11:00 〜 11:15
▲ [10a-N206-8] Application of a direct diode-pumped Ti:sapphire laser to high resolution resonance ionization spectroscopy of Americium and Curium
キーワード：ionization, DPSS, spectroscopy
We recently developed a single-frequency Ti:sapphire oscillator using a multimode InGaN diode pumping system, which replaces the traditionally used expensive Nd:YAG pump source. The oscillator acts as a cost-effective master laser source for a pulsed injection-locked amplifier. The master laser so far has demonstrated a tunable wavelength range of up to 200 nm, output power up to 500 mW and a linewidth below 1 MHz if locked to an external reference cavity. The amplifier generates pulses at a repetition rate of 10 kHz with Fourier-transform limited linewidth of approximately 20 MHz at an average power and peak power of 3 W and 10 kW, respectively. The high peak power allows for easy single-pass frequency conversion to the blue and UV.
A similar system was constructed at Mainz University; here a first demonstration experiment aimed at hyperfine spectroscopy of actinides was carried out at the RISIKO mass separator, using perpendicular beam geometry to minimize Doppler-broadening. First spectroscopy on Americium and Curium samples was performed, resulting in resolved hyperfine spectra of several atomic lines and isotopes. Though the first experiments were interrupted and delayed by the pandemic, measurements have now resumed, and additional results are expected soon.
A similar system was constructed at Mainz University; here a first demonstration experiment aimed at hyperfine spectroscopy of actinides was carried out at the RISIKO mass separator, using perpendicular beam geometry to minimize Doppler-broadening. First spectroscopy on Americium and Curium samples was performed, resulting in resolved hyperfine spectra of several atomic lines and isotopes. Though the first experiments were interrupted and delayed by the pandemic, measurements have now resumed, and additional results are expected soon.