The Alto facility
S Franchoo
IPN Orsay

The Alto facility
Alto takes central place at IPN
TNA within ENSAR

March 2012:
operating licenceMay 2013:
Alto Workshop

The Alto facilityTNAhours of scheduled beam

licence
PAC policy &new instrumentation
contribution toSpiral-2
strong localcommitment

The Alto facility

50 MeV

15 MV

360 staff members
250 outside users (30 countries) /yStable beams
3928 h /y
25% light ion beams 984 h
75% heavy ion beams 1964 hRIB
360 h /yThe Alto facility

Nuclear Reactions:
Bacchus

NuclearAstrophysics:
Split-Pole
ISOL beams:
β-decaylaser spectroscopy…

Neutronsource:LicorneGamma
spectroscopy:
Orgam & Minorca
ClustersOrgam: the Orsay Gamma ArrayI Matea et al2012
13 BGO + 13 EUROGAM Phase 1 Ge

2013
~20 detectors back from Warsaw + 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 distancetarget-degrader“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=0.56(1)

4+

Mg 2+

242+6+

170

8+A Kusoglu
Univ Istanbul“Superdeformed Shell Structure in A~40 Nuclei”(E. Ideguchi, University of Osaka, Japan)

OsA Goasduff
CSNSM

Silicon Ball

Orgam & Silicon Ball: the Orsay Gamma Array
E Ideguchi & D Suzuki et al
Super-deformation in 35,36S and 40Ar via 18O + 26Mg → 44Ca*

40

Ar 41+→21+
1431 keV40

Ar 21+→0gs+
1461 keVCounts [A. u.]35

S 1/2+→3/2gs+1572 keV

2p gate2α gateGe energy [keV]

Analysis in progress
by S Go (University of Tokyo)

Minorca: Miniball at Orsay coupled to Orgam
I Matea & G Georgiev et al15-20 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
I Matea & G Georgiev et alg 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 238U(n,f) reaction(J. Wilson – IPN)

~80 days beam time requested

Licorne: Lithium Inverse Kinematic Orsay Neutron Source
J Wilson et alCH targetγ

Focused intensemono-energetic
neutron source:
107 n/s/sr0.5 < En < 4 MeVnnn

Time of flight TOF (ns)

100 nA 7Li
13-17 MeVnγirradiated sample

E1=2.8 MeV
neutrons
E2=700 keV

Li+12Cevaporated neutrons
7Pulse Shape Analysis (PSA)

P Halipré, PhD thesis

Spectroscopy of neutron-rich fission fragments produced in 238U(n,f)
J Wilson et alSpectroscopy of neutron-richfragments of 40<Z<50 (A Gottardo)
Neutron-rich nuclei around andbeyond 132Sn (R Lozeva)

Shape coexistence andcollectivity around N=60(A Dijon)
Evolution and collectivity development in
the vicinity of 78Ni (D Verney)

Split-pole
I Stefan et al71

Zn(d,3He)69Cu pickup reaction

1.65 Tm magnetic rigidity
4 msr solid angle
E/∆E~2000 resolution
proportional counter & plastic ∆EE focal plane detectors

Transfer reactions...
70
Zn(d,3He)69Cu, P Morfouace70
Zn(14C,16O)68Ni, I Stefan
more foreseen for 2014
36
S(d,p) & 36S(14C,16O)
O Sorlin & T Roger... and nuclear astrophysics

He3

θ=21°

Single-particle strength in neutron-rich copper
P Morfouace et al

resolve ambiguities from literature
direct kinematics reference measurement for Ganil RIB experiment
Orsay
πf5/2

Ganil

πf7/2

Nuclear astrophysics
N De Séréville, F Hammache et alAl(n,p)26Mg and 26Al(n,α)23Na in massive stars

26

Low Energy Radioactive Ion Beams at Alto
D Verney et al
Split-pole
Bacchus
LicorneOrgam &MiniballIsolproductionI cave
Sin OLstal
lationIsolmass separator andlow-energy RIB lines

e LINACcluster,molecular &droplets beams

Radioactive beam lines
Stable beam w/o spectrometer
Stable beam with spectrometer

Low Energy Radioactive Ion Beams at Alto
D Verney et alelectron linac
10 µA, 50 MeV

target & ion source
5 x 1011 photofissions /sSecondary beam lines

Parrne mass separator

UCx development, C Lau et al
Fluorination of lanthanides, B Roussière et al
Higher yields: increase UCxdensity up to 13 g/cm3
Control porosity
Reduce pellet thickness

