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MPINP:
Quantendynamik - Abteilung Blaum
Abstract:
The proof-of-principle experiment for Laser Induced Vibrational Emission (LIVE)
spectroscopy requires the Cryogenic Trap for Fast ion beams (CTF) to be
equipped with a mid-infrared detection system. The novel detection system is
based on Blocked Impurity Band (BIB) sensors with a high sensitivity. The detection
system requires a low black-body background to avoid saturation. The
sequential installation of radiation shields reduces the black-body background of
the CTF substantial.
The non-thermal auto-fragmentation process of the diatomic anions of carbon,
cobalt and silver is studied at the Cryogenic Storage Ring (CSR). Charged fragments
leaving the closed orbit of the CSR are detected by COMPACT at fragment
position. Neutral fragments are detected either by NICE or by COMPACT at
neutral position. The decay curves which deviate from a simple 1/t power-law are
fitted and discussed by two approaches. The fit function requires the tunneling
constants and a distribution of the ro-vibrational states. The tunneling constants
were calculated by the program LEVEL16. Both approaches try to find the distribution
of ro-vibrational states by different methods. The decay pattern of the
diatomic anions are measured up to 1000 s.
