フクミ アツシ
  福見 敦
   所属   川崎医療福祉大学  医療技術学部 診療放射線技術学科
   職種   准教授
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Coherence decay measurement of v = 2 vibrons in solid parahydrogen
掲載誌名 正式名:Journal of Chemical Physics
略  称:J. Chem. Phys.
ISSNコード:00219606/10897690
巻・号・頁 138(2),1-6頁
著者・共著者 Susumu Kuma, Yuki Miyamoto, Kyo Nakajima, Atsushi Fukumi, Kentarou Kawaguchi,
Itsuo Nakano, Noboru Sasao, Minoru Tanaka, Jian Tang, Takashi Taniguchi, Satoshi Uetake, Tomonari Wakabayashi, Akihiro Yoshimi, Motohiko Yoshimura
発行年月 2013/01
概要 The coherence decay of the v = 2 vibrational state (vibrons) of solid parahydrogen was
measured via time-resolved coherent anti-Stokes Raman spectroscopy. We found that the
decay curve has a non-exponential time profile in the time scale of 200 ns at a low
temperature below 5 K and a low orthohydrogen impurity concentration (∼0.01%). This
behavior, as also observed in the case of the v = 1 vibrons, represents a signature of band
structure of the v = 2 state in the solid phase. The maximum coherence decay time of 50 ns
in an exponential part was achieved, which shows excellence of the v = 2 state for coherent
processes. We also found that finite temperatures, orthohydrogen impurities, and other
structural inhomogeneity accelerate the decay, hiding the non-exponential feature of the
vibron band.