JUROGAM II
Pete Jones
(JUROGAM project manager)
for JUROGAM / GREAT collaboration
Department of Physics
University of Jyväskylä, Finland
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
JUROGAM II : Future Spectroscopy
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Contents
{ Past & Present
{ Experimental methods
{ JUROGAM Physics
{ Developments
{ JUROGAM future
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
A brief history : the JUROSPHERE years
1997-2001
εph=1.7%
σ = 200nb
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
The Present : JUROGAM
2003-2007
εph=4.2%
σ = 20nb
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
JUROGAM
{ 43 Anti-Compton
suppressed HP-Ge
detectors (E = 4.2%
/ 1.3 MeV)
{ JYFL “Host
Laboratory” for ex-
EUROBALL detectors
2003-2007
{ Comprises of all EB
Phase I + GASP
detectors.
{ UK-France loan pool
completes the array
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
How to do what we do…
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
“Complete Spectroscopy”
Jurogam Array
RITU gas−filled recoil separator
Q1
D
Q2
Q3 PIN Diodes
DSSD
Planar
MWPC GREAT
Approx 1 μs
Ge (prompt) Recoil Δt Ge (delayed) Recoil Δt
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Tools of the Trade
{ 2 x 60mm x 40mm DSSD { Triggerless Data Acquisition
{ 28 x 40mm x 40mm PIN Diodes System
{ 24 x 12 Segmented Planar Ge { 100 MHz common clock
{ Compton-Suppressed Segmented Ge
Clover { 10 ns resolution
{ Position-Sensitive MWPC { 380+ channels timestamped
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
JUROGAM Physics
Programme and Methodology
{ Multiple Shape Coexistence
{ Spectroscopy of Heavy Nuclei
{ Study of Nuclei Near Proton Drip Line
{ Study of Isomeric States
{ Lifetime measurements
{ Beta-Decay Tagging
{ Study of Octupole Deformation
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
RDT experiment for 186Pb with JUROGAM+RITU+GREAT
106Pd(83Kr,3n)186Pb
THE
BAN PROL
D ATE
A NE
W BA
ND
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Differential-Plunger-Lifetime measurements by using RDT
for intruder bands in very neutron deficient 186,188Pb and 194Po
Differential plunger inside JUROGAM
114Cd(83Kr,3n)194Po
186 Prola
Pb te 4p
-4h
Oblate 4p-4h
88 Pb
1
194Po
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Structure of SHE Nuclei
208Pb(48Ca,2n) 254No, Z = 102, 2µb
Gamma rays
⇒ discrete
strong yrast
weak nonyrast
lines
209Bi(48Ca,2n) 255Lr, Z = 103, 300nb
Shell-stabilized nuclei
•Shell gaps
•Deformation
•Behaviour with increasing spin
•K- isomers
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
The next step…
BEAMS
TARGET
ARRAY
DAQ
GREAT
RITU / NEW SEPARATOR
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Digital Electronics…
{ Idea : Test both analogue and digital
electronics in real situation
{ Test effects of counting rates
107,109Ag(36Ar,2p2n)139Eu
{ Performance more realistic than with {
sources (multiplicity) { 160MeV β~2.5%
{ Idea of what kind of gamma-ray array { Ib=5 – 50 pnA
need would be for the future { Ge count rate 10-100kHz
{ RITU Gas counter 1-10kHz
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Count Rate & Efficiency…
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Focal Plane Upgrades
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
SAGE : 2007
¾ Simultaneous Gamma and CE studies
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
h11/2 ~250
~440 ns
LISA : 2007 s1/2 0
~1ns
169Au
~2
ΔE-E telescopes p
17
0k
~1
eV
Single element pentagons
9
20
k eV
Single element E quadrants
16 ΔE rings 168Pt
40 readout channels
¾ Fast charged particle decay modes for tagging
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
JUROGAM II : 2008
εph=6%
¾ Efficient and versatile spectrometer
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
New JYFL Vacuum Separator
What kind of research work can be done were the RITU separator is not feasible:
Probing the N ≈ Z line up to 112Ba
- decay spectroscopy (proton and α-particle decay) at the 100Sn region
- rp-process
- proton-neutron pairing interaction
- mirror nuclei
o study of isospin symmetry breaking
o proton skins (N < Z nuclei)
- superdeformation and hyperdeformation (N ≈ Z ≈ 40)
¾ Vacuum mode complementary to RITU
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
Future Horizons
{ JUROGAM
{ SAGE & LISA exploitation 2007+
JUROGAM
JUROGAM
{ Digital Instrumentation (Digital)
JUROGAM II
JUROGAM II 2008 : A Versatile Array
SAGE
{
LISA
1.7.2005 30.12.2005 30.6.2006 29.12.2006 29.6.2007 28.12.2007 27.6.2008 26.12.2008 26.6.2009
{ Future Advances
Pete Jones GAMMAPOOL Workshop 2006 8-12 May 2006
University of Jyväskylä ECT*, Trento Italy
