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Laser spectroscopy of short-lived nuclei... Paul Campbell

Laser spectroscopy of short-lived nuclei... Paul Campbell. Cu. K. Na. Super zoom....line ~10 15 Hz. 50 – 5000 yttrium IONS per sec. 102. 101. 100. 99. 98. 97. 96. 95. 94. 93. 92. The IGISOL facility, JYFL. Frequency (MHz). 102. 101. 100. 99. 98. 97. 96. 95. 94. 93.

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Laser spectroscopy of short-lived nuclei... Paul Campbell

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  1. Laser spectroscopy ofshort-lived nuclei...Paul Campbell

  2. Cu K Na

  3. Super zoom....line ~1015 Hz

  4. 50 – 5000 yttrium IONS per sec 102 101 100 99 98 97 96 95 94 93 92 The IGISOL facility, JYFL Frequency (MHz)

  5. 102 101 100 99 98 97 96 95 94 93 92 Frequency (MHz) (Pauli 1924!!!)

  6. To the very neutron rich…..to find?..with what signature?(..using an EM probe to explore neutral particles?)

  7. Nuclear binding...

  8. To date; All shell closures, Sub-shell closures, N=88, Zr region, Octupole regions, Shape coexistence, Haloes appear in isotope shift data..

  9. 1960

  10. 1980

  11. 1990

  12. 2000

  13. 2009

  14. High resolution ionic laser spectroscopy Need narrow bandwidth lasers (~MHz), only lower power (~1mW), CW for stability but as wide a range of wavelengths as possible: So we use dye lasers pumped by CW YAG... The IGISOL facility, JYFL

  15. Pumping in the cooler:

  16. Pumping in the cooler: Ta IONS deep UV

  17. Pumping in the cooler: Ta IONS deep UV Reachable with the dye laser (doubled)..

  18. Optically pump in the cooler In the linear trap the ions are moving relatively rapidly compared to room temperature (40x kT), i.e. 1eV But we can hold them here for 100s of milliseconds... The IGISOL facility, JYFL

  19. Optically pump in the cooler Use broad band lasers (10s GHz fine), need high power for harmonic production, pulsed to achieve power, provide as short a wavelength as possible: So doubled, tripled and quadrupled Ti-Sapphire laser... The IGISOL facility, JYFL

  20. We also own... Doublers for the dye lasers, 3 Nd YAG lasers, 1 Cu Vapour laser, a PDL and PDA, a diode cavity laser (DL100), and n helium neon lasers where n is a large positive integer...

  21. We also own... and a dead Ar ion (30W) and a dead excimer laser (XeCl)... (n.b. they died and we don’t care – we would have been very upset in the past though)

  22. http://personalpages.manchester.ac.uk/staff/Paul.Campbell-3/phystech.htmhttp://personalpages.manchester.ac.uk/staff/Paul.Campbell-3/phystech.htm

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