B Hy et al., NIM B 288 (2012) 34

Ensar Actilab: IPN, Cern, CMMO,Ganil, INFN, Univ Rennes

accelerate release of Ln and otherchemically reactive elements throughfluorinated molecular beams
Ensar2: IPN, Cern, Ganil, GSI, INFN

Physics: B(E2) through fast timing
test case 137,139Cs
B Roussière et al, EPJA 47 (2011)

IPN, CSNSM, INRNE-Sofia,
Tandar-Buenos AiresRialto: Resonant laser ionisation at AltoS Franchoo et al
Mezzanine of the mass separator/RIBzone

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 AltoS Franchoo et alFirst step

2011, 2012: Gallium with twoionisation 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

Parrnemass
separator

Identification
station(existing)
TETRA(2014)

POLAREX(project)
TAS(project)
BEDO/TETRA(existing)
LINO(project)

Low Energy Radioactive Ion Beams at Alto
Physics Case
Observable

Experimentaltechnique

Energy level
patternβγ−spectroscopy

Electromagnetictransitions

Electron conversionδ<r2>, µ, Q

Laser spectroscopy

T1/2 of excited levels,B(M1), B(E2)

Fast timing

Pn, P2n and T1/2

Neutron detection

Physics case

Evolution of N=50 near 78Ni
and N=82 near 132Sn
shell effects far from stability
Onset of collectivity andnature of correlations

Gross properties, shell modelg-factor and spin

Nuclear orientation

γ emission

Total absorption
spectrometer

Decay heat in reactors

Bedo: Beta decay at Orsay
D Verney et al
Bedo setup
in neutron mode
Dubna neutron
detector Tetra

Bedo setup
in gamma mode
4 small Exogamclovers

fast timing
B Roussière

LaBr3Ge
LaBr3
up to 5 Ge detectors ε = 5-6%4π β trigger
BGO anti-Compton~90 3He tubes
borated polyethylene shieldingTetra: Beta-delayed neutron emission
Y Penionzhkevich & D Verney et al83

AsT1/2=13.4 s

84

AsT1/2=4.2 s

βn83

GeGe

84

T1/2= 1.85 s T1/2=0.954 s

N=50βnPn=10.2(9)%B Pfeiffer et alGa84

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

Tetra and Bedo in alternating mode

TETRA

dipole off: towards Tetra

BEDO

dipole on: towards Bedo
Collaboration IPN
Orsay - FLNR Dubna

Tetra and Bedo in alternating mode
mid-shell Ln βγ fast-timing
Roussière et al.
n-rich Sb and Te βγ and βn
Li et al.
Sn region βγ and βn
Didierjean et al.
Lozeva et al.
132

n-rich Se βγ and βn
Kurtukian-Nieto et al.
n-rich Ge βγ and βnDuchêne et al.
N=50 βγ
Etile et al.
Astier et al

Lino: Laser-induced nuclear orientation
D Yordanov et allaser spectroscopy in the Sn region:
ground and isomeric state properties of 110-126Ag and 128-133Inβ-decay of polarised 121-126Ag and 128-133In100

Snrp process132

Snr process• more accurate theoretical lifetimes ofthe N=82 isotones below 129Ag• shell quenching vs deformation• shell effect in radii

Lino: Laser-induced nuclear orientation
D Yordanov et alpolarisation by optical pumpingµ & Q from nuclear magnetic resonanceβ-delayed spectroscopy of laser-polarized beams

Polarex: Nuclear Orientation On-LineC Gaulard et al
CSNSM off-line validation
Rejuvenation of the dilution cryostat
Letters of intent received

Preparation at the Alto site
Structure and platforms
Faisceaulogie and beam line design

CSNSM Orsay
LPSC Grenoble
IPN Orsay
INM Paris
University of Tennessee
University of Maryland
University of Oxford
University of Novi Sad

Tas: Total Absorption Spectroscopy
M Fallot & B Rubio et al
Proposed roadmap at Alto:• Phase 1 (2014-2015): install the Valencia-Surrey TAS@ALTO (12 BaF2) at theexisting beam line, for nuclei of interest that could be easily selected• Phase 2 (2014-2016): more challenging cases that the laser ion source forselection, in parallel with development of a dedicated TAS beam line
• Phase 3: synergy with Bedo and Tetra for βn emitters and more exotic
isotopes. Common measurement campaigns with complementary beam lines?
In parallel, new detector developments combining higher resolution
with efficiency such as LaBr3 or CeBr3 for Alto then Spiral-2

