Application of coincidence Doppler broadening spectroscopy to polypropylene and polyethylene: taking into account the positronium formation
N Djourelov, T Suzuki, RS Yu, V Shantarovich… - Chemical physics, 2004 - Elsevier
The coincidence Doppler broadening (CDB) and positron annihilation lifetime (PAL)
techniques were applied to study low-density polyethylene (LDPE), high-density
polyethylene (HDPE), polypropylene (PP), and antioxidant containing polypropylene (PPA).
It was demonstrated that the Doppler-broadened lines for LDPE and PPA could be
decomposed into two components a narrow component due to positronium (Ps) annihilation
and another broader one due to free positron annihilation. The determined Ps-component in …
techniques were applied to study low-density polyethylene (LDPE), high-density
polyethylene (HDPE), polypropylene (PP), and antioxidant containing polypropylene (PPA).
It was demonstrated that the Doppler-broadened lines for LDPE and PPA could be
decomposed into two components a narrow component due to positronium (Ps) annihilation
and another broader one due to free positron annihilation. The determined Ps-component in …
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