching
the N=Z=50 doubly-magic shell closure (D. Cullen – University of Manchester)
Measurement of octupole collectivity in Nd, Sm and Gd nuclei using Coulomb excitation
(P. Butler – University of Liverpool)
Single-particle structure in the second minimum. Search for high-K bands above
fission isomers (G. Georgiev – CSNSM)
Spectroscopy of the neutron-rich fission fragments produced in the
(J. Wilson – IPN)
~80 days beam time requested
238U(n,f)
reaction
LICORNE: Lithium Inverse Kinematic Orsay Neutron Source
CH target
γ
Focused intense
mono-energetic
neutron source:
107 n/s/sr
0.5 < En < 4 MeV
n
n
n
Time of flight TOF (ns)
100 nA 7Li
13-17 MeV
n
γ
irradiated sample
2.8 MeV
neutrons
700 keV
7Li+12C
evaporated neutrons
Pulse Shape Analysis (PSA)
P Halipré, PhD thesis
Spectroscopy of neutron-rich fission fragments produced in 238U(n,f)
Spectroscopy of neutron-rich
fragments of 40<Z<50 (A Gottardo)
Neutron-rich nuclei around
and beyond 132Sn (R Lozeva)
Shape coexistence and
collectivity around N=60
(A Dijon)
Evolution and collectivity development in
the vicinity of 78Ni (D Verney)
The Split Pole spectrometer and nuclear astrophysics
SPLIT POLE
15 MV MP Tandem
● 2010-2011 rejuvenation
● 2012, 5 experiments
● 2013, 6 experiments
 nuclear structure (20%)
 nuclear astrophysics (80%)
split-pole spectrometer
maximum magnetic rigidity : 1.65 Tm
maximum solid Angle : 4 msr
energy resolution E/DE~2000
focal plane detectors :
proportional counter : energy loss DE + localization
plastic : residual energy E
(+ time of flight if pulsed beam)
Split-pole
πf7/2 strength distribution in 69Cu
Transfer reactions:
70Zn(d,3He)69Cu, P Morfouace
70Zn(14C,16O)68Ni, I Stefan
more foreseen for 2014
36S(d,p) & 36S(14C,16O)
O Sorlin & T Roger
Orsay
Ganil
Physics with the Tandem beams
The Split Pole spectrometer and nuclear astrophysics
Low Energy Radioactive Ion Beams at ALTO
electron linac
10 µA, 50 MeV
target & ion source
5 x 1011 photofissions /s
Secondary beam lines
Parrne mass separator
RIALTO: Resonant laser Ionisation at ALTO
Mezzanine of the mass separator/RIB zone
Nd:Yag pump laser (532 nm, 90 W)
2 dye lasers (540-850 nm, 8W @ 30W pump,
10 ns pulse width, 3 GHz line width)
BBO doubling units (270-425 nm, >100 mW)
RIALTO: Resonant laser ionisation at ALTO
First step
2011, 2012: Gallium with two
ionisation schemes
2013: Zinc with frequency tripling
2014: Off-line chamber for
development of laser schemes
Second step
R. Li, D. Yordanov, IPN Orsay
V. Fedosseev, T. Day Goodacre, B. Marsh, Isolde
K. Flanagan, University of Manchester
T. Kron, K. Wendt, University of Mainz
Low Energy Radioactive Ion Beams at Alto
Parrne mass
separator
Identification
station
(existing)
TETRA
(2014)
BEDO/TETRA(exis
ting)
BEDO: Beta decay at Orsay
Bedo setup
in neutron mode
Dubna neutron
detector Tetra
Bedo setup
in gamma mode
4 small Exogam
clovers
fast timing
B Roussière
LaBr3
Ge
LaBr3
up to 5 Ge detectors ε = 5-6%
4π β trigger
BGO anti-Compton
~90 3He tubes
borated polyethylene shielding
Physics with BEDO @ ALTO
beta-decay spectroscopy in the N=50 region
As82
Ge79
Ge80
Ge81
Ga79
Ga80
Ga82
Ga83
Zn81
Zn82
Present limit of structure knowledge
(at least few excited states are known)
hot plasma ionization
(1 µA deuteron primary beam)
O. Perru PhD – def. 10th December 2004
Eur. Phys. J. A 28, 307 (2006)
surface ionization
(2-4 µA electron primary beam)
M. Lebois PhD – def. 23th September 2008
PRC 80, 044308 (2009)
B. Tastet PhD – def. 13th May 2011
PRC 87, 054307 (2013)
Ge85
Ge86
D. Testov PhD – def. 17th January 2014
Ga84
Ga85
laser ionization
(10 µA electron primary beam)
K. Kolos PhD – def. September 2012
PRC 88, 047301 (2013)
hot plasma ionization
(1 µA deuteron primary beam)
PRC 76 (2007) 054312
laser ionization
To be done in march 2014 (PhD A. Etile CSNSM)
TETRA: Beta-delayed neutron emission
83As
84As
T1/2=13.4 s
T1/2=4.2 s
βn
83Ge
84Ge
T1/2= 1.85 s
T1/2=0.954 s
βn
N=50
Pn=10.2(9)%
B Pfeiffer et al
84Ga
T1/2=0.085s
Pn=49.8(4)%
this work
4π neutron detector of
90 3He counters ε = 63%
4π beta detector
1 Ge detector
D Testov, PhD thesis
In the coming 3 years: three more beam lines
Parrne mass
separator
Identification
station
(existing)
TETRA
(2014)
POLAREX(pr
oject)
TAS
(project)
BEDO/TETRA(exis
ting)
SPECOLOR
(project)
ALTO is the first ISOL machine based on
photo fission operated in the world
and one of the few presently running
ISOL facilities in Europe
JYFL Jyväskylä
low energy RIBs
ALTO Orsay
SPIRAL Caen
post-accelerated
RIBs
ISOLDE
CERN
Will be paving the road to SPIRAL2 and SPES…..
The ALTO facility: one possible future
Electron scattering on neutron rich nuclei…. (p and n density far from stability)

similar documents