IFIC, Valencia
Subatech, Nantes
University of Surrey, Guildford
University of Jyväskylä
Ciemat, Madrid

Initiate the physics for Spiral-2 at Ganil:
Desir, S3, NFS

DETRAPMONSTERTETRA BEDOLINOβ-NMR
BELEN

TETRA
TONNERREBEDO

MLL Trap

Si-CubeTAS
CRISPIPERADELINO

REGLISNFS

RIALTOLICORNE

LPCTrap

GPIB

BESTIOLLUMIERE► niche with stable beams► R&D on Isol & RIB► low-energy physics programme based on photofission► R&D and physics at Alto pave the way to Spiral-2 at Ganil:
initiate physics program, train new generation of isol
physicists, develop instruments and methodologies

Clusters& ion-matterinteraction

Nuclear physics

R&D

Beroff, K et al (2009) NIMB 267,866

Lebois M. et al. Physical Review C, 80(2009)

B. Hy et al., Nucl. Instrum. and Meth.
B288 (2012) 34

M. Chabot et al A&A524,(2010) A39

Q. T. Doan et al. Acta. Pol. B40 (2009)
725

J. Duenas et al NIMA 676 (2012) 70

M. Chabot et al; PRL104 (2010),
043401

R. Lozeva et al AIP Conf. Proc. 1224, 143(2010)

J. Duenas et al NIMA714 48 (2013)

K. Béroff et al : PRA84 (2011) 032705

Q.T. Doan et al. Phys. Rev. C 82, 067306(2010)

M. Chabot et al ; Rev.Sc.Inst82(2011)
103301(high-lighted paper)

D. Curien et al. J. of Phys. CS 205 (2010)
012034

Krauser, J. et al. New Journal of Physics(2011) 13, 083023

Freer et al. J. Phys. G: Nucl. Part. Phys.
37 (2010) 125102

Licorne

Outgoing Neutron kinematic curves

7Li energy

Photo-fission based isol facility

e-LINAC
10 µA 50MeV

TIS vault~5.10^11fissions/s
PARRNemass
separator
secondarybeam lines
BEDO
beta
decay
identification
station81

Zn → 81Ga β decay
no evidence for neutron
excitations at low energy in
81Ga: N=50 is effective

PARRNeOak Ridge,Phys. Rev. C 82, 064314 (2010)
Deep inelastic at Legnaro(9/2-)

G. De Angelis et al. NPA 787 (2007)
74c

f5/23
observé en décroissance βà Orsay (PARRNe)
D. Verney et al PRC 76 (2007)054312

p3/2 f5/22

f5/23

1236

84

Ga → 84Ge β decay
Ga: hot-plasma ionisation (1 µA deutons)
O. Perru et al, EPJA 28, 307 (2006)

Zn: hot plasma ionization(1 µA deutons)
Verney et al, PRC 76, 054312 (2007)

Ga: surface ionisation (2-4 µA electrons)
M. Lebois et al, PRC 80, 044308 (2009)
B. Tastet et al, PRC 87, 054307 (2013)

Zn: laser ionisation(10 µA electrons)
82Zn→82Ga A. Etilé et al.

Ga: laser ionisation (10 µA electrons)
K. Kolos et al, PRC 88, 047301 (2013)
D. Testov et al, to be publishedTwo long lived isomers in 84Ga
low-spin state?

543--- 10

T1/2 =
0,09 s2-624,31-104
684

4+2+GeT1/2 =
0,9 s

247,73-

O. Perru et al., EPJA, 28,p. 307 (2006)
J. S. Thomas PRC 76, 044302 (2007)
D. Verney et al PRC 76, 054312 (2007)

Ge306,5844-

1/283242,4
100

high-spin state

π p3/2 ν d5/2 2-Ga84

As83

As

Progress in the instrumentation of the secondary beam lines
POLAREXLow Temperature Nuclear Orientation
Ge Detector
Angular distribution depends
on spins of the nuclear
states, transition
multipolarities, totalmagnetic field andtemperature.

AND Nuclear Magnetic Resonance
The good frequency-> magnetic moment-> Hyperfine structure-> Nuclear thermometer

Verney – IPN Orsay

INPC 2013 – Firenze – 2-7 May 2013

Progress in the instrumentation of the secondary beam lines
TAS: Total Absorption Spectroscopy program

Verney – IPN Orsay

INPC 2013 – Firenze – 2-7 May 2013

Progress in the instrumentation of the secondary beam lines
TAS: Total Absorption Spectroscopy program