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In-source laser spectroscopy

In-source laser spectroscopy

Laser spectroscopy performed right in the target-ion-source coupled with nuclear detection at the ISAC yield station is where the first determination of atomic hyperfine structure and isotope shifts becomes possible. In the most basic form, the in-source laser spectroscopy is resonance ionization spectroscopy in a Doppler broadened atomic ensemble, and measures large effects (frequency splittings and shifts in the order of GHz). As has been demonstrated on Ag istopes, this allows for the separation of nuclear spin isomers by tuning the laser frequency that is most subject to the splittings and shifts affected by changes in nuclear charge radii, nuclear shape and nuclear magnetic moments. Where this is successful, pure beams of particular nuclear spin isomers can be delivered. 

There are a few approved experiments that will use in-source laser spectroscopy to determine atomic structure (At) and nuclear properties (Ag). 

 

47Silver

  TRIUMF S1246 - Nuclear Spin Isomer separation with RILIS - in-source part in preparation.

(Nov. 2013)  110g Ag from HP Ta target.

48Cadmium

Dec.2013 - UCx target with IG-LIS

newProposals

   

81Thallium

Nov. 2012

Blue-green RILIS scheme developed. 

 

84Polonium

Sept. 2012

Blue-Blue RILIS scheme developed. Rydberg series measured. First ionization potential determined (to be published)

 

85Astatine

  TRIUMF S1237 - Dec. 2010 & Sept. 2011 - continuing

High lying atomic energy levels foundwith grating TiSa laser scans (fundamental & frequency doubled).

New atomic energy levels found for a more efficient (50x) excitation scheme (2,1'). 198-199, 217-219At measured.

CERN ISOLDE I87  - Nov. 2010/2011: first Atstatine RILIS beam ever, with a one step resonant, one step non resonant (1.1') excitation scheme. First ever experimental determination of theionization potential (IP). Literature values for 216nm and 224nm transitions confirmed. / IP determination via Rydberg series.

Dec.2013 from IG-LIS (isobar free beams)

fall 2014 from UCx target

 

 

 

88Radium

Jan 2012

Blue-IR-532nm RILIS scheme developed. 4x enhancement measured.

Jan 2014

in-source laser spectroscopy

 

89Actinium

Sept & Dec2011/ Jan2012/ Sept2012 /Jan2014 (IG-LIS)/ Jul2014

High lying atomic energy levels scanned using fundamental & frequency doubled grating TiSa laser

New atomic energy levels, and an efficient RILIS scheme were found. IS measurements - data evaluation in progress (thesis A. Teigelhoefer) 

 

 92 Uranium

08/2016 U pilot beam with blue-blue laser scheme for IG-LIS operation

94 Plutonium

08/2013 yield with classic RILIS scheme

 

20Calcium

2014 new RILIS scheme offline with subtantially enhanced yield (5x) over non-resonant 

 

25Manganese

2012 yield & RILIS scheme demonstrated on-line

2016 new yield measurements

 


 

28Nickel

2012 yield & 

RILIS scheme demonstrated on-line

 

 

29Zinc

2012 yield & RILIS scheme demonstrated on-line

30Copper

2012 yield & RILIS scheme demonstrated on-line 

38 Strontium

2013   94Sr for charge breeding and post acceleration

47Silver

  TRIUMF S1246 - Nuclear Spin Isomer separation with RILIS - in-source part in preparation.

(Nov. 2013)  110g Ag from HP Ta target.

48Cadmium

Dec.2013 - UCx target with IG-LIS

49 Indium

50 Tin

  

51 Antimony

RILIS scheme developed off-line -> ready for online yields

52 Tellurium

 

 

 62 Samarium

2016 yield on-line

63 Europium

2015 yield & RILIS scheme demonstrated on-line

 

 65 Terbium

08/2016 yield

66Dysprosium

2013 yield & RILIS scheme demonstrated on-line -> particularly useful for IG-LIS isobar free beams

67Holmium

2013 yield & RILIS scheme demonstrated on-line -> particularly useful for IG-LIS isobar free beams

 68 Erbium

08/2013 yield with classic RILIS scheme

69 Thulium

70 Ytterbium

2016 yield & RILIS scheme demonstrated on-line (high yields)

 71 Lutetium

2015 yield with classic RILIS scheme