Recent highlights from ISOLDE

1
Recent highlights from ISOLDE

• News from the facility
• Users meeting, February 6-8
• ....and some physics results
• IS367 REX 9Li beam
• IS413 mass measurements
• IS427 moments of Mg nuclei
• IS429 parity non-conservation
• IS439 moments of Cu nuclei

2
Outcome of review (NuPAC meeting)
CERN Research Board, December 1, 2005 meeting
3
HIE-ISOLDE

• Detailed plans being prepared
• Upgrade in several dimensions
• REX energy
• proton beam intensity
• beam quality
• new ISOL beams
• Outside funding
• Wallenberg foundation, 14.5 MSEK (1.5 MEuro) for
  RILIS upgrade
• Leuven, 0.6 MEuro
• ManchesterBirmingham, 0.16 MEuro for RFQ cooler

4
IS413 - ISOLTRAP
Nuclides measured in 2005
126Xe, 136Xe
first doubly charged ions
127,128,131-134Sn
118,120,122-124Cd
71-81Zn
5
IS413 ISOLTRAP, heavy Zn
September/October 2005
Preliminary evaluation
81Zn resonance
6
IS367 REX, 9Li on d target
October 2005
9Li 2H ? 8Li t 3 MeV/u beam energy two DSSSD
telescopes
7
Parity non-conservation in nuclei 180mHf
revisitedIS429 collaboration - NICOLE
October 2005
H H0 HPNC case of 180mHf - mixture of 8-
(K 8) and 8 (K 0) states (?E 57
keV) - regular transition strongly
suppressed by K 8 difference
Anisotropy of 511 keV transition relative to 444
keV for B-field alternatively up and down
?
8
Collaps laser and ß-NMR spectroscopy
Optical
N
detection
Beam
deflector
(weak) Guiding field
o
Scintillator 0
RF coil
s
s
s
s
s
laser




















Crystal


Scintillator 180
o

/
-
5kV
Doppler
tuning

s
voltage

Mg beam from
ISOLDE, 60keV
(strong) NMR field
Procedure
Spin polarisation by optical pumping
HFS seen in b-decay asymmetry
Ion velocity set to highest asymmetry, NMR scan
by changing rf frequency
Larmor frequency seen as drop in asymmetry
9
IS427 heavy Mg isotopes
Sigma
September 2005
Measured 33Mg. HFS found, not yet NMR-peak. Run
in 2006 to determine spin and magnetic moment.
Sigma-
I3/2, 7/2 Almost the same picture
10
IS439 - copper isotopes
Stable beam test, March 2006
March 2006 Stable beam test A1/25865(2),
B3/2-28(2) Literature (RF measurements and
level mixing) A1/25866.915(5), B3/2-28.8(6)
A detection efficiency 130 000 for the
strongest component of the hyperfine structure.
2P3/2
Given the yields at ISOLDE this will allow
COLLAPS to study copper isotopes up to and
including 72Cu.
A3/2,B3/2
2S1/2
2A1/2