You are here

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). 

 

47 silver

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

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

48 cadmium

Dec.2013 - UCx target with IG-LIS 

non-resonant ionization

newProposals

   

81 thallium

Nov. 2012

Blue-green RILIS scheme developed. 

 

84 polonium

Sept. 2012

Blue-Blue RILIS scheme developed. Rydberg series measured. First ionization potential Spectrochimica Acta B (2018)

 

85 astatine

  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

 

 

 

88 radium

Jan 2012

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

Jan 2014

in-source laser spectroscopy (continuing)

 

89 actinium

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

20 calcium

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

25 manganese

2012 yield & RILIS scheme demonstrated on-line

2016 new yield measurements

 

28 nickel

2012 yield & 

RILIS scheme demonstrated on-line 

29 zinc

2012 yield & RILIS scheme demonstrated on-line

30 copper

2012 yield & RILIS scheme demonstrated on-line 

38 strontium

2013   94Sr for charge breeding and post acceleration

47 silver

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

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

48 cadmium

Dec.2013 - UCx target with IG-LIS

non-resonant ionization

49 indium

non-resonant ionization

50 tin

 Scheerer (1992) 

51 antimony

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

52 tellurium

off-line development done (2018)

61 promethium 

 62 samarium

2016 yield on-line

63 europium

2015 yield & RILIS scheme demonstrated on-line

64 gadolinium

 65 terbium

08/2016 yield

66 dysprosium

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

67 holmium

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

2018 yield

70 ytterbium

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

 71 lutetium

2015 yield with classic RILIS scheme