title: Nuclear quadrupole resonance echoes from hexamethylenetetramine.
abstract: We investigated the echo phenomenon of nuclear quadrupole resonance (NQR) from hexamethylenetetramine (HMT). We detected the pure NQR echo signal of HMT with a short pulse interval. The intensity of the echo signal increased as the pulse interval time was decreased. We observed that a clean echo signal was generated even when the pulse interval was shorter than the decay time constant T(2)(*). Since the short interval time gives a strong echo, our result insists that shorter interval time is preferred for the NQR detection.
authors.affiliation: Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan. ota@sup.ee.es.odaka-u.ac.jp
authors.forename: Go
authors.initials: G
authors.lastname: Ota
authors.forename: Hideo
authors.initials: H
authors.lastname: Itozaki