TY - JOUR
T1 - Study of laser interaction with negative ions
AU - Berkovits, D.
AU - Boaretto, E.
AU - Hollos, G.
AU - Kutschera, W.
AU - Naaman, R.
AU - Paul, M.
AU - Vager, Z.
PY - 1990/12/2
Y1 - 1990/12/2
N2 - Negative ions can be neutralized by detaching their additional electron through interaction with a laser beam. By properly choosing the laser wavelength, the process is highly selective; it can in principle enhance the discrimination power of an accelerator mass spectrometry system for ions of different elements (e.g. isobaric background) by allowing their separation prior to their injection into a tandem accelerator. We demonstrate this process in the case of the 59Ni- 59Co pair with the AMS system based on the Rehovot 14UD Pelletron accelerator and a pulsed Nd-YAG laser at the fundamental wavelength (1064 nm). A photodetachment cross section of (0.6 ± 0.3) × 10-17 cm2 was measured for 59Co- and a suppression factor of 125 for the 59Co isobaric background was achieved in a 59Ni AMS measurement. The duty factor due to the pulsed laser was about 10-4. The laser-AMS system was also applied to the study of rare negative ions in the actinide region. Preliminary results on the laser interaction with uranium negative ions are reported.
AB - Negative ions can be neutralized by detaching their additional electron through interaction with a laser beam. By properly choosing the laser wavelength, the process is highly selective; it can in principle enhance the discrimination power of an accelerator mass spectrometry system for ions of different elements (e.g. isobaric background) by allowing their separation prior to their injection into a tandem accelerator. We demonstrate this process in the case of the 59Ni- 59Co pair with the AMS system based on the Rehovot 14UD Pelletron accelerator and a pulsed Nd-YAG laser at the fundamental wavelength (1064 nm). A photodetachment cross section of (0.6 ± 0.3) × 10-17 cm2 was measured for 59Co- and a suppression factor of 125 for the 59Co isobaric background was achieved in a 59Ni AMS measurement. The duty factor due to the pulsed laser was about 10-4. The laser-AMS system was also applied to the study of rare negative ions in the actinide region. Preliminary results on the laser interaction with uranium negative ions are reported.
UR - http://www.scopus.com/inward/record.url?scp=1842747694&partnerID=8YFLogxK
U2 - 10.1016/0168-583x(90)90441-v
DO - 10.1016/0168-583x(90)90441-v
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:1842747694
SN - 0168-583X
VL - 52
SP - 378
EP - 383
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 3-4
ER -